Article
Engineering, Chemical
Yuqian Zhang, Zhizhong Dong, Gang Xiong, Stephen D. Tse
Summary: Tungsten-doped titanium-dioxide nanoparticles are synthesized using a multiple-diffusion-flame burner, showing the effect of tungsten doping on the structure and properties of the nanoparticles. It is found that doping enhances the absorption ability of visible light.
Article
Engineering, Environmental
Hao Yuan, Haoran Sun, Yuxing Shi, Jiaxuan Wang, Ang Bian, Youyou Hu, Feng Guo, Weilong Shi, Xin Du, Zhenhui Kang
Summary: Researchers constructed a g-C3N4 system doped with carbon and loaded with carbon dots (CDs) to investigate the effect of trap states, revealing a 4-fold increase in H2 evolution efficiency compared to ordinary g-C3N4 during photocatalysis. The study provides insight into interfacial charge transfer and transport dynamics, which can guide the design and development of highly active carbon-based composite photocatalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Sushu Zhang, Li Zhang, Shun Fang, Jie Zhou, Jiajie Fan, Kangle Lv
Summary: Nonstoichiometric tungsten oxide (WO3-X) as a typical plasmonic semiconductor has unique properties and excellent photocatalytic performance, showing great potential in practical applications such as hydrogen evolution, nitrogen fixation, carbon dioxide reduction, and pollutant degradation. Through various synthesis methods and modification strategies, satisfactory performance of WO3-X photocatalyst can be achieved.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Physical
Shihu Ding, Peng Tan, Nuo Meng, Xuxin Cao, Wei Wang
Summary: This study successfully constructed a novel direct Z-scheme tungsten trioxide/nitrogen doped carbon dots (WO3/NCDs) heterojunction photocatalyst with significantly enhanced light-absorption and broad-response photocatalytic activity, achieving a degradation efficiency of 96.0% towards tetracycline within 1 hour.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
Mai Mersal, Gehad G. Mohamed, Abdallah F. Zedan
Summary: Alcohol oxidation is an important chemical reaction of interest in energy and industrial sectors. In this study, n-TiO2@WO3 heterojunction photocatalysts were prepared and their catalytic activity towards methanol oxidation under visible-light was investigated. The hybrid photocatalyst showed enhanced activity compared to pure counterparts.
Article
Materials Science, Ceramics
Yi Zong, Zixing Peng, Qian Dong, Wanbing Hu, Dandan Yang, Qianyi Guo, Zhiwu Chen, Guoping Dong
Summary: By doping tungsten, the specific surface area and photocatalytic performance of g-C3N4 material can be improved, and it shows excellent performance in the degradation of Rhodamine B and hydrogen evolution.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Environmental Sciences
Devagi Kanakaraju, Muhamad Akif Aizuddin Jasni, Andrea Pace, Muhamad Hazim Ya
Summary: The Cu/TiO2/FA composite was optimized for the removal of the model dye pollutant methyl orange under visible light irradiation using response surface methodology and Box-Behnken experimental design. The study considered three independent variables and achieved a 99.91% removal rate under the optimal operating conditions. The results support the hypothesis of a combined and synergic adsorption-photocatalytic degradation process for pollutant removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Chaehun Lim, Ha-Rim An, Seongmin Ha, Seongjae Myeong, Chung Gi Min, Hea-Jong Chung, Byoungchul Son, Chang-Yeon Kim, Ji-In Park, Hyeran Kim, Hyun Uk Lee, Young-Seak Lee
Summary: We propose an underwater plasma method to produce nanoporous N-doped TiO2 (N-TiO2) photocatalysts with high reactivity in the visible light range. The unique energy input of this technology enables the synthesis, crystallization, doping, and porosity of TiO2 within minutes. The resulting N-TiO2 demonstrates a nanoporous structure with doped N atoms, which leads to narrow bandgap, effective charge-carrier separation, and enhanced light absorbing ability. The N-TiO2 photocatalysts exhibit efficient photocatalytic activities and excellent antibacterial ability, making them suitable for environmental and biomedical applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jun Cai, Yi Xia, Ruiqi Gang, Sufang He, Sridhar Komarneni
Summary: This study demonstrates that tungsten doping can improve the photocatalytic activity of MoS2 by promoting the formation of sulfur defects. The doped MoS2 exhibits high removal efficiency of gaseous mercury and shows good stability, enhanced water and sulfur resistance under light illumination.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Gouranga Maharana, Reddivari Muniramaiah, J. Yuvashree, Diptendu Mandal, Supravat Mondal, M. Kovendhan, Jean Maria Fernandes, Gangalakurti Laxminarayana, D. Paul Joseph
Summary: This research utilized a co-doping strategy to modify the optoelectronic parameters of SnO2 thin films, and confirmed the success of doping and its effects through various analysis techniques.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Devagi Kanakaraju, Feniellia Diwvya anak Kutiang, Ying Chin Lim, Pei Sean Goh
Summary: This review primarily discusses and evaluates the recent progress in the modification of Ag/TiO2, focusing on co-doping with non-metals and transition metals and the synthesis strategies for engineering the materials. The effects of doping and co-doping on the induced chemical and physical properties, photocatalytic performance, stability, and recyclability aspects are highlighted. The potential improvement of Ag/TiO2 through the addition of green materials is also examined, and recommendations for further research opportunities, limitations, and challenges are suggested.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Physical
Zhao Mo, Zhihuan Miao, Pengcheng Yan, Peipei Sun, Guanyu Wu, Xingwang Zhu, Cheng Ding, Qiang Zhu, Yucheng Lei, Hui Xu
Summary: The ideal photocatalyst for photocatalytic water splitting should have strong light absorption, fast charge separation/transfer ability, and abundant active sites. Heteroatom doping offers a promising approach for optimizing photocatalytic activity. In this study, boron (B) and sulfur (S) dopants were simultaneously introduced into graphitic carbon nitride (g-C3N4) nanotubes using a supramolecular self-assembly strategy. The developed B and S co-doped g-C3N4 nanotubes exhibited outstanding photocatalytic performance, achieving a conversion rate of H2O to H-2 of 9.321 mmol g(-1)h(-1), with an external quantum efficiency of 5.3% under irradiation at λ = 420 nm. The introduction of B dopants facilitated H2O adsorption and interatomic electron transfer, while S dopants promoted the oxidation ability of g-C3N4 and inhibited recombination. Furthermore, the simultaneous introduction of B and S optimized the electronic and energy level structures of g-C3N4 for efficient charge transfer, ultimately maximizing photocatalytic performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Almudena Aguinaco, Beatriz Amaya, Milagrosa Ramirez-del-Solar
Summary: Fe3+-TiO2 thin films were successfully prepared using a sandwich approach, and their structural, morphological, optical, and photocatalytic properties were studied. The incorporation of Fe3+ altered the material properties to enhance photocatalytic activity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Miguel Diaz-Sanchez, Isabel Hernandez-Benitez, Diana Diaz-Garcia, Sanjiv Prashar, Santiago Gomez-Ruiz
Summary: In recent years, titanium dioxide has shown high photocatalytic effectiveness in various decontamination processes. This study found that modifying titanium dioxide with carbon species with high surface porosity can enhance its adsorption capacity and activation potential. The addition of different types of carbon materials enables efficient degradation of organic pollutants and catalytic reactions.
CATALYSIS COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Qian Liu, Kangping Cui, Minshu Cui, Xueyan Liu, Qiang Zhang
Summary: Carbon substitution of nitrogen greatly improved the pi-conjugated system of g-C3N4 and synergistically modulated its electronic structure with cyano, enhancing the photocatalytic activation towards peroxymonosulfate (PMS) by carbon and cyano co-doped g-C3N4 (C-CND). Both radicals and non-radicals play essential roles in the C-CND/PMS/Vis system, where 1O2 dominates. The activation mechanism was analyzed by adsorption calculations between PMS and C-CND in different electrostatic potential regions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Romeo Villarreal-Morales, Laura Hinojosa-Reyes, Aracely Hernandez-Ramirez, Edgar Ruiz-Ruiz, Maria de Lourdes Maya Trevino, Jorge Luis Guzman-Mar
Summary: In this study, an automated methodology was proposed for the determination of plasticisers in water samples collected from wastewater treatment plants. The methodology combined solid-phase extraction with high-performance liquid chromatography and ultraviolet detection. The selected preconcentration conditions and analysis parameters were optimized. The proposed methodology was successfully applied to detect Bisphenol A and 4-tert-butylphenol in water samples from two wastewater treatment plants.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Rafael Hernandez-Tenorio, Jorge Luis Guzman-Mar, Laura Hinojosa-Reyes, Norma Ramos-Delgado, Aracely Hernandez-Ramirez
Summary: This study implemented a highly selective and sensitive solid-phase extraction (SPE) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) analytical method to successfully detect and quantify emerging contaminants in hospital wastewater. The method exhibited good linearity, with correlation coefficients ranging from 0.991 to 0.999, and was successfully applied to analyze wastewater samples from a public hospital in Mexico.
JOURNAL OF THE MEXICAN CHEMICAL SOCIETY
(2021)
Article
Engineering, Electrical & Electronic
Khirbet Lopez-Velazquez, Jorge L. Guzman-Mar, Aracely Hernandez-Ramirez, Edgar Gonzalez-Juarez, Minerva Villanueva-Rodriguez
Summary: Fe-BiOBr-N photocatalyst co-doped with Fe and N was successfully synthesized and characterized, showing improved photocatalytic activity for BPA degradation compared to unmodified BiOBr. The incorporation of Fe and N in BiOBr resulted in a decrease in band gap, crystal size, and recombination rate of photogenerated charges, as well as an increase in specific surface area. Fe-BiOBr-N is a promising option for the effective elimination of persistent contaminants such as BPA in the aqueous medium under visible radiation.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
Raisa Estefania Nunez-Salas, Aracely Hernandez-Ramirez, Veronica Santos-Lozano, Laura Hinojosa-Reyes, Jorge Luis Guzman-Mar, Miguel Angel Gracia-Pinilla, Maria de Lourdes Maya-Trevino
Summary: FeTiO3/ZnO catalyst prepared by ultrasound-assisted chemical precipitation method showed promising photocatalytic performance, with FeTiO3/ZnO (1%wt.) exhibiting superior degradation of CPX compared to bare ZnO. Additionally, the heterostructured material demonstrated high stability and reusability over multiple cycles.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Materials Science, Ceramics
J. C. Murillo-Sierra, M. D. L. Maya-Trevino, R. E. Nunez-Salas, D. A. Pino-Sandoval, A. Hernandez-Ramirez
Summary: In this study, ZnS/WO3 coupled photocatalysts were synthesized and showed significantly improved catalytic activity compared to individual semiconductors. The ZnS5%/WO3 photocatalyst achieved complete degradation of SMX in 60 minutes. The enhancement was attributed to the reduced recombination rate.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Diego Alejandro Pino-Sandoval, Laura Hinojosa-Reyes, Jorge Luis Guzman-Mar, Juan Camilo Murillo-Sierra, Aracely Hernandez-Ramirez
Summary: This work evaluated the solar photocatalytic degradation of a drug mixture in different environments and studied the photocatalytic activity of two commercial catalysts. The results showed that solar photocatalysis can effectively degrade the drug mixture under suitable conditions.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Environmental Sciences
B. Mendoza-Reyes, S. Mendiola-Alvarez, J. L. Guzman-Mar, M. Villanueva-Rodriguez, E. J. Ruiz-Ruiz, L. Hinojosa-Reyes
Summary: This study investigated the photocatalytic degradation of the herbicide 4-chloro-2-methylphenoxyacetic acid using a composite catalyst FeOx-TiO2 under UV-Vis radiation and with the assistance of persulfate or peroxymonosulfate. The FeOx-TiO2 composite showed enhanced mineralization efficiency compared to other oxidation methods, resulting in complete elimination of the herbicide and its by-product 4-chloro-2-methyl phenol. The coupling of FeOx in TiO2 suppressed the recombination of electron/hole pairs and improved the visible light response.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Rafael Hernandez-Tenorio, Aracely Hernandez-Ramirez, Monika Moeder, Jorge Luis Guzman-Mar
Summary: This study investigated the removal of oxcarbazepine from water through photolysis and heterogeneous photocatalysis processes, and monitored the formation of transformation products. The results showed that oxcarbazepine was completely degraded within 30 minutes using both methods.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Valeria Garcia-Salcido, Paola Mercado-Oliva, Jorge Luis Guzman-Mar, Boris Kharisov, Laura Hinojosa-Reyes
Summary: Heterogeneous photocatalysis is an advanced oxidation process that generates reactive oxygen species by activating a catalyst under irradiation, considered one of the most viable treatment alternatives with various environmental applications. Recently, new visible-light active composite photocatalysts have been synthesized by incorporating metal-organic frameworks (MOFs) in semiconductors, reducing e(-)-h(+) recombination rate.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Polymer Science
Gabriela Pena-Velasco, Laura Hinojosa-Reyes, Aracely Hernandez-Ramirez, Ladislao Sandoval-Rangel, Jorge Luis Guzman-Mar
Summary: This study evaluated the use of acid-treated MIL-101(Fe) derived carbon material as an adsorbent for low concentrations of naproxen in an aqueous solution. The material showed improved textural and physicochemical properties, resulting in enhanced adsorption capacity compared to other materials. The adsorption process followed pseudo-second order and Langmuir models, and the thermodynamic parameters indicated spontaneous and exothermic adsorption. These findings highlight the potential application of acid-treated MIL-101(Fe) adsorbent for pharmaceutical compounds.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Gerardo E. Cordova-Perez, Jorge Cortez-Elizalde, Adib Abiu Silahua-Pavon, Adrian Cervantes-Uribe, Juan Carlos Arevalo-Perez, Adrian Cordero-Garcia, Alejandra E. Espinosa de los Monteros, Claudia G. Espinosa-Gonzalez, Srinivas Godavarthi, Filiberto Ortiz-Chi, Zenaida Guerra-Que, Jose Gilberto Torres-Torres
Summary: In this study, Ni supported nanocatalysts were prepared to convert levulinic acid into gamma-Valerolactone using methanol as solvent. The catalysts exhibited the highest activity with 5% W at pH 9, resulting in 80% yield after 24 hours of reaction.
Article
Chemistry, Physical
Laura Yanneth Ramirez-Quintanilla, Diego Pino-Sandoval, Juan Camilo Murillo-Sierra, Jorge Luis Guzman-Mar, Edgar J. Ruiz-Ruiz, Aracely Hernandez-Ramirez
Summary: B-TiO2 photocatalyst with 3 wt.% boron incorporation exhibited the best performance on the degradation and mineralization of estriol. It achieved complete degradation at 300 kJ/m(2) of accumulated energy and 71% of mineralization at 400 kJ/m(2) (2 h), resulting in a non-toxic effluent. The synthesized materials were characterized by various techniques including UV-Vis diffuse reflectance spectroscopy, X-ray diffraction, Raman spectroscopy, Scanning electron microscopy, and X-ray photoelectron spectroscopy.
Article
Environmental Sciences
Andrea Salazar-Garcia, Sagrario M. Montemayor, Jorge Luis Guzman-Mar, Bertha A. Puente-Urbina, Gilberto F. Hurtado-Lopez, Laura Hinojosa-Reyes
Summary: This study describes the rapid synthesis of carbon-based magnetic materials derived from cobalt and iron metal-organic frameworks (MOFs) through a microwave-assisted method followed by carbonization. C-ZIF-67 and C-MIL-100 (Fe) exhibited hierarchical porous structures and specific surface areas. The carbon-derived MOFs (CDMs) showed cobalt and iron species, which contributed to their magnetic behavior. The CDMs demonstrated high adsorption capacities for sulfadiazine (SDZ) and flumequine (FLU), and the adsorption process was thermodynamically favorable. Thus, C-ZIF-67 and C-MIL-100 (Fe) have potential as adsorbents for emerging pollutants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
