Article
Chemistry, Multidisciplinary
Simin Yin, Shun Liu, Yongfeng Yuan, Shaoyi Guo, Zhaohui Ren
Summary: Octahedral shaped PbTiO3-TiO2 nanocomposites were successfully synthesized in this study, with an increased loading of TiO2 leading to a higher H-2 evolution rate, reaching up to 630.51 mu mol/h, which was 36 times higher than that of the octahedron substrate. The enhanced photocatalytic reactivity of the nanocomposites is attributed to the UV light absorption of the nanooctahedral substrates, efficient separation of photo-generated carriers via the interface and the reaction on the surface of the TiO2 nanocrystals.
Article
Chemistry, Physical
Kaiyue Zhang, Guilong Lu, Feng Chu, Xiubing Huang
Summary: The study investigates photocatalytic selective aerobic oxidation of amines to imines under visible light irradiation at specific temperatures using heterostructured TiO2(B)/anatase and Au/TiO2 nanobelts. It is found that the ligand-to-metal charge transfer effect between the surface amine substrate and metal can broaden visible-light absorption region. Pristine TiO2 achieves the best photocatalytic performance at 60 degrees C, while excessive Au NPs loaded on TiO2 inhibit the reaction process.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Shangchun Lv, Mengxi Pei, Yuxiang Liu, Zhichun Si, Xiaodong Wu, Rui Ran, Duan Weng, Feiyu Kang
Summary: TiO2 as a photocatalyst for water splitting has low efficiency due to narrow light absorbance, low charge separation efficiency, and rare surface active sites. This study loaded single atomic Ni (or Co) on the surface of anatase TiO2 nanosheets, forming a two-dimensional heterojunction, leading to high efficiency H-2 evolution reaction.
Article
Engineering, Chemical
Jiaxing Zhong, Yuanli Li, Hang Zhang, Shijie Li, Zaicheng Sun, Chunqiang Zhuang
Summary: In order to achieve rapid charge separation in photocatalytic reactions, large-sized porous carbon nanosheets with Pt dots were used as cocatalysts and coupled with TiO2 particles to construct photocatalytic systems. The optimized photocatalytic H-2 yield is about 108 times higher than that of TiO2, demonstrating the crucial role of large-sized porous carbon nanosheets with Pt dots in fast charge separation. The shift of the main peak in high-resolution X-ray photoelectron spectroscopies (XPS) confirms the electron transfer from TiO2 to porous carbon nanosheets. The dense distribution of photo-induced Pt deposition on porous carbon nanosheets confirms that the active centers for H-2 evolution are mainly located on porous carbon nanosheets. Our work demonstrates the feasibility of using large-sized conductive materials as cocatalysts for fast charge separation in photocatalytic reactions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Yong Li, Yanfang Liu, Mingqing Zhang, Qianyu Zhou, Xin Li, Tianlu Chen, Shifeng Wang
Summary: This study successfully prepared Ag3PO4/TiO2(B) heterojunction composite photocatalyst using the abundant solar energy resources in Tibet. By constructing heterojunctions, the light absorption range of the photocatalyst was extended, inhibiting the recombination of photogenerated electron-hole pairs and greatly enhancing its light quantum efficiency.
Article
Chemistry, Multidisciplinary
Pu Zhang, Xiaoyu Sui, Ying Wang, Zhuan Wang, Jiwu Zhao, Na Wen, Hailong Chen, Haowei Huang, Zizhong Zhang, Rusheng Yuan, Zhengxin Ding, Wenxin Dai, Xianzhi Fu, Yu-Xiang Weng, Jinlin Long
Summary: A series of novel surface Ru-H bipyridine complexes-grafted TiO2 nanohybrids were prepared for CO2 photocatalytic conversion to CH4 using H2 as electron and proton donors. The selectivity towards CH4 was significantly increased by ligand exchange with the surface Cp-RuH complex, resulting in a 4.4-fold enhancement in CO2 methanation activity. The optimal photocatalyst achieved an impressive CH4 production rate of 241.2 μL•g-1•h-1. Femtosecond transient IR absorption results showed the rapid injection of hot electrons into the conduction band of TiO2 nanoparticles, forming a charge-separated state responsible for CO2 methanation. The formation of CO2•- radicals through single electron reduction of CO2 molecules adsorbed on surface oxygen vacancies of TiO2 nanoparticles was identified as the critical step for the methanation, followed by insertion of radical intermediates into the explored Ru-H bond to generate Ru-OOCH species and ultimately CH4 and H2O in the presence of H2.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Cong Fu, Lingfang Liu, Zhaorui Li, Yaxiong Wei, Weixin Huang, Xiaojun Zhang
Summary: Artificial photosynthesis of H2O2 by TiO2-based semiconductors is a promising approach for H2O2 production. The synergy between bulk and surface defects on TiO2 can overcome limitations in efficiency due to rapid charge separation and low O-2 adsorption capacity. This work provides new insights into the mechanism of surface/bulk defects in photocatalysis and highlights the potential of surface/bulk regulation for achieving efficient photocatalytic conversion.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Guojing Wang, Tao Chen, Shuo Liu, Fengqi Wang, Mingyang Li, Mingzheng Xie, Jing Wang, Yunjie Xiang, Weihua Han
Summary: By loading TiO2 nanoparticles onto MnO2 nanosheets to form a nanostructured heterojunction, the separation/transfer efficiency of photocarriers and the solar absorptivity were improved, enhancing the solar energy conversion efficiency. The enhanced carrier transfer efficiency and visible absorption can be attributed to the 2D network of MnO2 and narrowed bandgap, leading to an increased H-2 production rate and improved photocatalytic properties.
DALTON TRANSACTIONS
(2021)
Article
Geochemistry & Geophysics
G. Gayathri, Joyce Q. D'Souza, Nalini G. Sundaram
Summary: The study investigated the use of a TiO2-H-beta (THB) zeolite composite photocatalyst for the degradation of caffeine, a persistent organic pollutant (POP). The THB composite exhibited excellent activity for the degradation of caffeine, with a degradation efficiency of 96%. The results highlight the effectiveness of the H-beta zeolite as a support for TiO2, improving the photocatalytic activity and suggesting potential application for the degradation of other POPs.
Article
Energy & Fuels
Shanshan Qin, Nikita Denisov, Johannes Will, Jan Kolarik, Erdmann Spiecker, Patrik Schmuki
Summary: Removing non-active Pt SAs on TiO2 by cyanide leaching dramatically increases the co-catalytic activity of remaining Pt SAs, achieving a remarkable turnover frequency of 4.87 x 10(5) h(-1) for H-2 evolution.
Article
Chemistry, Physical
Jun-Li Chen, Ming-Ming Liu, Shi-Yu Xie, Li-Juan Yue, Fei-Long Gong, Kai-Ming Chai, Yong-Hui Zhang
Summary: Cu2O/TiO2 heterogeneous materials were prepared via simple hydrothermal and physical mixing processes to study their photocatalytic H-2 production performance. The CT-70 (70 wt% of TiO2) showed superior photocatalytic activity with H-2 production of 8.33 mmol g(-1) in 6 h, significantly outperforming Cu2O and TiO2. The enhancement of H-2 generation was attributed to the proper band gap structure and heterojunction between Cu2O and TiO2. This work provides a strategy for preparing composite materials with high photocatalytic activity.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Jinfeng Liu, Ping Wang, Jiajie Fan, Huogen Yu, Jiaguo Yu
Summary: This study introduces a novel approach to enhance the photocatalytic activity for hydrogen evolution by introducing MoC into Mo2C to form carbon-modified nanoparticles, which are eventually coupled with TiO2 through electrostatic self-assembly. The results show that the carbon layer and hetero-phase MoC-Mo2C structure significantly improve the H2 generation rate, leading to a high-efficiency TiO2/MoC-Mo2C@C photocatalyst.
Article
Materials Science, Multidisciplinary
Fatemehsadat Moosavi, Alex Lemarchand, Cyrille Bazin, Maria Konstantakopoulou, Mathieu Fregnaux, Christophe Colbeau-Justin, Touraj Tavakoli Gheinani, Andrei Kanaev, Mehrdad Nikravech
Summary: Nanocomposite TiO2 coatings with mixed anatase-rutile crystalline polymorphs and strong adherence to glass substrates were prepared using a spray-plasma deposition method. The coating exhibited enhanced photocatalytic activity for cefixime antibiotic decomposition under UVA light illumination, and the activity significantly increased after the formation of the rutile phase, suggesting a synergistic effect of the two-component solids.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Xinru Li, Nan Sun, Yaoning Bai, Yuwei Yan, Taoyuan Ouyang, Xu Wang, Xiaodi Jiang, Zichen Wang, Xiaoming Cai, Jinming Cai, Honglin Tan
Summary: In this study, silver nanoparticles of two different sizes were prepared and compounded with semiconductor materials, demonstrating the photocatalytic enhancement of the system. It was found that the hydrogen yield was almost unaffected by the silver core diameter and the hydrogen production rate was essentially the same. Additionally, the rate of hydrogen precipitation in air for 9 months was significantly higher than previous studies, providing a new idea for the study of oxidation resistance and stability of photocatalysts.
Article
Chemistry, Physical
Yaqian He, Pengfei Li, Wenning Liu, Li An, Dan Qu, Xiayan Wang, Zaicheng Sun
Summary: This study found that the rate of hydrogen generation from seawater is lower compared to fresh water, with CO32- identified as a key factor affecting the generation rate. Excluding CO32- from the simulated seawater can recover the hydrogen generation rate to 85%. The research also revealed that CO32- and SO42- can affect the surface potential of TiO2, leading to a decrease in hydrogen production rate.
Article
Materials Science, Multidisciplinary
Shi-Chao Wang, Xiao-Hu Wang, Gao-Qun Qiao, Xiao-Yan Chen, Xin-Zhen Wang, Nan-Nan Wu, Jian Tian, Hong-Zhi Cui
Summary: A three-dimensional hierarchical ZnO structure modified with ultrafine NiO particles was synthesized successfully, exhibiting excellent isopropanol sensing properties. The Ni:Zn atomic ratio of 7.42:100 was found to be optimal for enhancing gas sensing performance. The composite showed high selectivity and sensitivity, fast response rate, low operating temperature, and a wide sensing range to isopropanol.
Article
Engineering, Environmental
Chaoqun Ma, Da Liu, Yanli Zhang, Jin Yong Lee, Jian Tian, Bingping Liu, Shihai Yan
Summary: This study presents a highly efficient electrocatalyst Fe2O3@-MoS2 for electrochemical ammonia synthesis (EAS) at ambient conditions. The Fe2O3@-MoS2 catalyst demonstrates remarkable ammonia yield and high faradaic efficiency, along with superior electrochemical stability. Density functional theory (DFT) calculations reveal that Fe2O3@-MoS2 is capable of activating inert N-2 molecules more effectively than MoS2.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xiang Liu, Xinglong Han, Zhangqian Liang, Yanjun Xue, Yanli Zhou, Xiaoli Zhang, Hongzhi Cui, Jian Tian
Summary: The P-1T-MoS2@N-g-C3N4 composite exhibits a higher photocatalytic N2 reduction rate and fixation efficiency compared to other materials, attributed to its high light absorption capacity, promotion of 1T-MoS2 conversion, and abundance of active sites.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yichen Guo, Zhangqian Liang, Yanjun Xue, Xinyu Wang, Xiaoli Zhang, Jian Tian
Summary: In this study, rod-shell nanostructures (CdS/Cu2S) were constructed by growing Cu2S as the outer shell on CdS nanorods, resulting in significantly enhanced hydrogen production activity. The improved photocatalytic performance of CdS/Cu2S rod-shell nanostructures is attributed to the structural design facilitating electron transfer and the broadened light absorption range achieved by Cu2S outer shells. This work provides insight into the design of rod-shell structured photocatalysts for efficient solar energy conversion.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yanjun Xue, Xinyu Wang, Zhangqian Liang, Xiaoli Zhang, Jian Tian
Summary: This study demonstrated the synthesis and performance of a 1T'-MoS2/CNNC composite for enhancing photogenerated carrier separation efficiency and N2 fixation. The composite showed significantly improved photocatalytic activity compared to pure CNNCs and other catalysts, guiding the design of efficient N2 fixation photocatalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Pengyuan Qiu, Ruhao Hu, Xinyu Wang, Yanjun Xue, Jian Tian, Xiaobo Chen
Summary: Co-doped Mo5N6 nanosheets were found to enhance the photocatalytic H-2 evolution of g-C3N4 nanosheets, achieving a higher hydrogen production rate and lower energy demand.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Engineering, Environmental
Xiaoyue Chen, Chaoqun Ma, Zixuan Tan, Xu Wang, Xiu Qian, Xiaoli Zhang, Jian Tian, Shihai Yan, Minhua Shao
Summary: This study synthesized one-dimensional screw-like MoS2 nanosheets with oxygen partially replacing sulfur as an efficient non-noble metal electrocatalyst for NRR, achieving excellent performance in a 0.1 M HCl solution. The unique structure and oxygen substitution show promising potential for the rational design of non-precious metal-based NRR electrocatalysts.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Yuying Wang, Xinyu Wang, Yinghong Ji, Ruiming Bian, Jiayu Li, Xiaoli Zhang, Jian Tian, Qingfeng Yang, Feng Shi
Summary: The Ti3C2 MXene@CdS nanoflower composite was synthesized, combining 2D Ti3C2 MXene and 3D CdS nanoflowers, which showed improved performance and photocatalytic activity for CdS.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Mengting Liu, Jiayu Li, Ruiming Bian, Xinyu Wang, Yinghong Ji, Xiaoli Zhang, Jian Tian, Feng Shi, Hongzhi Cui
Summary: In this study, a ZnO@Ti3C2 MXene composite was prepared by a simple hydrothermal method to enhance the photocatalytic degradation ability of methylene blue (MB). The experimental results showed that the ZnO@Ti3C2 MXene composite exhibited the best photocatalytic performance when the addition amount of Ti3C2 MXene was 50%, and it also showed good stability. The photocatalytic mechanism of the ZnO@Ti3C2 MXene composite was proposed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Shaowen Wu, Guanrui Ji, Peng Qiu, Qianqian Hu, Jian Tian, Yuanzhi Li
Summary: Solar-energy-driven CO2 reduction using NiCo@MgO/MgO composite enables high production rates of fuel and efficient solar-to-fuel conversion. The success lies in efficient light-thermal conversion and photoactivation, as well as the inhibition of CO disproportionation and acceleration of carbon species oxidation.
Article
Materials Science, Multidisciplinary
X. Wang, Y. Xue, Z. Liang, J. Tian, X. Zhang, X. Chen
Summary: In this study, semi-metallic 1T' phase rhenium disulfide nanosheets were loaded on graphitic carbon nitride nanotubes as cocatalysts to achieve efficient photocatalytic hydrogen production. The prepared 1T'-ReS2/g-C3N4 composites exhibited significantly enhanced photocatalytic activity, indicating promising potential for practical applications.
MATERIALS TODAY ADVANCES
(2022)
Article
Chemistry, Physical
Ya Xiong, Teng Liu, Xinyu Wang, Wendi Liu, Yanjun Xue, Xiaoli Zhang, Can Xiong, Jian Tian
Summary: By designing a novel step-scheme 2D CdS/W18O49 heterostructure, the problem of severe photo-corrosion and rapid recombination of electrons and holes in ultrathin CdS nanosheets for photocatalytic hydrogen evolution has been solved. The resulting 40 wt% CdS/W18O49 (CW40) exhibits a prominent photocatalytic H-2 production rate and high apparent quantum efficiency, and it can protect CdS from photo-corrosion, showing outstanding stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Ya Xiong, Wendi Liu, Kechen Wu, Teng Liu, Yanmei Chen, Xinzhen Wang, Jian Tian
Summary: The synthesis of ultrathin defective Co3O4/MoS2 nanosheets with large heterointerfaces and high specific surface area has been successfully achieved, and they exhibit excellent gas sensing performances including high response value, selectivity, and long-term stability. The presence of rich defects and intimate interfacial electronic interaction in the Co3O4/MoS2 nanosheets enables abundant active adsorption sites and rapid electrons transfer, contributing to their superior gas sensing properties. The versatile integration strategy demonstrated in this study provides potential for innovative applications in the field of gas sensing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Zhangqian Liang, Yanjun Xue, Xinyu Wang, Xiaoli Zhang, Jian Tian, Hongzhi Cui
Summary: 2D-layered graphitic carbon nitride (g-C3N4) is a promising photocatalyst for H2 generation, but its efficiency is limited by the recombination of photocarriers. Cobalt sulfide (CoS2) as a cocatalyst effectively promotes g-C3N4 nanosheets (NSs) for efficient H2 generation. The CoS2/g-C3N4 hybrids exhibit highly boosted photocatalytic performance and outstanding stability, with an improved H2 generation rate of 36.2 μmol-1 h-1, 180 times higher than bare g-C3N4. The CoS2 loading enhances the photocatalytic activity of g-C3N4 for H2 evolution due to lower overpotential and smaller Co-H bond activation energy.
NANO MATERIALS SCIENCE
(2023)
Article
Chemistry, Applied
Xiu Qian, Yanjiao Wei, Mengjie Sun, Ye Han, Xiaoli Zhang, Jian Tian, Minhua Shao
Summary: In this study, TiO2 nanosheets (NSs) grown on highly conductive Ti3C2Tx MXene were proposed to achieve electrocatalytic NH3 synthesis. Ti3C2Tx MXene promoted electron transfer, while in-situ formation of TiO2 NSs prevented stacking and increased surface area. The TiO2/Ti3C2Tx MXene catalyst exhibited high efficiency and strong electrochemical durability, with the nitrogen in the produced NH3 originating from the electrolyte's N2.
CHINESE JOURNAL OF CATALYSIS
(2022)
