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使用原始CeO纳米结构对亚甲基蓝进行面依赖光降解。

Facet-Dependent Photodegradation of Methylene Blue Using Pristine CeO Nanostructures.

作者信息

Majumder Deblina, Chakraborty Indranil, Mandal Kalyan, Roy Somenath

机构信息

CSIR-Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700032, West Bengal, India.

S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India.

出版信息

ACS Omega. 2019 Feb 26;4(2):4243-4251. doi: 10.1021/acsomega.8b03298. eCollection 2019 Feb 28.

DOI:10.1021/acsomega.8b03298
PMID:31459631
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6648310/
Abstract

This work comprises the shape- and facet-dependent catalytic efficacies of different morphologies of CeO, namely, hexagonal, rectangular, and square. The formation of different shapes of CeO is controlled using polyvinyl pyrrolidone as a surfactant. The surface reactivity of formation of differently exposed CeO facets is thoroughly investigated using UV-visible, photoluminescence, Raman, and X-ray photoelectron spectroscopies. A correlation between the growth of a surface-reactive facet and the corresponding oxygen vacancies is also established. Considering the tremendous contamination, caused by the textile effluents, the present study articulates the facet-dependent photocatalytic activities of pristine CeO for complete degradation of methylene blue within 175 min. The observed degradation time deploying pristine CeO as a catalyst is the shortest to be reported in the literature to our best knowledge.

摘要

这项工作包括不同形态的CeO（即六边形、矩形和正方形）的形状和晶面依赖性催化效率。使用聚乙烯吡咯烷酮作为表面活性剂来控制不同形状CeO的形成。利用紫外可见光谱、光致发光光谱、拉曼光谱和X射线光电子能谱对不同暴露晶面的CeO形成时的表面反应性进行了深入研究。还建立了表面反应性晶面的生长与相应氧空位之间的相关性。考虑到纺织废水造成的巨大污染，本研究阐明了原始CeO的晶面依赖性光催化活性，可在175分钟内将亚甲基蓝完全降解。据我们所知，以原始CeO作为催化剂观察到的降解时间是文献中报道的最短时间。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/0afeae37b2df/ao-2018-03298e_0004.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/23197ce8f23c/ao-2018-03298e_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/ad70530e0ba7/ao-2018-03298e_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/e188af931564/ao-2018-03298e_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/24f75ff78eff/ao-2018-03298e_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/388ee6549d41/ao-2018-03298e_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/b4f20ac8ce18/ao-2018-03298e_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/d5bf1e94adaa/ao-2018-03298e_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/ccb616598b52/ao-2018-03298e_0011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/f6609773c226/ao-2018-03298e_0012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/29c74c05ae35/ao-2018-03298e_0002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eefc/6648310/0afeae37b2df/ao-2018-03298e_0004.jpg

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