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Journal articles on the topic 'Silane compounds. Titanium dioxide Adsorption'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Eltekova, N. A., and Yu A. Eltekov. "Adsorption of aromatic compounds from solutions on titanium dioxide and silica." Langmuir 3, no. 6 (1987): 951–57. http://dx.doi.org/10.1021/la00078a012.

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2

Mamaghani, Alireza Haghighat, Fariborz Haghighat, and Chang-Seo Lee. "Gas phase adsorption of volatile organic compounds onto titanium dioxide photocatalysts." Chemical Engineering Journal 337 (April 2018): 60–73. http://dx.doi.org/10.1016/j.cej.2017.12.082.

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3

Fang, Lian Min, Peng Liu, Ying Chen, and Zhi Wu Yu. "Preparation of Nano Silicon Dioxide with Sol-Gel Method." Key Engineering Materials 609-610 (April 2014): 298–305. http://dx.doi.org/10.4028/www.scientific.net/kem.609-610.298.

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The influences of temperature, compounds dosages and water on the size of nanosilica prepared by tetraethyl orthosilicate were discussed, and the transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR) were employed to investigate the characteristics of the nanosilica synthesized by the sol-gel method. Moreover, the silane coupling agent was also used to modify the surface characteristic of the nanosilica. Results showed that the influences of temperature, compounds dosages and water on the size of nanosilica had a significant impact. In fact, the optimal synt
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4

Demeestere, Kristof, Jo Dewulf, Herman Van Langenhove, and Bram Sercu. "Gas–solid adsorption of selected volatile organic compounds on titanium dioxide Degussa P25." Chemical Engineering Science 58, no. 11 (2003): 2255–67. http://dx.doi.org/10.1016/s0009-2509(03)00087-3.

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5

Zhong, Lexuan, Chang-Seo Lee, and Fariborz Haghighat. "Adsorption performance of titanium dioxide (TiO2) coated air filters for volatile organic compounds." Journal of Hazardous Materials 243 (December 2012): 340–49. http://dx.doi.org/10.1016/j.jhazmat.2012.10.042.

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6

Mollahosseini, Afsaneh, Yousef Elyasi, and Mohammad Rastegari. "An improvement of electrospun membrane reusability via titanium dioxide nanoparticles and silane compounds for the electromembrane extraction." Analytica Chimica Acta 1088 (December 2019): 168–77. http://dx.doi.org/10.1016/j.aca.2019.08.050.

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7

Esumi, Kunio, Hiroshi Hayashi, Yoshifumi Koide, Tsuneo Suhara, and Hiroshi Fukui. "Adsorption of metal ion and aromatic compounds by anionic surfactant-coated particles of titanium dioxide." Colloids and Surfaces A: Physicochemical and Engineering Aspects 144, no. 1-3 (1998): 201–6. http://dx.doi.org/10.1016/s0927-7757(98)00567-6.

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8

Al Qarni, Fatimah, Nuhad A. Alomair, and Hanan H. Mohamed. "Environment-Friendly Nanoporous Titanium Dioxide with Enhanced Photocatalytic Activity." Catalysts 9, no. 10 (2019): 799. http://dx.doi.org/10.3390/catal9100799.

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Nanoporous TiO2 anatase was environment-friendly prepared using coffee husk extract (CHE) as bio-template instead of hazardous chemicals and solvents and ultrasonic waves. Caffeine and caffeic acid were found to be the main compounds in CHE to modify the morphology of TiO2. The properties of as-prepared titanium dioxide particles were determined by different characterization techniques. The results demonstrate the formation of a meso/macro-porous channel consisting of small TiO2 particles (8–10 nm). The as prepared green nanoparticles exhibited improved photocatalytic activity for the degradat
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9

Toh-Ae, Pornsiri, Banja Junhasavasdikul, Natinee Lopattananon, and Kannika Sahakaro. "Surface Modification of TiO2 Nanoparticles by Grafting with Silane Coupling Agent." Advanced Materials Research 844 (November 2013): 276–79. http://dx.doi.org/10.4028/www.scientific.net/amr.844.276.

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Titanium dioxide (TiO2) possesses excellent photocatalytic activity and provides UV protection for polymeric materials. The nanosized TiO2 particles with larger surface area to volume ratio and an increased surface reactivity shall impart better photocatalysis and UV protection efficiency to the rubber compounds, compared to the use of conventional micron-sized particles. Direct incorporation of TiO2 nanoparticles (n-TiO2) into non-polar rubbers faces incompatibility problem between the two phases. One of the solutions to overcome this problem is to treat the nanoparticle surface by using sila
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10

Gomonsirisuk, Khemmakorn, Thanakorn Wasanapiarnpong, and Charusporn Mongkolkachit. "Phenol Removal from Contaminated Wastewater Using Activated Carbon/Zeolite Composite Coated with Titanium Dioxide." Key Engineering Materials 690 (May 2016): 103–8. http://dx.doi.org/10.4028/www.scientific.net/kem.690.103.

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Phenol and phenolic compounds in wastewater from various industries were toxic to water livings and human even in ppm concentration. A number of photocatalysts and adsorbents were applied for the low cost and good efficiency wastewater management to reduce phenol concentration in water. In this work titanium dioxide, one of high efficiency photocatalysts which is widely used in water treatement, was coated on the fabricated adsorbent composite substrate. The composite substrate composed of activated carbon and NaA zeolite presents high phenol adsorption because of high porosity and good ion ex
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11

Bahadori, Aida Bahadori, and Mehdi Ranjbar Corresponding. "Removal of organic dye compounds in water and wastewater samples based on covalent organic frameworks -titanium dioxide before analysis by UV-VIS spectroscopy." Analytical Methods in Environmental Chemistry Journal 4, no. 01 (2021): 58–67. http://dx.doi.org/10.24200/amecj.v4.i01.131.

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A simple and rapid microwave-assisted combustion method was developed to synthesize homogenous carbon nanostructures (HCNS). This research presents a new and novel nanocomposite structures for removal of methylene red (2-(4- Dimethylaminophenylazo)benzoic acid), methylene orange (4-[4-(Dimethylamino)phenylazo]benzenesulfonic acid sodium salt) and methylene blue (3,7-bis(Dimethylamino)phenazathionium chloride)with semi degradation-adsorption solid phase extraction (SDA-SPE) procedure before determination by UV-VIS spectroscopy. A covalent organic frameworks (COFs) with high purity were synthesi
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12

Romero, Violette, Pilar Marco, Jaime Giménez та Santiago Esplugas. "Adsorption and Photocatalytic Decomposition of theβ-Blocker Metoprolol in Aqueous Titanium Dioxide Suspensions: Kinetics, Intermediates, and Degradation Pathways". International Journal of Photoenergy 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/138918.

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This study reports the photocatalytic degradation of theβ-blocker metoprolol (MET) using TiO2suspended as catalyst. A series of photoexperiments were carried out by a UV lamp, emitting in the 250–400 nm range, providing information about the absorption of radiation in the photoreactor wall. The influence of the radiation wavelength on the MET photooxidation rate was investigated using a filter cutting out wavelengths shorter than 280 nm. Effects of photolysis and adsorption at different initial pH were studied to evaluate noncatalytic degradation for this pharmaceutical. MET adsorption onto ti
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13

Zahraa, O., L. Sauvanaud, G. Hamard, and M. Bouchy. "Kinetics of atrazine degradation by photocatalytic process in aqueous solution." International Journal of Photoenergy 5, no. 2 (2003): 87–93. http://dx.doi.org/10.1155/s1110662x03000187.

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The photocatalytic degradation of the herbicide atrazine has been studied using suspended titanium dioxide as catalyst. The Langmuir-Hinshelwood model is satisfactorily obeyed at initial time and in the course of the reaction. The rate of degradation is found to be enhanced by the addition of persulphate ions. Competitive degradation between atrazine and other pollutants is satisfactorily interpreted as monitored by a competitive adsorption of the reactants. As a consequence, efficient reactants such as salicylic acid and phenol delay atrazine degradation until these compounds are degraded.
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14

Amar, Abdelouahed, Ilyasse Loulidi, Abderrahim Kali, Fatima Boukhlifi, Chaimaa Hadey, and Maria Jabri. "Physicochemical Characterization of Regional Clay: Application to Phenol Adsorption." Applied and Environmental Soil Science 2021 (May 3, 2021): 1–9. http://dx.doi.org/10.1155/2021/8826063.

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Phenol is one of the most toxic pollutants found in industrial waste. This work focuses on the removal of phenol using clay from the Sale region. Adsorbent was characterized by X-ray fluorescence spectroscopy, X-ray diffraction, infrared spectroscopy, and scanning electron microscopy. The chemical analysis of this clay shows that the percentage of silicon and aluminium is quite high, and the percentage of calcium and iron is relatively high, so this material is rich in muscovite, quartz, and calcite. In addition to the presence of titanium dioxide (TiO2), which can give it a property of degrad
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15

Al-Dawery, Salam K. "Regeneration of Activated Carbon Using Photo-Oxidation Process." Advanced Materials Research 906 (April 2014): 159–66. http://dx.doi.org/10.4028/www.scientific.net/amr.906.159.

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Activated carbon has been used as an adsorbent for centuries. For purpose of regeneration, advanced oxidation processes is sugested, this approcah could be viable from the econmic and environmental point of view, and appears as an alternative to the many of inefficient single-step processes actaully applied for the regeneration process. The results showed that the Titanium dioxide can easily regenerate the AC by oxidizing the organic compounds adsorbed on the surface of AC. The increase of UV light intensity has a positive effect on the adsorption capacity. However, the increase of TiO2 concen
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16

Hoffmann, Norbert. "Photocatalysis with TiO2 Applied to Organic Synthesis." Australian Journal of Chemistry 68, no. 11 (2015): 1621. http://dx.doi.org/10.1071/ch15322.

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Titanium dioxide is a versatile heterogeneous catalyst. Absorption of light by a TiO2 particle leads to the formation of an electron–hole pair. Electron transfer from or to the particle induces redox reactions. Although mainly applied in the context of environmental chemistry, these processes are also used to selectively transform organic compounds. Oxidations and reductions have been carried out. Applications to the synthesis of heterocycles have been reported. Many C–C bond formation reactions have been performed. Owing to adsorption of the substrates or by different surface modifications, v
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17

Молвинских, Вера, Vera Molvinskikh, Надежда Белоконова, et al. "CLINICAL AND EXPERIMENTAL SUBSTANTIATION OF THE CHOICE OF TOOTHPASTES ON THE BASIS OF MONITORING THE COMPOSITION OF THE ORAL FLUID IN THE INHABITANTS OF INDUSTRIAL AREAS." Actual problems in dentistry 15, no. 1 (2019): 33–37. http://dx.doi.org/10.18481/2077-7566-2019-15-1-33-37.

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The inhabitants of industrial areas are influenced by anthropogenic factors. Harmful chemicals enter the body from the air, drinking water, food and are found in the oral fluid, hard tooth tissues, dental deposits, biopsy of tissue structures and contribute to the development of caries and inflammatory periodontal diseases. Toothpastes and mouthwashes are used for prevention of major dental diseases. The toothpastes contain a variety of abrasives: silicon dioxide, calcium carbonate, titanium dioxide, calcium bicarbonate, hydroxyapatite, which can act as adsorbents of heavy metal compounds. Bio
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18

Chan, A. H. C., J. F. Porter, J. P. Barford, and C. K. Chan. "Photocatalytic thin film cascade reactor for treatment of organic compounds in wastewater." Water Science and Technology 44, no. 5 (2001): 187–95. http://dx.doi.org/10.2166/wst.2001.0283.

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The photocatalytic oxidation of benzoic acid was investigated in a pilot scale-cascade photoreactor. The photoreactor consists of an array of UV lamps (40 W, 365 nm) illuminating a cascade of three inclined 316 stainless steel plates, on which titanium dioxide (TiO2) was immobilized by electrophoretic deposition. The percentage removal of total organic carbon (TOC) of liquid samples was determined. The photocatalytic process was affected by several operating parameters. Increasing the solution temperature was found to reduce the dissolved oxygen (DO) level and to decrease the rate of the degra
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19

Kapinus, Evgeny I., Tatyana A. Khalyavka, Valentina V. Shimanovskaya, Tatyana I. Viktorova, and Vladimir V. Strelko. "Photocatalytic activity of spectro-pure titanium dioxide: Effects of crystalline structure, specific surface area and sorption properties." International Journal of Photoenergy 5, no. 3 (2003): 159–66. http://dx.doi.org/10.1155/s1110662x0300028x.

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Dispersed optically pure anatase, rutile and two-phase samples of titanium dioxide were prepared using a sol-gel technique. In particle of two-phase samples, the anatase nuclei are surrounded by a rutile envelope. Content of anatase in the two-phase particles varied between 20 and 80%. Particles of all theTiO2samples had a globular shape of diameter between 10 and 30μm. When compared to the corresponding technical-grade samples, the optically pure anatase and rutile demonstrated higher photocatalytic activity in the destruction of tetradecylpyridinium chloride, Methylene Blue and tetrachlorofl
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20

Klauson, D., and S. Preis. "The Influence of Iron Ions on the Aqueous Photocatalytic Oxidation of Deicing Agents." International Journal of Photoenergy 2007 (2007): 1–7. http://dx.doi.org/10.1155/2007/89359.

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An experimental research into aqueous photocatalytic oxidation (PCO) of the deicing compounds, 2-ethoxyethanol (2-EE), diethylene glycol monomethyl ether (DEGMME), and ethylene glycol (EG) was undertaken. The addition of iron ions to the acidic aqueous solutions to be treated displayed complex influence on the oxidation efficiency of the above mentioned substances, resulting in a sharp increase of the PCO efficiency at smaller concentrations of iron ions followed by a drastic decrease with the increasing iron ion concentrations. The phenomena observed can be explained by the electron scavengin
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21

Huo, Peipei, Parveen Kumar, and Bo Liu. "The Mechanism of Adsorption, Diffusion, and Photocatalytic Reaction of Organic Molecules on TiO2 Revealed by Means of On-Site Scanning Tunneling Microscopy Observations." Catalysts 8, no. 12 (2018): 616. http://dx.doi.org/10.3390/catal8120616.

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The interaction of organic molecules and titanium dioxide (TiO2) plays a crucial role in many industry-oriented applications and an understanding of its mechanism can be helpful for the improvement of catalytic efficiency of TiO2. Scanning tunneling microscopy (STM) has been proved to be a powerful tool in characterizing reaction pathways due to its ability in providing on-site images during the catalytic process. Over the past two decades, many research interests have been focused on the elementary reaction steps, such as adsorption, diffusion, and photocatalytic reaction, occurring between o
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22

Yoshito, Walter Kenji, Nildemar A. M. Ferreira, Ana Carolina S. Coutinho Rumbao, Dolores Ribeiro Ricci Lazar, and Valter Ussui. "Hydrothermal Synthesis of Nanostructured Titania." Materials Science Forum 660-661 (October 2010): 788–93. http://dx.doi.org/10.4028/www.scientific.net/msf.660-661.788.

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Titania ceramics have many applications due to its surface properties and, recently, its nanostructured compounds, prepared by hydrothermal treatments, have been described to improve these properties. In this work, commercial titanium dioxide was treated with 10% sodium hydroxide solution in a pressurized reactor at 150°C for 24 hours under vigorous stirring and then washed following two different procedures. The first one consisted of washing with water and ethanol and the second with water and hydrochloric acid solution (1%). Resulting powders were characterized by X-ray diffraction, N2 gas
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23

Busch, Arne, and Robert Brandt. "Characterization of the Bonded Connection in Hybrid-Steel-GFRP-Laminates." Key Engineering Materials 742 (July 2017): 408–15. http://dx.doi.org/10.4028/www.scientific.net/kem.742.408.

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Intrinsic hybrid laminates are well established since many years in aerospace engineering, e.g. Glass Laminate Aluminium Reinforced Epoxy (GLARE) is widely used as a substitute for aluminium sheets of the outer shell of modern aircrafts. The reduction of density and an increased stiffness by compounding glass fiber and aluminium makes GLARE advantageous. Driven by environmental protection acts and the need for lightweight design material compounds attract more awareness in the automotive engineering as well. Functional components like chassis springs are well predestined for the application of
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24

Valencia, S., J. Marín, G. Restrepo, and F. H. Frimmel. "Evaluation of photocatalytic degradation of a commercial humic acid in water using a simulated solar UV irradiation and monitoring the changes by size exclusion chromatography." Water Supply 11, no. 6 (2011): 692–98. http://dx.doi.org/10.2166/ws.2011.085.

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Much research has been undertaken on the photocatalytic degradation of humic substances with titanium dioxide using commercial humic acids (HA), which are extracts from either peat or coal. Most of the research has been focused on the changes in dissolved organic carbon (DOC) and UV254 absorption. These parameters only give a general assessment. This work studies the changes in the physical and structural properties of a commercial humic acid by size exclusion chromatography with DOC and UV254 absorption detection (SEC-DOC, SEC-UV254), and the evolution of halogenated organic compounds (AOX) a
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25

Haroun, Ahmed A., Abdel-Tawab H. Mossa, and Samia M. M. Mohafrash. "Preparation and Biochemical Evaluation of Functionalized Multi-Walled Carbon Nanotubes with Punica granatum Extract." Current Bioactive Compounds 15, no. 1 (2019): 138–44. http://dx.doi.org/10.2174/1573407214666180530095912.

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Background: Funcionalized multi-walled carbon nanotubes (ox-MWCNTs) were used for the preparation of therapeutic nanoparticles for delivery of some bioactive compounds. Consequently, this work deals with the preparation of grafted MWCNTs with n-vinyl caprolactam in the presence of pomegranate peel extract (P. granatum), titanium dioxide (TiO2) and/or silver nanoparticeles and their toxic effects on male mice using in vivo biological examination (liver and kidney dysfunction biomarkers) and the histopathological analysis. Methods: P. granatum extract was immobilized onto functionalized MWCNTs u
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26

Calogero, Giuseppe, Ilaria Citro, Gioacchino Calandra Sebastianella, et al. "A Photoelectrochemical Study of Bioinspired 2-Styryl-1-Benzopyrylium Cations on TiO2 Nanoparticle Layer for Application in Dye-Sensitized Solar Cells." Materials 12, no. 24 (2019): 4060. http://dx.doi.org/10.3390/ma12244060.

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In the present work, five 2-styryl-1-benzopyrylium salts and their relative self-assembly processes towards TiO2 nanocrystalline layers were evaluated as photosensitizers in dye-sensitized solar cells (DSSCs). Integration of these 2-styryl-1-benzopyrylium salts with the semiconductor allow for the performance of highly specific functions suitable for smart applications in material science. Spectroscopic and photoelectrochemical measurements conducted on these five bio-inspired dyes, in solution and upon adsorption onto titanium dioxide films, allowed detailed discussion of the anchoring abilit
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27

Muthukumaran, Shobha, Lili Song, Bo Zhu, et al. "UV/TiO2 photocatalytic oxidation of recalcitrant organic matter: effect of salinity and pH." Water Science and Technology 70, no. 3 (2014): 437–43. http://dx.doi.org/10.2166/wst.2014.221.

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Photocatalytic oxidation processes have interest for water treatment since these processes can remove recalcitrant organic compounds and operate at mild conditions of temperature and pressure. However, performance under saline conditions present in many water resources is not well known. This study aims to explore the basic effects of photocatalysis on the removal of organic matter in the presence of salt. A laboratory-scale photocatalytic reactor system, employing ultraviolet (UV)/titanium dioxide (TiO2) photocatalysis was evaluated for its ability to remove the humic acid (HA) from saline wa
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28

da Costa Duarte, Rodrigo, Matheus Costa de Oliveira, Josene Maria Toldo, Paulo Fernando Bruno Gonçalves, Marcos José Leite Santos, and Fabiano Severo Rodembusch. "Guest-Host Interactions in Symmetrical Carboxy Heptamethine Cyanine Dyes-Titanium Dioxide Systems: Synthesis, Theoretical Calculations, Aggregation Properties, and Application in Dye-Sensitized Solar Cells." International Journal of Photoenergy 2021 (January 25, 2021): 1–17. http://dx.doi.org/10.1155/2021/8852979.

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In this work, the role of deoxycholic acid (DCA) as a coadsorbent was investigated in the sensitization of mesoporous TiO2 layers (host) with symmetrical carboxy heptamethine cyanine dyes (guest). Different approaches have been tested, aimed at reducing the H-aggregation and minimizing the competition between cyanine molecules and DCA for active sites of the host, thus improving solar cell efficiency. Heptamethine cyanines containing carboxylic anchoring groups were obtained with good yields. The cyanines present UV-Vis absorption in methanol and dimethylformamide solutions ascribed to fully a
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29

RANGEL, R., J. D. GARCÍA-ESPINOZA, I. ESPITIA, et al. "SYNTHESIS OF MESOPOROUS OF NyTi1–xCexO2–y STRUCTURES AND ITS VISIBLE LIGHT INDUCED PHOTOCATALYTIC PERFORMANCE." Nano 08, no. 05 (2013): 1350051. http://dx.doi.org/10.1142/s1793292013500513.

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The present work was addressed to study the visible light induced performance as photocatalysts of mesoporous N y Ti 1–x Ce x O 2–y structures obtained under microwave irradiation. The titanium dioxide ( TiO 2) was doped with cerium and nitrogen in order to improve the quantum efficiency of the TiO 2 and to shift its adsorption spectra to the visible region. The prepared meso-powders were analyzed by means of X-ray diffraction (XRD), scanning Electron microscopy (SEM), infrared (IR) spectroscopy, transmission electronic microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The surface a
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30

Saleem, Haleema, and Syed Javaid Zaidi. "Developments in the Application of Nanomaterials for Water Treatment and Their Impact on the Environment." Nanomaterials 10, no. 9 (2020): 1764. http://dx.doi.org/10.3390/nano10091764.

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Nanotechnology is an uppermost priority area of research in several nations presently because of its enormous capability and financial impact. One of the most promising environmental utilizations of nanotechnology has been in water treatment and remediation where various nanomaterials can purify water by means of several mechanisms inclusive of the adsorption of dyes, heavy metals, and other pollutants, inactivation and removal of pathogens, and conversion of harmful materials into less harmful compounds. To achieve this, nanomaterials have been generated in several shapes, integrated to form
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31

Scrimieri, Luigi, Luciano Velardi, Antonio Serra, et al. "Enhanced adsorption capacity of porous titanium dioxide nanoparticles synthetized in alkaline sol." Applied Physics A 126, no. 12 (2020). http://dx.doi.org/10.1007/s00339-020-04103-2.

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Abstract In recent years, the exploitation of natural resources and industrial development have led to the production of harmful pollutants. Much of these contaminants end up in water resources, reducing the availability of drinking water. Therefore, it is necessary to find remedies to this situation. Solutions could be the adsorption or the degradation through photocatalysis of these compounds. A good candidate for this task is titanium dioxide (TiO2), due to its non-toxicity, stability and low cost. In this work, we propose a novel synthesis of TiO2 nanoparticles (NPs), with high adsorption
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32

Takeda, Satoshi, and Makoto Fukawa. "Surface Modification of Sputtered SiO2 Thin Films by Metal Doping." MRS Proceedings 750 (2002). http://dx.doi.org/10.1557/proc-750-y5.30.

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ABSTRACTThe effects of metal doping on the surface properties of sputtered silicon dioxide (SiO2) thin films were investigated. The aluminum (Al), titanium (Ti) or zirconium (Zr) doped SiO2 thin films were deposited onto glass by RF magnetron sputtering. The optical transmission spectra of the films were almost same as that of undoping film when the doping concentration was lower than ∼3 at %. The contact angle of water droplets was measured for the films as a function of elapsed time. The hydrophobicity, resulting from the adsorption of organic substances in the atmosphere, was significantly
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