Biogenic N-P-codoped TiO2: Synthesis, characterization and photocatalytic properties

被引：51

作者：

Han, Ting ^{[1
]}

Fan, Tongxiang ^{[1
]}

Chow, Suk-kwun ^{[1
]}

Zhang, Di ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Composites, Shanghai 200240, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2010年 / 101卷 / 17期

基金：

中国国家自然科学基金;

关键词：

TiO2; Self-doping; Biomass; Biogenic; Photocatalysis; DOPED TITANIUM-DIOXIDE; VISIBLE-LIGHT; DEGRADATION; PHOSPHOR; ANATASE; BIOMASS; POWDERS; FUELS;

D O I：

10.1016/j.biortech.2010.03.107

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Four typical kinds of crop seeds are studied as non-metallic bio-precursors to synthesize biogenic N-P-codoped TiO2 (BNP-TiO2). The as-prepared BNP-TiO2 samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen-adsorption measurement and UV-Vis spectroscopy. The results show that BNP-TiO2 possesses single anatase phase with mesopore structures, and nitrogen and phosphorus contained in original crop seeds are self-doped into the lattice as anions and cations, respectively. Besides, BNP-TiO2 exhibits a strongly enhanced absorption in the UV-Vis light range and red shift of the absorption edge, implicating the highly efficient light-harvesting capacity and sensitization towards visible light. Furthermore, experiments of crystal violet degradation under Xe lamp irradiation indicate superior photocatalytic activity of BNP-TiO2, of which the degradation rate is almost three times that of common TiO2. Circled photocatalytic degradation also shows good photocatalytic stability of BNP-TiO2. This work may pave a new and facile pathway of utilizing discarded biomass to synthesize desirable element-doped metal oxides based on biomass precursors. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：6829 / 6835

页数：7

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