负载壳聚糖/β-环糊精的 ZnO 对可见光下 Cr(VI)解毒的光催化性能增强。
Enhanced photocatalytic response of ZnO embedded chitosan/β-cyclodextrin towards the detoxification of Cr(VI) under visible light.
机构信息
Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram 624 302, Dindigul, Tamil Nadu, India.
Department of Chemistry, The Madura College, Madurai 625 011, Tamil Nadu, India.
出版信息
Int J Biol Macromol. 2020 Mar 15;147:867-876. doi: 10.1016/j.ijbiomac.2019.09.246. Epub 2019 Oct 23.
The present work focused on the assessment of heterogenous photocatalytic efficacy of ZnO@CS-β-CD towards the degradation of hexavalent chromium under visible light illumination. The prepared ZnO@CS-β-CD was extensively characterized using XRD, FTIR, SEM, EDX with mapping, TGA, DSC and UV/vis DRS techniques and the photoreduction of Cr(VI) to Cr(III) was confirmed by X-ray photoelectron spectroscopy. The DRS results revealed that the band gap of ZnO@CS-β-CD was narrowed than ZnO from 3.23 to 2.01 eV. The photocatalyst hold excellent reusability up to seven cycles and the field trail results demonstrated for the practical application for the treatment of wastewater.
本工作主要研究了 ZnO@CS-β-CD 在可见光照射下对六价铬的异相光催化降解性能。采用 XRD、FTIR、SEM、EDX 图谱、TGA、DSC 和 UV/vis DRS 技术对制备的 ZnO@CS-β-CD 进行了广泛的表征，并通过 X 射线光电子能谱证实了 Cr(VI)到 Cr(III)的光还原。DRS 结果表明，与 ZnO 相比，ZnO@CS-β-CD 的带隙从 3.23 降至 2.01 eV。该光催化剂具有优异的可重复使用性，可重复使用多达 7 次，田间试验结果表明其可用于实际废水处理。
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