Article
Chemistry, Physical
Cong Fu, Fei Li, Jianlong Yang, Jijia Xie, Yunshang Zhang, Xiao Sun, Xusheng Zheng, Yuanxu Liu, Junfa Zhu, Junwang Tang, Xue-Qing Gong, Weixin Huang
Summary: It is found that uniform anatase TiO2 nanocrystals predominantly enclosed with the {001} facets exhibit high activity in photocatalytic catalyzing methane combustion. The valence band maximum and conduction band minimum were found to locate separately for TiO2-{001} nanocrystals terminated with the reconstructed (001)-(1 x 4) surface, at the surface and in the bulk, respectively. The photocatalytic methane reaction rate is about 6 and 7 times higher compared to TiO2 nanocrystals predominantly enclosed with the {100} facets or with the {101} facets. This high activity is mainly attributed to the spontaneous bulk-surface charge separation and subsequent facile interfacial hole transfer from TiO2(001) surface to adsorbed methane.
Review
Materials Science, Multidisciplinary
Guanxing Li, Ke Fang, Yang Ou, Wentao Yuan, Hangsheng Yang, Ze Zhang, Yong Wang
Summary: The anatase TiO2 (001) surface, known for its excellent performance, undergoes reconstruction to a (1 x 4)-(001) surface due to its high reactivity, potentially altering its properties. Recent advances in surface science have elucidated the intrinsic physical and chemical properties of this surface. Studying the structure, formation mechanism, stability, and surface chemistry of the reconstructed TiO2 (001) surface is crucial for understanding its behavior.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Min Chen, Jianhua Chen, Chuncheng Chen, Changbin Zhang, Hong He
Summary: The research shows that CuOx-rutile is more suitable for the oxidation of ammonia gas under visible light compared to CuOx-anatase, contrary to previous beliefs. Further analysis revealed that the interaction between CuOx and TiO2 differs significantly in different crystal phases, resulting in distinct directions of charge transfer.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Chunyan Wang, Xin Kang, Jiancong Liu, Dongxu Wang, Nan Wang, Jie Chen, Jing Wang, Chungui Tian, Honggang Fu
Summary: In this study, ultrathin black TiO2 nanosheet-assembled microspheres with high thermal stability were prepared using small amine molecules as protective agents. The hydrogenation treatment resulted in surface Ti3+ and bulk oxygen vacancies, narrowing the bandgap and extending the photoresponse from UV to visible-light region. The black TiO2 nanosheet-assembled microspheres exhibited an excellent solar-driven photocatalytic hydrogen evolution rate, which is attributed to their high specific surface area and efficient hydrogenation.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Gaomin Ning, Yan Zhang, Chunjing Shi, Chen Zhao, Mengmeng Liu, Fangfang Chang, Wenlong Gao, Sheng Ye, Jian Liu, Jing Zhang
Summary: Engineering the surface structure of semiconductor is a promising strategy for improving charge separation and transfer efficiency in photocatalysis. In this study, C decorated hollow TiO2 photocatalysts (C-TiO2) were designed and fabricated. The optimal C content and Ti-O-C bonds in C-TiO2 were found to enhance light absorption and promote charge separation and transfer, leading to a 5.5-fold higher activity in H2 evolution compared to TiO2. This work provides a feasible strategy for rational design and construction of surface-engineered hollow photocatalysts to enhance photocatalytic performance.
Article
Chemistry, Physical
Shengyu Zhang, Gongxin Zhang, Shuangzhi Wu, Zhongjie Guan, Qiuye Li, Jianjun Yang
Summary: Integration of photothermal materials and photocatalysts can effectively improve photocatalytic hydrogen production. This study constructed a Co3O4@ZnIn2S4 (ZIS) core-shell heterojunction as a photothermal/photocatalytic integrated system for photocatalytic hydrogen production. The synergy of photothermal effect and heterojunction significantly enhanced the photocatalytic performance of Co3O4@ZIS, achieving a highest hydrogen evolution rate of 4515 μmol.g(-1).h (-1), which is about 3.5 times higher than that of pure ZIS. This work provides a comprehensive perspective on the integrated concept of photothermal/photocatalysis for solar hydrogen production.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Wenbin Jiang, Hongyi Loh, Beverly Qian Ling Low, Houjuan Zhu, Jingxiang Low, Jerry Zhi Xiong Heng, Karen Yuanting Tang, Zibiao Li, Xian Jun Loh, Enyi Ye, Yujie Xiong
Summary: This article reviews the progress in oxygen vacancy engineering for photocatalytic CO2 reduction, including synthesis, characterization, and recent advancements. The roles of oxygen vacancy in light absorption, charge separation, and surface CO2 conversion are discussed in detail. The challenges and opportunities of engineering oxygen vacancy in metal oxide-based photocatalysts for efficient CO2 reduction are also addressed.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Wutao Yang, Mingxia Li, Kai Pan, Liping Guo, Jiaxing Wu, Zhijun Li, Fan Yang, Kuo Lin, Wei Zhou
Summary: One-dimensional mesoporous anatase TiO2 nanotubes with engineered surface defects were fabricated using a solvothermal synthesis and high-temperature surface hydrogenation strategy, resulting in a significant decrease in bandgap and enhanced photoresponse to visible-light region. The defective nanotubes exhibited excellent photocatalytic hydrogen evolution rate due to efficient spatial charge separation and abundant surface active sites.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
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
Energy & Fuels
Jinyan Xiong, Xueteng Zhu, Zhangjing Chen, Yinan Ren, Weiming Wang, Chao Han, Weijie Li, Shaozhong Li, Gang Cheng
Summary: In this study, a defective amine silver species-modified mesoporous TiO2 nanoparticle assembly was reported for photocatalytic CO2 reduction. The results showed that this material can enhance the photocatalytic conversion of CO2 into CH4 and CO.
Article
Materials Science, Multidisciplinary
Guangri Jia, Ying Wang, Xiaoqiang Cui, Hengzhong Zhang, Jingxiang Zhao, Lu Hua Li, Lin Gu, Qinghua Zhang, Lirong Zheng, Jiandong Wu, Qiong Wu, David J. Singh, Weiwei Li, Lei Zhang, Weitao Zheng
Summary: The introduction of hydrogen into TiO2 greatly enhances its photocatalytic properties, leading to a 60 times enhancement of photocatalytic hydrogen evolution activity. Hydrogenated TiO2 with switchable defects is synthesized through a one-step wet-chemistry method and controlled annealing. The obtained hydrogenated TiO2 exhibits improved visible light absorption and efficient separation of photogenerated carriers, resulting in significantly enhanced photocatalytic activity.
Article
Chemistry, Physical
Longxiao Yang, Ningdong Feng, Feng Deng
Summary: In this study, Al-doped TiO2 photocatalysts with optimized {001} facet structure were prepared, showing significantly enhanced photocatalytic performance. The formation of F-Ti2Al structure was confirmed by NMR and ESR experiments, and it was identified as the active site responsible for the improved photocatalytic performance.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Chemistry, Multidisciplinary
Sen Lin, Hongwei Huang, Tianyi Ma, Yihe Zhang
Summary: This review systematically summarizes and introduces the research on photocatalytic O-2 evolution, covering principles, classical water oxidation photocatalysts, and strategies for activity improvement. It aims to provide timely guidance for future research on O-2 evolution.
Article
Chemistry, Physical
Jinyuan Zhang, Peipei Sun, Zhao Mo, Xianglin Zhu, M. D. Shouquat Hossain, Guanyu Wu, Zhihuan Miao, Pengcheng Yan, Zhigang Chen, Hui Xu
Summary: In this work, Mn-Cd dual-metal photocatalyst was synthesized and the effects of different proportions of bimetals on hydrogen production activity were studied. The ingenious design of the bimetallic sites led to significant improvement in the photocatalytic hydrogen production performance of MCS0.19.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Shuying Wang, Kentaro Teramura, Takashi Hisatomi, Kazunari Domen, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka
Summary: Loading Ag and Co dual cocatalysts on Al-doped SrTiO3 led to a significantly improved CO-formation rate and high selectivity toward CO evolution when irradiated with light. The cocatalysts acted as reduction and oxidation sites for promoting CO and O-2 generation on the surface of Al-SrTiO3.
Article
Chemistry, Multidisciplinary
Yuhao Chu, Chaofan Zhang, Xi Chen, Xue Li, Nanqi Ren, Shih-Hsin Ho
Summary: In recent years, the use of microalgae for the bioremediation of pharmaceuticals has gained attention. While most studies have focused on the removal performance of microalgae, their defensive response to pharmaceuticals during wastewater treatment has been overlooked. This study investigated the defensive systems of microalgae in synthetic wastewater and found that pharmaceuticals could bind to EPS, alleviating their direct toxicity to microalgae. Physiological analyses showed increased activity of antioxidant enzymes, suggesting a reduction in oxidative stress. Additionally, enzyme activities related to biotransformation and detoxification were upregulated, indicating the potential for the degradation and transformation of pharmaceuticals in microalgae.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Physical
Yichuan Wang, Zeyue Wei, Xuanyu Zhang, Weixin Huang
Summary: A series of heteropoly acids were prepared for the oxidation of isobutane to MAA. Cs2.23Cu0.26V0.38PMo12O40 catalyst showed a 20% conversion of isobutane and a 51% selectivity for MAA at 335 degrees C, resulting in a MAA yield of 0.68 mmol(MAA)center dot h(-1)center dot g(catalyst)(-1). The mobility of lattice oxygen and the acidity of the catalysts played crucial roles in the selective oxidation process.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Yunshang Zhang, Aiping Jia, Zhaorui Li, Zhenxuan Yuan, Weixin Huang
Summary: The morphology of the TiO2 support strongly influences the interfacial catalysis of Pt-TiO2 for the water-gas shift (WGS) reaction. Pt/TiO2{001} catalyst exhibits fewer surface oxygen vacancies and consequently active Pt-Ov,TiO2 interfacial ensemble sites compared to Pt/TiO2{100} and Pt/TiO2{101} catalysts, resulting in lower catalytic activity.
Article
Chemistry, Physical
Chu Wang, Yuanxu Liu, Yangyang Li, Xiao Sun, Leiming Xu, Weixin Huang
Summary: Developing facile photocatalysts with high activity and stability is a promising strategy for tetracycline degradation. The well-designed photocatalysts prepared via facile Ar atmosphere calcination with H-titanate nanotubes as precursors showed excellent visible light behavior by utilizing suitable oxygen vacancies (Ti3+ sites) as charge carrier traps. The efficient photocatalytic efficiency for TC degradation demonstrated significant activity of both h(+) and center dot O-2(-) under visible light irradiation.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
Hui Zhou, Dong Wang, Xue-Qing Gong
Summary: By performing density functional theory calculations, it was found that the composite catalysts of inverse CeOx/Cu(111) can produce more active hydride species compared to CeO2 or Cu alone. This is mainly due to the efficient combination of the unique structural feature of CeOx islands and the electronic promotion from Cu. Additionally, modifying the Cu(111) surface with pyridine molecules can enhance the thermo- and dynamical stabilities of the hydride species.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yan-Ping Zhang, Zi-Xiang Su, He-He Wei, Zhi-Qiang Wang, Xue-Qing Gong
Summary: In this study, the researchers systematically investigated the oxygen reduction reaction (ORR) on various Pt-Bi surfaces using density functional theory calculations. They found that the introduction of Bi changes the determining step of ORR and identified the hydroxy adsorption free energy (GOH*) as a descriptor for ORR activity. The researchers also discovered that the combination of tensile strain introduced by Bi and electron transfer between Pt and Bi affects the d-band position of Pt, leading to the highest ORR activity on PtBi(100), even exceeding that of Pt(111).
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Multidisciplinary Sciences
Bin Shao, Zhi-Qiang Wang, Xue-Qing Gong, Honglai Liu, Feng Qian, P. Hu, Jun Hu
Summary: The integrated CO2 capture and conversion (iCCC) technology is a promising cost-effective approach for Carbon Neutrality. The lack of molecular consensus about the synergistic effect between adsorption and in-situ catalytic reaction hampers its development. In this study, the synergies between CO2 capture and in-situ conversion are illustrated through high-temperature Calcium-looping and dry reforming of methane processes.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhaorui Li, Lu Chen, Zongfang Wu, AiPing Jia, Shucheng Shi, Hui Zhang, Jia Wang, Zhi Liu, Wei-Peng Shao, Fan Yang, Xin-Ping Wu, Xue-Qing Gong, Weixin Huang
Summary: This study investigates the reactivity of OH and hydride species in oxide-catalyzed hydrogenation reactions. Experimental and theoretical results show that surface oxygen vacancies and hydride species on ceria surfaces enhance the semihydrogenation of C2H2 to C2H4, but also lead to decreased selectivity and stability.
Article
Chemistry, Physical
Dongdong Wang, Zhenxuan Yuan, Xilin Wu, Wei Xiong, Jieqiong Ding, Zhenhua Zhang, Weixin Huang
Summary: Developing efficient non-precious-metal catalysts for selective conversion of CO2 into fuels and chemicals is challenging. In this study, a Ni single-atom catalyst confined in N-doped carbon nanotubes is reported as an active, selective, and stable catalyst for the RWGS reaction. The catalyst achieved almost 100% CO selectivity with a STY of 1.88 mol(CO) g(Ni) (-1) h(-1) at 500 degrees C and atmospheric pressure. Strong CO2 adsorption and weak H2 adsorption at the Ni-N-x active site were found to be responsible for the high catalytic activity and CO selectivity.
Article
Chemistry, Physical
Cong Fu, Fei Li, Zongfang Wu, Feng Xiong, Junfa Zhu, Xue-Qing Gong, Weixin Huang
Summary: A trace amount of potassium dopant is found to restructure the surface of anatase TiO2(001) single crystal, changing the termination from molecule termination to oxygen termination. The molecule-terminated surface shows (photo)catalytic activity, while the oxygen-terminated surface is inert.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Wei Xiong, Jieqiong Ding, Dongdong Wang, Weixin Huang
Summary: In this study, the effects of Cu facets on the catalytic performance of ZrO2/Cu inverse catalysts in CO2 hydrogenation to methanol were investigated. The ZrO2-Cu{100} and ZrO2-Cu{110} interfaces exhibited similar apparent activation energies of about 42.6 kJ/mol, while the ZrO2-Cu{111} interface had a higher apparent activation energy of about 64.5 kJ/mol. The bridge formate hydrogenation was identified as the rate-determining elementary surface reaction, with similar activation energies at the ZrO2-Cu{100} (about 36.3 kJ/mol) and ZrO2-Cu{110} (about 40.5 kJ/mol) interfaces and a higher energy at the ZrO2-Cu{111} interface (about 54.5 kJ/mol). Cu facet engineering is suggested as a promising strategy to enhance the catalytic performance of ZrO2/Cu inverse catalysts for CO2 hydrogenation to methanol.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Wei Xiong, Zongfang Wu, Xuanye Chen, Jieqiong Ding, Aiai Ye, Wenhua Zhang, Weixin Huang
Summary: Through experimental and theoretical calculation studies, we find that the Cu{110} facet is the most active facet for ZnO-Cu interfacial catalysis in CO2 hydrogenation to methanol, and the Cu{100} facet is the most active facet for both ZnO-Cu interfacial catalysis and Cu catalysis in the RWGS reaction. Although the ZnO-Cu interface has higher catalytic activity, the RWGS reaction mainly occurs on the bare Cu surface.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Physical
Renjie Zhou, Lipeng Yang, Zhengda Chen, Li Jiang, Tuan Liu, Zhiqiang Wang, Xinyi Huang, Qiuning Lin, Xueqing Gong, Yi Yang, Linyong Zhu
Summary: Photoactivated fluorophores (PAFs) have great potential as imaging tools for subcellular structures and dynamic biological processes. However, the current photoremovable protecting groups (PPGs) used in PAF construction have limitations in terms of excitation wavelength and efficiency. In this study, a new class of coumarin-based PPGs with electron-rich thiophene derived substitutions was developed to address these limitations. The modified PPGs showed redshifted absorption and increased photolysis efficiency, enabling efficient photolysis even under weak blue light. The resulting PAF exhibited fast photoactivation, low background signal, and high signal-to-noise ratio in fluorescence imaging. It is anticipated that these superior photolysis properties make the PPGs a novel platform for constructing photoresponsive systems in various applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yan-Ping Zhang, Zi-Xiang Su, He-He Wei, Zhi-Qiang Wang, Xue-Qing Gong
Summary: Reducing the use of Pt in proton exchange membrane fuel cells is a significant interest for both academia and industry. This study investigated the oxygen reduction reaction (ORR) on various Pt-Bi surfaces using density functional theory calculations. The introduction of Bi altered the determining step of ORR and the hydroxy adsorption free energy (GOH*) was found to be an indicator of ORR activity, with 0.74 eV being the optimal GOH* value. It was also discovered that the strain induced by Bi and electron transfer between Pt and Bi influenced the d-band of Pt, resulting in PtBi(100) having superior ORR activity compared to Pt(111).
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Xiang-Peng Tao, Xue-Qing Gong, Dong Wang
Summary: The study reveals the reaction mechanism of photocatalytic formaldehyde degradation and proposes an optimal degradation mechanism that harnesses the advantages of photogenerated holes and (OH)-O-center dot radicals. Additionally, the research also discovers the correlation between the catalytic and thermocatalytic reaction barriers of C-H bond activation and the polarity of C-H bonds.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
