Article
Environmental Sciences
Xiao Qu, Jianbin Lin, Wei Qiang, Chuntao Chen, Dongping Sun
Summary: Photocatalytic activity of Titanium dioxide (TiO2) can be enhanced through structural regulation by chemical reduction method. The modified TiO2 samples show strong light absorption ability and exhibit excellent degradation performance for various organic pollutants.
Article
Energy & Fuels
Cafer Saka
Summary: In this study, g-C3N4 was applied to H-2 production for the first time in the field of NaBH4 methanolysis, with O doped g-C3N4 showing a significant increase in H-2 production with an HGR value of 10800 ml min g(-1). The activation energy for O doped g-C3N4 was approximately 36.13 kJ mol(-1).
Article
Chemistry, Physical
Cafer Saka
Summary: The surface properties of graphitic carbon nitride (GCN) were enhanced by doping with sulphur (S), boron (B), and oxygen (O). Metal-free GCN catalysts with heteroatom dopants showed improved surface functional groups and a carbon defect structure. These catalysts were used for hydrogen production from sodium borohydride (SB) methanolysis, resulting in a 2.2-fold increase in H2 production compared to GCN. The HGR value obtained with B, O, and S doped GCN was 9166 ml min-1g-1. XPS, SEM-EDX, TEM, FTIR, and XRD analyses were performed to investigate the structural properties of the catalysts, and the activation energy (Ea) for B, O, and S doped GCN was determined to be 28.89 kJ mol-1.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Xiaonan Yang, Liteng Ren, Daochuan Jiang, Lisha Yin, Zhongjun Li, Yupeng Yuan
Summary: This study presents a trifunctional Schottky junction at metal-photocatalyst heterointerfaces, which effectively enhances the performance of photocatalysts for hydrogen production under visible light. The Schottky junction, involving chemically stabilized ultrafine platinum nanoparticles on graphitic carbon nitride nanosheets, promotes efficient interfacial charge transfer and prevents aggregation of the nanoparticles during photocatalytic reactions. The results demonstrate an over 11-fold enhancement in visible light H2 production compared to the control sample. These findings highlight the potential for developing high-efficiency photocatalysts through strong metal-semiconductor electronic interactions.
Article
Chemistry, Physical
Muhammad A. Abbas, Geun Jun Lee, Jin Ho Bang
Summary: Nickel-cadmium and nickel-metal hydride batteries, as well as lithium-ion intercalation materials, exhibit voltage deviations known as the memory effect. The extent of the memory effect in TiO2 is influenced by particle size, Li-ion mobility, and the type of vacancies.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Environmental
Fanglei Yao, Liming Dai, Jiabao Bi, Jingyao Deng, Litong Zhang, Hongan Zhao, Wenyao Zhang, Pan Xiong, Yongsheng Fu, Jingwen Sun, Junwu Zhu
Summary: The rapid development of photocatalytic water splitting technology has provided a foundation for the photo catalytic transfer hydrogenation to produce high value-added chemicals using water as hydrogen source. This study synthesized a 3D hierarchical porous carbon nitride sponge, which exhibited excellent catalytic activity and provided a green and sustainable method for converting solar energy to valuable fine chemicals.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xiaoyi Zhan, Zheng Peng, Hao Huang, Hui Zhang, Zhao Liu, Xin Ou, Fan Yang, Zhi Liu
Summary: By employing low-energy Ar+ irradiation to modify the surface oxygen vacancy density of TiO2 and investigating its interaction with water using APXPS, key factors in tuning the photoelectrochemical performance of TiO2 have been revealed.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yinjun Lin, Yuanyuan Yang, Wenting Guo, Lifen Wang, Ruiqin Zhang, Yonggang Liu, Yunpu Zhai
Summary: Introducing nitrogen-oxygen double vacancies to modify carbon nitride significantly improves its photocatalytic performance, with factors such as increased specific surface area and elevated conduction band position contributing to enhanced hydrogen evolution. This research provides a new concept for the design of defective carbon nitride and lays the foundation for the development of more effective photocatalysts in the future.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Jiale Liu, Sheng Li, Zexiong Qiu, Yang Liu, Cheng Qiu, Wenhao Zhang, Jianhang Qi, Kai Chen, Wei Wang, Chaoyang Wang, Zhaozhen Cui, Yaqiong Su, Yue Hu, Anyi Mei, Hongwei Han
Summary: The electrical conductivity and defect density of the TiO2 ETL in PSCs are improved by modulating the mesoporous TiO2 layer using reduction and oxidation treatments to manage oxygen vacancies. This results in enhanced energy level alignment, reduced interface recombination, and improved carrier extraction and transport.
Article
Engineering, Chemical
Zhenpeng Cui, Min Zhao, Shuyang Li, Jingjing Wang, Yang Xu, Mohamed Nawfal Ghazzal, Christophe Colbeau-Justin, Duoqiang Pan, Wangsuo Wu
Summary: Vacuum annealing of titanium dioxide with ethanol enhances its photocatalytic performance under visible light by inducing visible light absorption, creating oxygen vacancy, and forming heterojunction structures.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Qing-Yu Liu, Hao-Dong Wang, Rui Tang, Quan Cheng, Yong-Jun Yuan
Summary: In this study, rutile titanium dioxide (TiO2) nanoparticles with large specific surface area and abundant oxygen vacancy were designed for photocatalytic nitrogen fixation, showing high photocatalytic performance with the highest ammonia generation rate exceeding 6.5 times that of P25. This research provides a simple and facile method to prepare highly reactive TiO2 photocatalysts for enhanced photocatalytic nitrogen fixation performance.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Wenlong Tan, Xu Li, Pei Zhang, Xuyan Yao, Jinzhao Li, Peng Jin, Kun Li
Summary: This study emphasizes the importance of understanding and explaining the function of fatty acid photodecarboxylase (FAP), and proposes defective semiconductor nanomaterials as potential alternatives to FAP. The synthesis of ferrum-doped titanium dioxide (FeTiO2) introduces surface defects that act as enzyme-like binding sites, enhancing the catalytic activity for photocatalytic decarboxylation reactions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Xinglan Deng, Kangyu Zou, Roya Momen, Peng Cai, Jun Chen, Hongshuai Hou, Guoqiang Zou, Xiaobo Ji
Summary: This study proposes a strategy of oxygen vacancy (OV) engineering assisted high-content anion doping to enhance charge transfer kinetics for ultrafast sodium-storage performance in TiO2. The approach successfully increases the rate capability and energy density of the TiO2 electrode materials.
Article
Chemistry, Physical
Yuan Tian, Xiao Zhang, Yongguang Zhang, Jingde Li, Aizhong Jia, Guihua Liu, Zhumabay Bakenov
Summary: A composite material consisting of Co/TiO2-x@carbon was proposed as a sulfur host to address the shuttle effect and conversion kinetics issues in lithium/sulfur batteries. With oxygen defects, carbon coating, and Co nanoparticles, the electrode exhibited outstanding cycling stability and superior rate performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Wentao Zhang, Kunrui Wei, Wenguang Huang, Jianghua Yang, Yonghai Gan, Shujuan Zhang
Summary: Post-synthetic modification with beta-diketone has been shown to enhance the visible light response activities of metal-organic frameworks (MOFs). Through a joint mechanism of exciton-mediated energy transfer and photosensitization, diketone anchoring can improve the photocatalytic generation of singlet oxygen (O-1(2)) by MOFs.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Materials Science, Multidisciplinary
Xueru Chen, Yin Zhang, Dashui Yuan, Wu Huang, Jing Ding, Hui Wan, Wei-Lin Dai, Guofeng Guan
Summary: Porous g-C3N4 nanosheets (PCN) prepared by nickel-assisted thermal polymerization method exhibit superior Cr(VI) photocatalytic reduction efficiency compared to pure g-C3N4, attributed to increased layer spacing, enhanced specific surface area, and promoted effective photon absorption. Additionally, PCN formation of pores benefits Cr(VI) removal efficiency.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yuting He, Xue Li, Wenyi Cai, Huimin Lu, Jing Ding, Hongping Li, Hui Wan, Guofeng Guan
Summary: Through the synthesis of a series of basic porous ionic polymers and the coupling of different reactions to synthesize chain carbonates, high catalytic activity, stable recyclability, and compatibility were achieved. The research provides a new approach for the efficient insertion of CO2 into chain carbonates.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Hui Ding, Yuting He, Jing Ding, Hui Wan, Guofeng Guan
Summary: The study demonstrated the efficient and reusable catalyst of hydroxyl ionic liquids modified melem oligomers for promoting the reaction of CO2 with epoxides to form cyclic carbonates under solvent-free and co-catalyst-free conditions. The research provided an original idea for designing high-efficiency catalysts and proposed the multi-synergistic effects of catalysts on CO2 conversion process.
Article
Chemistry, Physical
Dashui Yuan, Xueru Chen, Zongyuan Li, Cheng Fang, Jing Ding, Hui Wan, Guofeng Guan
Summary: Introducing benzene ring embedding structure into carbon nitride has a positive impact on its structure and photocatalytic performance. The prepared H3BTC/CN composite can effectively capture photo-generated electrons and promote the separation of photo-generated charge carriers, significantly increasing the hydrogen evolution rate.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yuting He, Xue Li, Hongping Li, Jing Ding, Hui Wan, Guofeng Guan
Summary: A novel mode of CO2 utilization was explored in this study, where CO2 played a dual role in the one-pot pressure-swing synthesis of dimethyl carbonate. As a raw material, CO2 participated in the coupling reaction, while also acting as an acidic inhibitor to suppress side-reactions.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Xueru Chen, Xue Li, Liang Song, Ruijie Chen, Hongping Li, Jing Ding, Hui Wan, Guofeng Guan
Summary: By synthesizing cyano-containing carbon nitride with coral-like morphology, the separation rate of photo-generated electron-hole pairs was improved, leading to superior performance in photocatalysis and heavy metal reduction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Xue Li, Jun Wu, Tianjiao Hou, Hongping Li, Lei Wang, Jing Ding, Hui Wan, Guofeng Guan
Summary: A series of hypergolic ionic liquids, namely bis(1H-1,2,3-triazole-1-yl) dihydroborate (BTDB) hypergolic ionic liquids, with low melting points, high density, and superior density-specific impulse, were successfully synthesized. Among them, 1,3-diallyl-1H-imidazol-3-ium bis(1H-1,2,3-triazole-1-yl) dihydroborate exhibited promising potential as a rocket fuel.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Engineering, Chemical
Xueru Chen, Xue Li, Jun Wu, Cheng Fang, Jing Ding, Hui Wan, Guofeng Guan
Summary: The study prepared a high surface area isotype heptazine/triazine based carbon nitride heterojunction (HTCN-1M) using a molten salt method, which utilized H2SO4-treated melamine as precursor. The synergistic effect of the structure's built-in electric field and the abundant specific surface area led to excellent photocatalytic performance with H(2) evolution up to 5764 mu mol h(-1) g(-1), significantly higher than pure g-C3N4.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Dashui Yuan, Zongyuan Li, Xueru Chen, Jing Ding, Hui Wan, Guofeng Guan
Summary: In this study, a homodispersed S-scheme carbon nitride homojunction was successfully prepared by pre-doping and recalcination method. The rich interface and S-scheme homojunction structure led to improved photogenerated electron transfer efficiency and enhanced photocatalytic performance.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Engineering, Environmental
Kai Ge, Yuting He, Wenyi Cai, Linyan Cheng, Cheng Fang, Jing Ding, Hui Wan, Guofeng Guan
Summary: Nitrogen-doped microporous carbon materials were synthesized from carbonization of 1,8-diazabicyclo[5.4.0] undec-7-ene modified carboxylic acid polymers. The introduction of DBU increased the surface nitrogen content, specific surface area, and pore volume of the resulting carbon material. The nonactivated porous carbon exhibited high CO2 capture capacity and selectivity, and showed great stability and reusability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Xue Li, Yin Zhang, Hongping Li, Jing Ding, Hui Wan, Guofeng Guan
Summary: A series of hypergolic ionic liquids based on asymmetric cations were synthesized and their asymmetric structure was confirmed by various instruments. These high-density hypergolic ionic liquids have a wide range of liquid temperatures and show potential as rocket propellants.
Article
Chemistry, Multidisciplinary
Yuting He, Huimin Lu, Xue Li, Jun Wu, Tiancheng Pu, Wei Du, Hongping Li, Jing Ding, Hui Wan, Guofeng Guan
Summary: By incorporating Lewis basic tertiary N for CO2 activation and utilizing temperature control for thermal recovery of nucleophilic HCO3- to stronger Bronsted basic OH- during CH3OH transesterification, LB-PILs exhibit high activity, stable repeatability, and linear carbonate universality.
Article
Chemistry, Physical
Xueru Chen, Xin Li, Xue Li, Huimin Lu, Lei Wang, Qianqian Liu, Hongping Li, Jing Ding, Hui Wan, Guofeng Guan
Summary: The vacancy engineering and morphology construction of hexagonal hollow carbon nitride (HHCN) were achieved simultaneously through self-assembly using melamine (MA) and cyanuric acid (CA) in the presence of P123 and H2SO4. This synergistic effect of P123 as a structure directing agent and H2SO4 as a hole-maker and stability-maintainer led to the formation of HHCN with carbon vacancies. The introduction of carbon vacancies improved the photocatalytic hydrogen evolution rate of HHCN significantly, demonstrating its superior performance compared to g-C3N4.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Engineering, Environmental
Jie Zhou, Wenyi Cai, Jing Ding, Hui Wan, Guofeng Guan
Summary: The study successfully constructed a CNQDs/WO3 Z-scheme heterostructure composite with excellent photocatalytic activity, especially prominent photoreduction performance under visible light irradiation for efficient degradation of Cr(VI). Additionally, the composite also exhibited good stability and recyclability, making it a promising candidate for environmental protection applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
