Article
Chemistry, Applied
M. Perez-Gonzalez, S. A. Tomas
Summary: Photocatalytic Ag-loaded (TiO2)(0.95)-(ZnO)(0.05) thin films were successfully synthesized using the sol-gel dip-coating method, with the incorporation and surface diffusion of Ag confirmed by secondary ion mass spectrometry measurements. X-ray photoelectron spectroscopy revealed the chemical composition and electronic structure of the samples, confirming the presence of TiO2 and ZnO. The best response in photocatalytic activity was observed in the (TiO2)(0.95)-(ZnO)(0.05) thin films doped with 2 mol% Ag.
Article
Chemistry, Multidisciplinary
Sanya Khursheed, Rida Tehreem, Muhammad Awais, Dilshad Hussain, Muhammad Imran Malik, Young Sun Mok, Ghayas Uddin Siddiqui
Summary: The purpose of this study was to investigate the effect of photocatalytic degradation using nitrogen and tungsten co-doped titania (TiO2) nanoparticles, which are cost-effective and environmentally friendly. The synthesized nanoparticles were analyzed using various techniques, including spectroscopy, microscopy, and spectrometry. The co-doping of metal and non-metal enhanced the photocatalytic properties of the TiO2 nanoparticles, particularly in the visible region. This resulted in improved absorption of visible light and reduced recombination of electron-hole pairs, leading to accelerated photodegradation. The bandgap of the titania nanoparticles was reduced after efficient doping, enabling the photodegradation of malachite green under visible light illumination. The results of photocatalytic degradation were confirmed using spectroscopy and high-performance liquid chromatography coupled with mass spectrometry.
Article
Chemistry, Multidisciplinary
Rashed Aleisa, Ji Feng, Zuyang Ye, Yadong Yin
Summary: This study reports the synthesis of surface-functionalized N-doped TiO2 nanocrystals that rapidly change color from whitish to black under low-power irradiation and exhibit excellent color stability in atmospheric conditions. These nanocrystals show great potential for color-switching applications, especially in the development of rewritable paper with excellent writing and erasing reversibility.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Rudzani Ratshiedana, Olayemi Jola Fakayode, Ajay Kumar Mishra, Alex Tawanda Kuvarega
Summary: The study focuses on the impact of silver ion doping on the photocatalytic activity of titanium dioxide for the degradation of tartrazine. Results show that optimal degradation of tartrazine can be achieved with a certain amount of doping, suggesting potential applications for removing similar organic pollutants from water.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Physical
C. Gomez-Polo, S. Larumbe, A. Gil, D. Munoz, L. Rodriguez Fernandez, L. Fernandez Barquin, A. Garcia-Prieto, M. L. Fdez-Gubieda, A. Muela
Summary: The study investigates the effects of Cr and N doping on the properties of TiO2 anatase nanoparticles, including adsorption capacity, photocatalytic performance, and antibacterial response. Doping with Cr and Cr/N enhances adsorption capacity and photocatalytic performance, with Cr-TiO2 nanoparticles exhibiting antibacterial activity under visible light. The differences in electrostatic charge and nanoparticle dispersion are suggested as the main reasons for the varied antibacterial response among the doped nanoparticles.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Wu-Jhang Chen, Kuo-Chin Hsu, Te-Hua Fang, Tao-Hsing Chen, Ming-Hao Li
Summary: In this study, Ag or Al-doped TiO2/ZnO heterostructure nanocatalysts were prepared and their performance was evaluated for photocatalysis by degrading methylene blue. The results showed that Ag-doped TiO2/ZnO heterostructure nanocatalysts exhibited higher photocatalytic activity compared to pure TiO2, with a degradation efficiency 14% higher.
CURRENT APPLIED PHYSICS
(2022)
Article
Polymer Science
Humberto Alejandro Monreal Romero, Teresa Perez Pinon, Diana Sagarnaga, Raquel Duarte Rico, Alfredo Nevarez Rascon, Carlos Alberto Martinez Perez, Dagoberto Perez Pinon, Juan Pablo Flores de los Rios, Mario Sanchez Carrillo, Jose Guadalupe Chacon-Nava
Summary: In this study, titanium dioxide scaffolds were successfully synthesized using the sol-gel method. The scaffolds were formed by using titanium isopropoxide as a precursor and a polymeric network of galactopyranose as a template. The synthesized scaffolds have diameters of 50 nm and porosity ranging from 0.3 to 10 nm. XRD analysis confirmed the formation of crystalline phases in the TiO2 scaffold at 700 degrees C. The use of biological polymers as templates provides a low-cost and efficient approach for the synthesis of new materials.
Article
Materials Science, Multidisciplinary
C. Y. Ma, J. L. Wang, C. Leng, N. Zhou, F. W. Qin, Q. Y. Zhang
Summary: A modified photocatalyst constructed by combining nanoparticulate graphene oxide (GO)-TiO2 films with silver nanoparticles displayed significantly enhanced photocatalytic activity, potentially suitable for water purification.
Article
Environmental Sciences
Smitha Venu Sreekala, Athulya Parola, Vimala Thayumani, Harikumar Puthenveedu Sadasivan Pillai, Resmi Thoppil Ramakrishnan
Summary: In this study, silver and nitrogen-doped titanium dioxide coated chitosan nanocomposites were successfully synthesized and applied for the reduction of nitrates in water through adsorption and photocatalysis. The drying conditions of the nanocomposite beads were found to significantly affect their adsorption and photocatalytic efficiencies. The nanocomposite beads demonstrated high nitrate reduction efficiency and promising results in both continuous flow adsorption cum photocatalysis experiment and fixed-bed column adsorption experiment, indicating their potential for nitrate reduction from water and wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Umberto Belle, Daniela Spini, Barbara Del Curto, MariaPia Pedeferri, Maria Vittoria Diamanti
Summary: The environmental impact of industrial technologies and related remediation methods is a significant research area. In the development of materials for wastewater treatment or air purification, the use of hazardous reactants often diminishes the overall positive contribution to the environment. This study presents the synthesis of stable titanium dioxide (TiO2) sols using an environmentally friendly method. The sol was deposited on glass and evaluated for wastewater purification ability by photocatalytic degradation of organic dyes. The results showed high efficiency and reusability, with degradation rates exceeding 85% for Rhodamine B and 100% for Methylene Blue.
Article
Materials Science, Multidisciplinary
Mouna Khiari, Michael Lejeune, Mickael Gilliot, Florica Lazar, Aomar Hadjadj
Summary: The original technique developed in this study enables the direct and efficient incorporation of silver metal nanoparticles into ZnO precursor solution, resulting in nanocomposite thin films with a large effective surface area for interaction with the external environment and a large surface area for metal-semiconductor interaction suitable for surface photocatalysis reactions. These nanocomposites exhibit improved photocatalytic performance, stability, and reusability, making them promising for water treatment applications.
Review
Chemistry, Multidisciplinary
Cheng Chang, Saeed Rad, Lei Gan, Zitao Li, Junfeng Dai, Asfandyar Shahab
Summary: This review provides a comprehensive overview of the chemicals, reaction conditions, and procedures required for preparing nano TiO2 using the sol-gel method. It analyzes the influencing factors and their impact on the final product. This information is essential for controlling the properties of the resulting TiO2 gel/powder for targeted applications.
NANOTECHNOLOGY REVIEWS
(2023)
Article
Multidisciplinary Sciences
Mousab Salaheldeen Mirghani, Abdelbagi Osman
Summary: A modified sol-gel method was developed to synthesize pure and transition-metal-doped titanium dioxide, resulting in improved morphology and performance of the catalyst.
Article
Materials Science, Ceramics
Hugo Guimaraes Palhares, Eduardo Henrique Martins Nunes, Manuel Houmard
Summary: Most studies did not systematically evaluate textural and photocatalytic properties of TiO2-SiO2 composites. This work investigates the influence of heat treatment on the structural properties and photodegradation activity. Different prepared samples showed significant differences, but heat-treated samples had similar structures and properties, with some critical differences observed due to varying resistances to crystal growth.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ming-Yue Tan, Kah-Yoong Chan, Cheikh Zakaria Eldjilali, Abdelrahman Hamed Ebrahem Abdelhamed, Gregory Soon How Thien, Benedict Wen-Cheun Au, Boon Tong Goh, H. C. Ananda Murthy
Summary: This study presents a cost-effective and time-saving method for producing high-quality TiO2 electrochromic thin films using a sol-gel spin coating technique and rapid post-annealing. The successful deployment of TiO2 in electrochromic applications provides opportunities for integrating EC and photovoltaic technologies in energy-saving window glass applications.
Article
Chemistry, Applied
M. Ponce-Mosso, M. Perez-Gonzalez, P. E. Garcia-Tinoco, H. Crotte-Ledesma, M. Morales-Luna, S. A. Tomas
Article
Chemistry, Physical
M. Perez-Gonzalez, S. A. Tomas, J. Santoyo-Salazar, S. Gallardo-Hernandez, M. M. Tellez-Cruz, O. Solorza-Feria
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Applied
M. Perez-Gonzalez, M. Morales-Luna, J. Santoyo-Salazar, H. Crotte-Ledesma, P. E. Garcia-Tinoco, S. A. Tomas
Summary: The study investigated the influence of sputtering power, film thickness, and sputtering working pressure on the adsorption capacity and photocatalytic activity of MoO3 thin films. The results indicated that the samples deposited at 60 W and 12.0 mTorr with a thickness of 400 nm exhibited the maximum adsorption and photocatalytic performances. Raman spectroscopy and photoacoustic spectroscopy experiments confirmed strong MB adsorption on the film surface, with a hypsochromic shift indicating MB aggregation on the MoO3 surface.
Article
Chemistry, Applied
M. Perez-Gonzalez, S. A. Tomas
Summary: Photocatalytic Ag-loaded (TiO2)(0.95)-(ZnO)(0.05) thin films were successfully synthesized using the sol-gel dip-coating method, with the incorporation and surface diffusion of Ag confirmed by secondary ion mass spectrometry measurements. X-ray photoelectron spectroscopy revealed the chemical composition and electronic structure of the samples, confirming the presence of TiO2 and ZnO. The best response in photocatalytic activity was observed in the (TiO2)(0.95)-(ZnO)(0.05) thin films doped with 2 mol% Ag.
Article
Materials Science, Ceramics
Alexander N. Bondarchuk, Ivan Corrales-Mendoza, Josue A. Aguilar-Martinez, Sergio A. Tomas, Daniel A. Gomez-Caiceros, Arturo Hernandez-Mendez, Frank Marken
CERAMICS INTERNATIONAL
(2020)
Article
Chemistry, Physical
Idalia M. Sandoval-Jimenez, Damian Jacinto-Mendez, Liliana G. Toscano-Flores, Mauricio D. Carbajal-Tinoco
JOURNAL OF CHEMICAL PHYSICS
(2020)
Article
Engineering, Electrical & Electronic
Antonio Casillas-Zamora, Jose Trinidad Guillen-Bonilla, Alex Guillen-Bonilla, M. Rodriguez-Betancourtt, Y. L. Casallas-Moreno, Lorenzo Gildo-Ortiz, M. de la Luz Olvera-Amador, S. A. Tomas, Hector Guillen-Bonilla
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
Article
Materials Science, Multidisciplinary
Y. J. Acosta-Silva, A. Mendez-Lopez, F. De Moure-Flores, S. Tomas, R. Lozada-Morales, M. Melendez-Lira, O. Zelaya-Angel
Summary: The Cd1-xEuxS thin films exhibited complex changes in parameters such as interplanar spacing, crystal size, and vibrational modes at different Eu doping concentrations; the study on optical band gap and photoluminescence revealed significant influence of CdS lattice distortion caused by Eu doping on material properties.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Y. L. Casallas-Moreno, M. Ramirez-Lopez, G. Villa-Martinez, A. L. Martinez-Lopez, M. Macias, A. Cruz-Orea, G. Gonzalez de la Cruz, S. A. Tomas, P. Rodriguez-Fragoso, J. L. Herrera-Perez, J. G. Mendoza-Alvarez
Summary: The growth of InSbxAs1-x alloys on GaSb substrates with varying Sb mole fraction using LPE technique is investigated. Compared to alloy grown on p-type GaSb substrate, the one grown on n-type GaSb substrate shows higher crystalline quality and thermal properties. Raman scattering spectra indicate the improvement of crystalline quality with depth and identification of an intrinsic depletion region. Phonon-plasmon coupling and carrier concentration variations are observed in both n- and p-type GaSb substrates for InSbxAs1-x alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
D. A. Granada-Ramirez, A. Pulzara-Mora, C. A. Pulzara-Mora, A. Pardo-Sierra, A. Cardona-Bedoya, M. Perez-Gonzalez, S. A. Tomas, S. Gallardo-Hernandez, J. G. Mendoza-Alvarez
Summary: InGaN thin films were deposited on silicon substrates using RF magnetron sputtering, and the In content was controlled by adjusting the substrate temperature. The optical and structural properties of the films were analyzed, and it was found that the band gap energy increased with temperature.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Margarita L. Alvarado-Noguez, Ana E. Matias-Reyes, Mario Perez-Gonzalez, Sergio A. Tomas, Claudia Hernandez-Aguilar, Flavio A. Dominguez-Pacheco, Jesus A. Arenas-Alatorre, Alfredo Cruz-Orea, Mauricio D. Carbajal-Tinoco, Jairo Galot-Linaldi, Elizabet Estrada-Muniz, Libia Vega-Loyo, Jaime Santoyo-Salazar
Summary: In this study, Curcuma longa L. extract was used to synthesize and directly coat magnetite (Fe3O4) nanoparticles with a size of around 12 nm. The nanoparticles were then modified with a surface layer of polyphenol groups to enhance their bio-applications.
Article
Chemistry, Multidisciplinary
Ana E. Matias-Reyes, Margarita L. Alvarado-Noguez, Mario Perez-Gonzalez, Mauricio D. Carbajal-Tinoco, Elizabeth Estrada-Muniz, Jesus A. Fuentes-Garcia, Libia Vega-Loyo, Sergio A. Tomas, Gerardo F. Goya, Jaime Santoyo-Salazar
Summary: This study presents an alternative approach to directly synthesizing magnetite nanoparticles (MNPs) using natural sources such as grapes, blueberries, and pomegranates. The MNPs were synthesized using a modified co-precipitation method combined with phytochemical techniques, resulting in semispherical MNPs with a size range of 7.7 to 8.8 nm. The MNPs were coated with a thin layer of polyphenols, which demonstrated dual functionality as reducing agents and capping molecules. The structure and properties of the MNPs were analyzed, and their inductive heating and cell viability were assessed.
Article
Materials Science, Multidisciplinary
D. Castillo-Hernandez, M. Perez-Gonzalez, S. A. Tomas, J. L. Jimenez-Perez, J. F. Sanchez Ramirez, Z. N. Correa-Pacheco
Summary: This study reports on the detection of microbiological contamination in ancient books from the Franciscan Library of San Pedro Cholula in Mexico. Various fungi were found on the papers, and TiO2 nanoparticles synthesized by the sol gel process were effective in inhibiting their growth. The study proposes methodologies for the preservation of historical documents using sensitive techniques.
APPLIED MATERIALS TODAY
(2023)
Article
Nanoscience & Nanotechnology
Sandra Eguia-Eguia, Lorenzo Gildo-Ortiz, Mario Perez-Gonzalez, Sergio A. Tomas, Jesus A. Arenas-Alatorre, Jaime Santoyo-Salazar
Summary: This study evaluated the orientation of magnetic domains (MDs) in magnetite/maghemite nanoparticles coated with Gadolinium chelated with diethylenetriamine pentaacetate acid (Gd-DTPA). The results showed that the structure, particle size, composition, thickness, and interface defects play important roles in MDs orientation. Addressable and rotational features could potentially be utilized for inducing hydrogen proton alignment in water for various applications.
Article
Chemistry, Physical
D. A. Granada-Ramirez, J. S. Arias-Ceron, M. Perez-Gonzalez, J. P. Luna-Arias, A. Cruz-Orea, P. Rodriguez-Fragoso, J. L. Herrera-Perez, M. L. Gomez-Herrera, S. A. Tomas, F. Vazquez-Hernandez, A. A. Duran-Ledezma, J. G. Mendoza-Alvarez
APPLIED SURFACE SCIENCE
(2020)
