Changchun Institute of Optics,Fine Mechanics and Physics,CAS
An algorithm of fast HEVC PU size decision using information entropy | |
Feng, L.; M. Dai; L. Sun and C. Zhao | |
2016 | |
发表期刊 | Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology
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卷号 | 48期号:9 |
摘要 | We report an efficient visible light-induced reduction of hexavalent chromium Cr(VI) to trivalent Cr(III) by direct illumination of an aqueous solution of potassium dichromate (K2Cr2O7) in the presence of hydrogenated silicon nanowires (H-SiNWs) or silicon nanowires decorated with copper nanoparticles (Cu NPs-SiNWs) as photocatalyst The SiNW arrays investigated in this study were prepared by chemical etching of crystalline silicon in HF/AgNO3 aqueous solution. The Cu NPs were deposited on SiNW arrays via electroless deposition technique. Visible light irradiation of an aqueous solution of K2Cr2O7 (10(-4) M) in presence of H-SiNWs showed that these substrates were not efficient for Cr(VI) reduction. The reduction efficiency achieved was less than 10% after 120 min irradiation at lambda > 420nm. Addition of organic acids such as citric or adipic acid in the solution accelerated Cr(VI) reduction in a concentration-dependent manner. Interestingly, Cu NPs-SiNWs was found to be a very efficient interface for the reduction of Cr(VI) to Cr(III) in absence of organic acids. Almost a full reduction of Cr(VI) was achieved by direct visible light irradiation for 140 min using this photocatalyst. (C) 2015 Elsevier B.V. All rights reserved. |
文章类型 | 期刊 |
收录类别 | EI |
语种 | 中文 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/56912 |
专题 | 中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Feng, L.,M. Dai,L. Sun and C. Zhao. An algorithm of fast HEVC PU size decision using information entropy[J]. Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology,2016,48(9). |
APA | Feng, L.,M. Dai,&L. Sun and C. Zhao.(2016).An algorithm of fast HEVC PU size decision using information entropy.Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology,48(9). |
MLA | Feng, L.,et al."An algorithm of fast HEVC PU size decision using information entropy".Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology 48.9(2016). |
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