Article
Chemistry, Physical
Yan Bao, Ruyue Guo, Min Gao, Qiaoling Kang, Jianzhong Ma
Summary: A novel 3D hierarchical urchin-like SiO2@TiO2 sphere with hollow structure and anatase-rutile biphase was synthesized via solvothermal process, and the effects of calcination temperature on its photocatalytic activity were systematically studied. The 3D-UHSTs prepared at a calcination temperature of 700 degrees C exhibited higher photocatalytic activity due to electron transfer and reduced electron/hole recombination. The photocatalytic degradation of RhB followed first-order reaction kinetics, with a rate constant of 0.04654 min(-1).
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Yosep Han, Seungsoo Park, Seongmin Kim, Seongsoo Han, Youngjae Kim, Ho-Seok Jeon
Summary: A cost-effective method to produce TiO2 photocatalytic materials with enhanced activity was developed by synthesizing TiO2@C nanorod-aggregate catalysts with ultrahigh surface area and hierarchical pore structure from natural ilmenite using mechanical activation, annealing, HCl leaching, and calcination. The catalyst showed excellent adsorption capacity and stability under visible light irradiation, making it a promising candidate for industrial applications in degrading organic pollutants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Ceramics
Tingting Xiong, Yin Ye, Bin Luo, Liping Shen, Dongmei Wang, Meikun Fan, Zhengjun Gong
Summary: The 3D TA-TiO2-GA with network architectures and in situ growth of TiO2 NPs showed excellent photocatalytic performance and reusability in degrading organic contaminants. Mechanistic studies revealed the important roles of adsorption and photocatalysis, with superoxide radical anions and hydroxyl radicals as major reactive oxidative species. This study provides a novel alternative for solar light-driven environmental applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Xiaoqian Ai, Shun Yan, Ligang Ma
Summary: In this study, a hierarchical ZnO microsphere precursor was prepared using a hydrothermal method, and a controllable morphology ZnO catalyst was produced through annealing at different temperatures. The catalyst annealed at 400 degrees C showed the best photocatalytic activity for the degradation of dye molecules, and its structure was confirmed to be a 2D cellular network composed of two-dimensional nanosheets through electron microscopy measurements.
Article
Chemistry, Physical
Yuan Li, Guoshu Wang, Huigui Zhang, Wenyao Qian, Dongmei Li, Zhiqiang Guo, Ru Zhou, Jinzhang Xu
Summary: A novel photocatalyst TiO2/CNQDs-3 was constructed by forming heterojunction, which enhanced visible-light absorption capability and inhibited the recombination of photogenerated electron-hole pairs. The catalyst showed high efficiency and reaction rate constants in the photodegradation reaction.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Rekha B. Rajput, Rohidas B. Kale
Summary: In this study, a 3D hierarchical flower-like rutile TiO2 microsphere with well-aligned 1D nanorods was successfully synthesized using the solvothermal method. The synthesized TiO2 microspheres showed a average crystallite size of 6.9-8.4 nm and were composed of radially grown nanorods. Analysis confirmed the presence of titanium and oxygen peaks without impurity peaks. The volume ratio of water and toluene significantly affected the chemical properties of the synthesized TiO2 materials. The Ti(1:1) hierarchical 3D TiO2 microspheres exhibited a small crystallite size, a lower bandgap, a large BET surface area, and a high pore volume, indicating enhanced photocatalytic activity.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Physical
Chengzhang Zhu, Qiming Xian, Haiqian Yao, Chuanxiang Chen, Weixin Zou, Xiaoguang Duan, Zhifeng Jiang, Po Keung Wong
Summary: This study designed and constructed edge-rich bicrystalline 1T/2H-MoS2 nanosheet cocatalyst modified V-doped hierarchical TiO2 microspheres for the photocatalytic removal of oxytetracycline hydrochloride. The optimized VTM-5% heterojunction exhibited superior degradation efficiency due to enhanced light-harvesting capacity, rapid photogenerated charge transfer, and affinity to reactant molecules.
MATERIALS TODAY ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Zeineb A. Thiehmed, Talal M. Altahtamouni
Summary: In this study, the effect of KBr salt on the growth of TiO2 nanorods was investigated. The addition of KBr with different concentrations controlled the growth of TiO2 nanorods, with KBr molecules suppressing lateral growth and allowing for axial growth. This impacted the morphology and internal surface area of the nanorods.
Article
Nanoscience & Nanotechnology
Y. Sun, S. Xu, J. Y. Zeng, S. S. Yang, Q. R. Zhao, Y. Yang, Q. Zhao, G. X. Wang
Summary: TiO2 nanotubes were prepared using the hydrothermal method with P25 as the raw material. The study investigated the effect of hydrothermal duration and calcination temperature on the crystal structure and morphology of TiO2, with a focus on the photocatalytic activity. It was found that the calcination temperature significantly influenced the crystallinity and photocatalytic performance of TiO2 nanotubes, with the best activity observed at 750 degrees Celsius.
DIGEST JOURNAL OF NANOMATERIALS AND BIOSTRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Anna Stepanova, Teddy Tite, Iryna Ivanenko, Monica Enculescu, Cristian Radu, Daniela Cristina Culita, Arpad Mihai Rostas, Aurelian Catalin Galca
Summary: Photocatalysis using TiO2 has shown promising results in degrading harmful pollutants. This study synthesized TiO2 powders via a hydrothermal method and analyzed its morphology and structure using various analysis techniques. The results demonstrated that TiO2 exhibited excellent photocatalytic performance in degrading dyes, with pH affecting the formation of TiO2 phases.
Article
Chemistry, Physical
Xiaojing Lin, Mingxuan Sun, Bowen Gao, Wen Ding, Zihan Zhang, Sambandam Anandan, Ahmad Umar
Summary: A series of mixed-phases TiO2 were fabricated using a mild hydrothermal process, resulting in nanocrystals with different combinations of anatase, rutile, and brookite phases. While the triphase TiO2 showed the longest optical edge in UV-vis absorption spectroscopy, the diphase TiO2 exhibited higher degradation ratio of levofloxacin. This study provides insights into regulating the phase ratio of TiO2 for environmental remediation applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yonghui Zhang, Baoji Miao, Qiuling Chen, Zhiming Bai, Yange Cao, Basandorj Davaa
Summary: In this study, TiO2-montmorillonite (MMT) composites were synthesized hydrothermally under variable conditions, characterized, and evaluated for photocatalytic activity. The composite with a TiO2 mass ratio of 30 wt%, prepared at a pH of 6, a reaction temperature of 160 degrees C, and a dwelling time of 24 h showed the highest methylene blue removal efficiency of 95.6%.
Article
Chemistry, Physical
Zhipeng Ding, Mingxuan Sun, Wenzhu Liu, Xianglong Meng, Yongqiang Zheng, Wangbing Sun, Qinfeng Zhou
Summary: A collection of N-TiO2/delaminated N-Ti3C2 (NTTx) composites were designed and synthesized by one-step calcination of NH4Cl-Ti3C2 precursors. The composites showed higher photocatalytic performance under visible light irradiation, attributed to the decrease of band gap by N doping in TiO2 and the excellent electrical conductivity of N-Ti3C2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Praveen Kumar Lavudya, SuryaBindu Sesha Devarakonda, Harita Pant, Sarah Geo, Avijit Tudu, Vadali Venkata Satya Siva Srikanth, Rajanikanth Ammanabrolu
Summary: A microwave-assisted hydrothermal solution synthesis method was used to prepare 3D hierarchical flowery TiO2 microspheres quickly and without calcination. The microspheres showed crystallization in the anatase form and had many evenly distributed nm-thick petal-like features. The use of microwaves as an additional energy source accelerated the growth of the microspheres, which exhibited a large specific surface area and unique pore characteristics, making them suitable for photocatalysis with a high photodegradation efficiency.
Article
Biochemistry & Molecular Biology
Thomas Cadenbach, Valeria Sanchez, Daniela Chiquito Rios, Alexis Debut, Karla Vizuete, Maria J. Benitez
Summary: In recent years, there has been significant interest in semiconductor hollow spheres due to their unique combination of morphological, chemical, and physico-chemical properties. In this study, we successfully synthesized BiFeO3 hollow spheres for the first time using a hydrothermal treatment method, and systematically investigated the mechanism of their formation. The synthesized hollow spheres showed high catalytic activity in the photodegradation of Rhodamine B under visible-light irradiation, with complete degradation occurring in less than 150 min at neutral pH. The superior efficiencies of the synthesized material can be attributed to the unique features of hollow spheres, as confirmed by trapping experiments.
Article
Chemistry, Analytical
Yang Zhao, Fang Yuan, Xie Quan, Hongtao Yu, Shuo Chen, Huimin Zhao, Zhaoyang Liu, Nidal Hilal
ANALYTICAL METHODS
(2015)
Article
Chemistry, Multidisciplinary
Benny Yong Liang Tan, Jermyn Juay, Zhaoyang Liu, Darren Sun
CHEMISTRY-AN ASIAN JOURNAL
(2016)
Article
Engineering, Environmental
Siew Siang Lee, Hongwei Bai, Zhaoyang Liu, Darren Delai Sun
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2015)
Article
Engineering, Chemical
Benny Yong Liang Tan, Ming Hang Tai, Jermyn Juay, Zhaoyang Liu, Darren Sun
SEPARATION AND PURIFICATION TECHNOLOGY
(2015)
Article
Multidisciplinary Sciences
Detao Qin, Zhaoyang Liu, Darren Delai Sun, Xiaoxiao Song, Hongwei Bai
SCIENTIFIC REPORTS
(2015)
Article
Electrochemistry
Hongwei Bai, Xiaoli Zan, Zhaoyang Liu, Darren Delai Sun
Article
Biotechnology & Applied Microbiology
Guo Liu, Yaqi Zhou, Zhaoyang Liu, Junjie Zhang, Binbin Tang, Shaogui Yang, Cheng Sun
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2016)
Article
Chemistry, Multidisciplinary
Yuzhang Zhu, Wei Xie, Shoujian Gao, Feng Zhang, Wenbin Zhang, Zhaoyang Liu, Jian Jin
Article
Multidisciplinary Sciences
Detao Qin, Zhaoyang Liu, Hongwei Bai, Darren Delai Sun, Xiaoxiao Song
SCIENTIFIC REPORTS
(2016)
Article
Chemistry, Multidisciplinary
Kui Wang, Wubulikasimu Yiming, Jayaprakash Saththasivam, Zhaoyang Liu
Article
Chemistry, Physical
Detao Qin, Zhaoyang Liu, Hongwei Bai, Darren Delai Sun
JOURNAL OF MATERIALS CHEMISTRY A
(2017)
Article
Engineering, Environmental
Detao Qin, Zhaoyang Liu, Zhi Liu, Hongwei Bai, Darren Delai Sun
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2018)
Article
Chemistry, Multidisciplinary
Peng Gao, An Ran Li, Ming Hang Tai, Zhao Yang Liu, Darren Delai Sun
CHEMISTRY-AN ASIAN JOURNAL
(2014)
Article
Environmental Sciences
Rand Elshorafa, Jayaprakash Saththasivam, Zhaoyang Liu, Said Ahzi
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Chemistry, Multidisciplinary
Jayaprakash Saththasivam, Kui Wang, Wubulikasimu Yiming, Zhaoyang Liu, Khaled A. Mahmoud
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)