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low temperature preparation of flower-like BiOCl film and its photocatalytic activity

Science China Chemistry 2012年第8期55卷 2438-2444页

作者： LIU XiaoXia FAN CaiMei WANG YunFang WANG YaWen ZHANG XiaoChao LIANG ZhenHai College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China

The BiOCI thin film with flower-like sphere structure was prepared at a low temperature by the alcoholysis-coating method using BiC13 as precursor. The obtained thin film was characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, electronic energy spectrum （EDS） and ultraviolet-visible diffuse reflectance spectroscopy （UV-vis DRS）. And the re- suits showed that the obtained BiOC1 film without calcination was composed of flower-like sphere structure with tetragonal phase and had a good absorption for ultraviolet. The photocatalytic activity of BiOC1 thin film was also evaluated by the deg- radation of methyl orange in water under UV light irradiation. The degradation experimental results confirmed that the film prepared at low temperature possessed a high photocatalytic activity and could achieve 97% degradation to 10 mg/L methyl orange solution after 150 min UV light irradiation. The stability of the obtained BLOC1 thin film was also good and its photo- catalytic activity still remained an above 94% removal of methyl orange after being used four times. In addition, a possible formation mechanism of BiOCI thin film was also inferred and the results suggested that the ethylene glycol solvent may con- tribute to the forming flower-like sphere structure.

关键词： flower-like BiOCl film low-temperature preparation photocatalytic activity

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Synthesis methods and powder quality of titanium monocarbide

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CHINESE JOURNAL OF CHEMICAL ENGINEERING 2024年第8期72卷 10-18页

作者： Xiang, Maoqiao Ding, Wenjun Dong, Qinghua Zhu, Qingshan Chinese Acad Sci Inst Proc Engn State Key Lab Mesosci & Engn Beijing 100190 Peoples R China Univ Chinese Acad Sci Sch Chem Engn Beijing 100049 Peoples R China Chinese Acad Sci Innovat Acad Green Manufacture Beijing 100190 Peoples R China

Titanium monocarbide (TiC), which is the most stable titanium-based carbide, has attracted considerable interest in the fields of energy, catalysis, and structural materials due to its excellent properties. Synthesis of high-quality TiC powders with low cost and high efficiency is crucial for industrial applications; however major challenges face its realization. Herein, the methods for synthesizing TiC powders based on a reaction system are reviewed. This analysis is focused on the underlying mechanisms by which synthesis methods affect the quality of powders. Notably, strategies for improving the synthesis of highquality powders are analyzed from the perspective of enhancing heat and mass transfer processes. Furthermore, the critical issues, challenges, and development trends of the synthesis technology and application of high-quality TiC powder are discussed. (c) 2024 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Titanium carbide Synthesis methods Reaction engineering Reaction kinetics Powder technology low-temperature preparation SINGLE-CRYSTAL GROWTH MOLTEN-SALT CARBOTHERMAL SYNTHESIS THERMAL-CONDUCTIVITY ELECTRONIC-STRUCTURE EVOLUTION REACTION TIC POWDERS low-COST CARBIDE

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Nanocrystalline TiO2 thin film electrodes prepared by common pressure hydrothermal method at low temperature

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Science Bulletin 2005年第14期 43-46页

作者： LI Chengyu1,2, LIN Yuan1, LI Xueping1, WANG Zhengping2, MA Yutao1, ZHOU Xiaowen1, FENG Shujing1 & XIAO Xurui1 1. Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China 2. Chemical College of Harbin Engineering University, Harbin 150001, China

Nanocrystalline TiO2 thin film electrodes have been prepared from mixed pastes of tetrabutyl titanate and nanocrystalline TiO2 particles by common pressure hydro- thermal method at low temperature. The tetrabutyl titanate was hydrolyzed and crystallized into anatase TiO2 to inter- connect nanocrystalline TiO2 particles and adhere them to conductive substrates, obtaining highly porous and me- chanically stable TiO2 nanocrystalline film. The conversion efficiencies of the dye-sensitized solar cells based on prepared electrodes on conductive glass substrates and flexible sub- strates were 4.8% and 1.9% under illumination of 100 mW/cm2, respectively.

关键词： nanocrystalline TiO2 thin film electrode tetrabutyl titan- ate common pressure hydrothermal method low-temperature preparation dye-sensitized solar cell.

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