Article
Materials Science, Ceramics
E. Burak Ertus, Cekdar Vakifahmetoglu, Abdullah Oztuerk
Summary: The research found that porous glass embedded with titanium dioxide has a higher efficiency in methylene blue removal, mainly due to its high specific surface area and dispersion of nano-sized anatase TiO2 crystallites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Ying-jie Song, Hai-chao Li, Zi-wei Xiong, Long Cheng, Miao Du, Zun-qi Liu, Jun Li, De-qiang Li
Summary: This study used waste sawdust to prepare TiO2/C composites, which were used to effectively degrade methylene blue (MB) under simulated sunlight. The carbon component in the composite significantly enhanced sensitization, resulting in a wider visible light absorption and decreased charge recombination rate. The MB degradation efficiency reached nearly 100% within 30 minutes in the presence of TiO2/C composites, and the material showed sustained performance after multiple cycles. This green and low-cost preparation method offers a sustainable and efficient alternative to reduce the consumption of fossil resources.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Tianyu Yang, Yu Liu, Guangda Xia, Xiaodong Zhu, Yu Zhao
Summary: The utilization of the multilevel pore structure of natural wood for synthesizing titanium dioxide resulted in a material with improved adsorption and photocatalytic properties. Characterization using SEM, TEM, and X-ray diffraction revealed the presence of anatase and rutile phases in the prepared titanium dioxide.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Wei Gao, Yufeng Li, Jitao Zhao, Zhe Zhang, Weiwei Tang, Jun Wang, Zhenyu Wu
Summary: Reduced graphene oxide (rGO)/TiO2 nanocomposites, synthesized through a hydrothermal technique, were used as photocatalysts to effectively degrade methylene blue (MB) in industrial dyestuff wastewater. The degradation efficiency of the nanocomposites for MB was as high as 98.18% at 5wt.% rGO content, 0.4 g L-1 rGO/TiO2 content, pH 6, and 60 mg L-1 MB concentration. The photocatalytic degradation mechanism involved immediate oxidative degradation and the combined action of O-2(center dot-), OH(center dot), and h(+) species. The degradation kinetic of the nanocomposites for MB followed a first-order model under UV irradiation.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Chemistry, Inorganic & Nuclear
Abhishek Bhapkar, Rishi Prasad, Dipika Jaspal, Mandar Shirolkar, Kh. Gheisari, Shekhar Bhame
Summary: Zinc oxide nanoparticles were successfully synthesized using glycine nitrate solution combustion synthesis. The synthesized nanoparticles exhibited a pure hexagonal wurtzite-like structure of ZnO. They showed effective visible light catalytic activity in the degradation of methylene blue dye, degrading 98% of the dye in 120 minutes with 0.1 g/L of catalyst loading. Photoluminescence studies suggested that the enhanced photocatalytic activity may be attributed to the presence of singly ionized oxygen vacancy or intrinsic defects.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Arife Kubra Yontar, Suna Avcioglu, Sinem Cevik
Summary: The use of plant extract modified nanocomposite films is significant for sustainable and eco-friendly materials in environmental remediation. The modification with plant extracts can enhance the hardness and water absorption capacity of nanocomposite films, and significantly improve the photocatalytic activity.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Polymer Science
Ximena Jaramillo-Fierro, Sneyder Gaona, John Ramon, Eduardo Valarezo
Summary: In this study, GP and GTA geopolymeric materials were prepared and characterized. The compounds showed high adsorption capacity and photocatalytic activity for the degradation of MB dye. The incorporation of ZnTiO3/TiO2 in the geopolymeric matrix allowed GTA to achieve higher overall efficiency compared to GP, combining adsorption and photocatalysis. The synthesized compounds could be used for multiple cycles for the removal of MB from wastewater.
Article
Materials Science, Ceramics
Haibei Tan, Yabin Zhang, Bowen Li, Hao Yang, Haitao Hou, Qinglin Huang
Summary: A polymer-glass flat membrane was prepared using the phase inversion casting method and TiO2 was coated on the surface of the membranes. The membrane was characterized and its photocatalytic degradation of methylene blue was investigated. The results showed that the membrane coated by three layers TiO2 sol exhibited the best photocatalytic degradation performance for methylene blue.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Applied
Kejun Wu, Pankaj Koinkar, Akihiro Furube
Summary: By combining transition metal dichalcogenide WS2 and gold nanoparticles with titanium dioxide, the WS2/TiO2/Au composite showed enhanced photocatalytic performance under visible light, making it suitable for future photocatalytic applications.
MODERN PHYSICS LETTERS B
(2022)
Article
Materials Science, Ceramics
Rajmoni Basumatary, Bablu Basumatary, Dimpul Konwar, Anjalu Ramchiary
Summary: A Co-doped TiO2/CoTiO3 heterostructure photocatalyst was synthesized using a modified sol-gel route. Under visible light, the Co-TiO2/CoTiO3 (CT600) photocatalyst exhibited 97% degradation of methylene blue in 90 min, which is 42-fold higher than that of pristine TiO2. The presence of oxygen vacancies, charge carrier migration, and the chemical compositions of the photocatalysts were studied using ESR, PL, and XPS techniques.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Guanghui Li, Changye Mang, Lang Xing, Pengxu Cao, Yongfeng Cai, Jun Luo, Hao Jiang
Summary: In this study, a Mo-doped TiO2 photocatalyst CTAB-Mo-TiO2/FAC was prepared using a sol-gel method and modified with CTAB. The CTAB-Mo-TiO2/FAC showed low bandgap, strong light absorption ability, and wide absorption range. CTAB doping facilitated the incorporation of Mo6+ into the TiO2 lattice, causing crystal distortion and generating more oxygen vacancies, which enhanced the photocatalytic activity. The experimental results demonstrated that CTAB-Mo-TiO2/FAC exhibited the highest removal efficiency for MB under visible light irradiation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Ceramics
Deshan Cheng, Changwang Yan, Yuhang Liu, Yang Zhou, Dongdong Lu, Xiaoning Tang, Guangming Cai, Daiqi Li, Zhong Zhao, Xin Wang
Summary: The study explores the recycling of photocatalyst in wastewater treatment by loading copper ferrite particles onto polydopamine treated ceramic/polyester fabrics. The CPF/CuFe2O4 photocatalyst demonstrated excellent photocatalytic activity, photostability, and recoverability, showing great potential in wastewater treatment.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Ahmed Badreldin, Muhammad Danyal Imam, Yiming Wubulikasimu, Khaled Elsaid, Aya E. Abusrafa, Perla B. Balbuena, Ahmed Abdel-Wahab
Summary: This study reports the modification of V2O5 materials using photocatalysis technology to enhance visible light activity, resulting in high degradation efficiency for dye-type organic pollutants, and explores the mechanism behind the improvements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Mahdieh VafaeiAsl, Iman Keshavarz, Farzaneh Shemirani, Parastoo Jamshidi
Summary: This article investigates the photocatalytic performance of a nanocomposite, consisting of two nanocore-shell-nanoparticles, Fe3O4@SiO2 and WO3@TiO2, for degrading methylene blue (MB). The materials were prepared using environmentally-friendly reagents and energy efficient methods. The characterization of the materials was conducted using various techniques. The optimal conditions for methylene blue degradation were determined, and the nanocomposite showed good reusability and durability.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Chemistry, Physical
Aleksandra Babyszko, Agnieszka Wanag, Marcin Sadlowski, Ewelina Kusiak-Nejman, Antoni W. W. Morawski
Summary: This paper presents a modification of titanium dioxide with fumed silica and investigates the characteristics and photocatalytic activity of the materials. The results show that the presence of SiO2 effectively inhibits the increase in crystallite size and decrease in specific surface area during calcination. SiO2 also contributes to the increase in specific surface area and the change in band gap energy values. The photocatalytic activity of SiO2/TiO2 photocatalysts is higher compared to the starting TiO2, and it increases with the increase in SiO2 content.
Article
Chemistry, Physical
Amparo Fernandez-Perez, Veronica Rodriguez-Casado, Teresa Valdes-Solis, Gregorio Marban
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2017)
Article
Chemistry, Physical
Gregorio Marban, Luis A. Ramirez-Montoya, Hector Garcia, J. Angel Menendez, Ana Arenillas, Miguel A. Montes-Moran
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2018)
Article
Chemistry, Multidisciplinary
Alejandro Borras, Gil Goncalves, Gregorio Marban, Stefania Sandoval, Susana Pinto, Paula A. A. P. Marques, Julio Fraile, Gerard Tobias, Ana M. Lopez-Periago, Concepcion Domingo
CHEMISTRY-A EUROPEAN JOURNAL
(2018)
Article
Chemistry, Applied
Amparo Fernandez-Perez, Teresa Valdes-Solis, Gregorio Marban
Article
Chemistry, Applied
Amparo Fernandez-Perez, Gregorio Marban
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Alejandro Borras, Julio Fraile, Albert Rosado, Gregorio Marban, Gerard Tobias, Ana M. Lopez-Periago, Concepcion Domingo
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Chemistry, Physical
M. D. Casal, Gregorio Marban
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
(2020)
Article
Chemistry, Physical
Marta Kubovics, Albert Trigo, Antoni Sanchez, Gregorio Marban, Alejandro Borras, Javier Moral-Vico, Ana M. Lopez-Periago, Concepcion Domingo
Summary: A novel CuZnO multicomponent catalyst with reduced graphene oxide (rGO) as a support was synthesized. The CuZnO@rGO composite was prepared as a 3D aerogel through a two-step process using supercritical CO2 and H2 treatment. The composite catalyst exhibited increased methanol production compared to unsupported CuZnO nanoparticles and showed excellent MeOH selectivity at high temperature and low pressure.
Review
Geochemistry & Geophysics
Amalia Jimenez, Gregorio Marban, Ana Roza-Llera
Summary: This study investigates the transformation of iron-bearing precursors into jarosite-like minerals without the presence of bacteria or organic compounds. The composition of the solution determines the transformation, with crystallinity and long-term stability increasing as the temperature affects the kinetics of the process. Spectroscopic techniques were used to characterize the chemical species present on the mineral surfaces. Schwertmannite is the initial phase to precipitate, which transforms into a crystalline Na-rich member of the solid-solution family. The transformation involves dissolution-precipitation reactions within the nanoparticles of the secondary phase, with Fe3+ transferring from the solid to the solution. The crystal structure of jarosite-like minerals provides geochemical information about the aqueous solutions they were formed in. Temperature-transformation-time diagrams were established to define the reaction pathways.
AMERICAN MINERALOGIST
(2023)
Article
Chemistry, Multidisciplinary
Nuria Portoles-Gil, Silvia Gomez-Coca, Oriol Vallcorba, Gregorio Marban, Nuria Aliaga-Alcalde, Ana Lopez-Periago, Jose A. Ayllon, Concepcion Domingo
Article
Chemistry, Multidisciplinary
Amparo Fernandez-Perez, Gregorio Marban
Article
Engineering, Environmental
Amparo Fernandez-Perez, Gregorio Marban
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)
Article
Engineering, Environmental
Amparo Fernandez-Perez, Veronica Rodriguez-Casado, Teresa Valdes-Solis, Gregorio Marban
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2018)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)