Abstract
Here, PbCrO4 nanorods, a commonly used and low-cost yellow pigment, was synthesized via a simple precipitation reaction and can serve as a highly efficient oxygen production and photodegradation photocatalyst. The obtained PbCrO4 nanorods exhibit excellent stability and photocatalytic performance for O2 evolution from water. The production rate is approximately 314.0 μmol h−1 g−1 under visible light, and the quantum efficiency is approximately 2.16% at 420±10 nm and 0.05% at 600±10 nm. In addition, the PbCrO4 shows good degradation performance for methylene blue, methyl blue, methyl orange and phenol under visiblelight irradiation. These results indicate that it is potential to fabricate an effective, robust PbCrO4 photocatalyst by transforming heavy-metal pollutants Pb(II) and Cr(VI) into a highly efficient O2 evolution and photodegradation material. This strategy which uses pollutant to produce clean energy and degrade contaminants is completely green and environmentally benign, and thus could be a promising way for practical environmental applications.
摘要
本文利用简单的沉淀反应将工业废水中含有的剧毒Pb(II)和Cr(VI)离子制备成纳米棒状的黄色颜料PbCrO4. 合成的PbCrO4纳米棒是一种高效的可见光活性产氧和光降解催化剂. 此纳米棒具有优异的光催化稳定性和催化活性, 在可见光下分解水产氧速率高达314.0 μmol h−1 g−1, 在420±10 和600±10 nm处量子效率分别为2.16%和0.05%. 此外, 该催化剂还具有良好的可见光降解亚甲基蓝、 甲基蓝、 甲基橙和苯酚的性能. 以上结果表明, 将剧毒含重金属污染物Pb(II)和Cr(VI)的离子溶液转化为环境友好且高效的可见光光催化剂是可行的. 该策略利用污染物产生清洁能源并降解污染物, 是绿色、 环境友好且非常有前景的废物利用途径.
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Acknowledgements
This work was jointly supported by the National Natural Science Foundation of China (21401190), the Science and Technology Project of Research Foundation of China Postdoctoral Science (2017M612710 and 2016M592519), Shenzhen Peacock Plan (827-000059, 827-000113 and KQTD2016053112042971), the Science and Technology Planning Project of Guangdong Province (2016B050501005), and the Educational Commission of Guangdong Province (2016KCXTD006 and 2016KSTCX126).
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Guo-Qiang Zhang received his bachelor degree majored in material chemistry from Lanzhou University in 2012. Then he completed his PhD degree at the University of Chinese Academy of Sciences under the supervision of Prof. Da-Bing Li. His research interest is the semiconductor photocatalytic water spliting. Now, he continues his research on photocatalysis at SZU-NUS International Collaborative Laboratory as a Post-doctor.
Chen-Liang Su received his BSc degree (2005) and PhD degree (2010) in the Department of Chemistry from Zhejiang University (2010). After that he worked as a research fellow at the Advanced 2D Materials and Graphene Research Centre in the National University of Singapore (2010–2015). He is now a full-professor at the International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology (ICL-2D MOST), Shenzhen University and a Principal Investigator of ICL-2D MOST in materials science. His current interests focus on the chemical design of 2D materials/nano materials for catalysis and energy related applications.
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PbCrO4 yellow-pigment nanorods: A efficient and stable visible-light-active photocatalyst for O2 evolution and photodegradation
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Zhang, GQ., Liu, G., Xu, Y. et al. PbCrO4 yellow-pigment nanorods: An efficient and stable visible-light-active photocatalyst for O2 evolution and photodegradation. Sci. China Mater. 61, 1033–1039 (2018). https://doi.org/10.1007/s40843-017-9229-x
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DOI: https://doi.org/10.1007/s40843-017-9229-x