Biogenic hierarchical TiO₂/SiO₂ derived from rice husk and enhanced photocatalytic properties for dye degradation.
Biogenic hierarchical TiO₂/SiO₂ derived from rice husk and enhanced photocatalytic properties for dye degradation.
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稻壳衍生的生物多级 TiO2/SiO2 及其增强的染料降解光催化性能
DOI：
10.1371/journal.pone.0024788
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发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Zhang D
中科院分区：
文献类型：
--
作者：
Yang D;Fan T;Zhou H;Ding J;Zhang D
稻壳作为一种农业生物资源，被用作非金属生物前驱体来合成生物源分级TiO₂/SiO₂（BH - TiO₂/SiO₂），并且该产物被应用于染料降解。
所制备的BH - TiO₂/SiO₂样品通过X射线衍射（XRD）、X射线光电子能谱（XPS）、氮吸附测量、紫外 - 可见光谱和电子顺磁共振（EPR）进行表征。结果表明，BH - TiO₂/SiO₂具有锐钛矿相和金红石相，以无定形SiO₂为背景，其包含介孔结构，并且源自原始稻壳的氮自掺杂到晶格中。此外，BH - TiO₂/SiO₂在可见光范围内的光捕获能力得到增强。而且，EPR证明了BH - TiO₂/SiO₂的催化活性，并且其光催化活性和稳定性也都得到提高，这通过在光照下亚甲基蓝染料的循环降解得以说明。
这项工作为基于广阔自然环境中可用的生物质将天然分级多孔结构与合成材料化学相结合以促进人类社会的可持续发展提供了一种良好的方法，并拓展了生物质在光催化剂、太阳光分解水等应用中的潜力。
Background Rice husk, an agricultural bioresource, is utilized as a non-metallic bio-precursor to synthesize biogenic hierarchical TiO2/SiO2 (BH-TiO2/SiO2) and the products are applied to dye degradation. Methodology/Principal Findings The as-prepared BH-TiO2/SiO2 samples are characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), nitrogen-adsorption measurement, UV-vis spectroscopy and electronic paramagnetic resonance (EPR). The results show that BH-TiO2/SiO2 possesses both anatase and rutile phases with amorphous SiO2 as background, which contains mesopore structure, and nitrogen derived from original rice husk is self-doped into the lattice. Besides, the light-harvesting within the visible-light range of BH-TiO2/SiO2 has been enhanced. Moreover, the catalytic activity of BH-TiO2/SiO2 has been proven by EPR, and both the photocatalytic activity and stability of BH-TiO2/SiO2 are improved as well, which has been illustrated by cycled degradation of methylene blue dye under irradiation. Conclusions/Significance This work provides a good way to combine natural hierarchical porous structure with synthetic material chemistry based on available biomass in the vast natural environment for the sustainable development of human society, and extends potentials of biomass in applications such as photocatalysts, sunlight splitting water and so forth.
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影响因子：
3.5
作者：
Jayakumar, OD;Salunke, HG;Kulshreshtha, SK
通讯作者：
Kulshreshtha, SK
影响因子：
15.1
作者：
Behnajady, M. A.;Modirshahla, N.;Rabbani, M.
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影响因子：
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作者：
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DOI：
10.1111/j.1151-2916.1987.tb04845.x
发表时间：
1987-01-01
影响因子：
3.9
作者：
BROW, RK;PANTANO, CG
通讯作者：
PANTANO, CG
影响因子：
15
作者：
Fritz, SE;Martin, SM;Toney, MF
通讯作者：
Toney, MF