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ACS Applied Materials & Interfaces · 2013 · IF 5.008

C60/Bi2TiO4F2 Heterojunction Photocatalysts with Enhanced Visible-Light Activity for Environmental Remediation

Guisheng Li,Bo Jiang,Xin Li,Zichao Lian,Shuning Xiao,Jian Zhu,Dieqing Zhang,Hexing Li

Fullerene (C60)-enhanced Bi2TiO4F2 hierarchical microspheres were prepared by a facile solvothermal method. Compared to the pure Bi2TiO4F2 photocatalyst, the C60/Bi2TiO4F2 samples exhibit much stronger photocatalytic performance for degrading Rhodamine B (RhB) and Eosin Y (EY) under visible light irradiation. Such greatly enhanced photocatalytic activity may be ascribed to strong combination and heterojunctions between C60 and Bi2TiO4F2, favorable for charge separation and light adsorption. Loading C60 on Bi2TiO4F2 results in a new photocatalytic mechanism (based on photo-generated hvb+ and ·O2- radicals) different from that of pure Bi2TiO4F2.

CAS / MDL: 75-65-0

研究领域: 材料科学 · 环境科学

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JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY · 2016 · IF 1.83

Characterization Of C60/Bi2TiO4F2 as a Potential Visible Spectrum Photocatalyst for The Depolymerization of Lignin

Zhijie Du,Wenzhi Li,Zhiping Xu,Hao Wu,Hasan Jameel,Hou-Min Chang,Long-Long Ma

Effects of a photocatalyst, C60-modified Bi2TiO4F2, on pine kraft lignin under visible light irradiation were investigated, along with those of Bi2TiO4F2 and C60/TiO2 as references. The influences of pH, C60 mass fraction, and the initial lignin concentration on lignin conversion and yields of mono-phenolic products were investigated. Seven products were determined by GC/MS, including phenol, 2-methoxyphenol, 4-ethyl-2-methoxyphenol, 2-methoxy-4-vinylphenol, vanillin, acetovanillone, and homovanillic acid. The yields of products and lignin conversion were higher by C60/Bi2TiO4F2 than Bi2TiO4F2 and C60/TiO2. C60/Bi2TiO4F2 and C60/TiO2 were more stable than Bi2TiO4F2 upon repetitive recycling of catalyst. The effectiveness of C60/Bi2TiO4F2 declines 25%, whereas that of Bi2TiO4F2 declines 56.4% after being recycled five times. FTIR and HRTEM indicated that the deactivation of photocatalysts might be caused by lignin adsorbed on the surface of photocatalysts and the change in the crystal structure.

CAS / MDL: 100-52-7 2785-89-9 121-33-5

研究领域: 化学工程 · 环境科学 · 材料科学

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C60/Bi2TiO4F2 Heterojunction Photocatalysts with Enhanced Visible-Light Activity for Environmental Remediation

Characterization Of C60/Bi2TiO4F2 as a Potential Visible Spectrum Photocatalyst for The Depolymerization of Lignin