期刊
CHEMOSPHERE
卷 250, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.126291
关键词
Wood flour; Biochar; Visible-light photocatalyst; BiOBr; Organic pollutant degradation; Cr(VI) reduction
资金
- Natural Science Foundation of China [51708297]
- China Postdoctoral Science Foundation [2019M661856]
- Qing Lan Project of Jiangsu Province (2020)
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX18_0994]
- Project of National First-class Disciplines (PNFD)
In the present study, industrial wood flour waste was selected for the first time as the precursor to produce biochar (WFB). The WFB was then used to prepare WFB/BiOBr visible-light photocatalysts, in which WFB acted as the carbon support to enhance the photocatalytic performance of BiOBr. Specifically, the impact of WFB pyrolysis temperature on the visible-light photo-removal performance of WFB/BiOBr was studied through degrading rhodamine B and reducing Cr(VI). The results indicated that when the pyrolysis temperature was 600 degrees C, the prepared WFB (600-WFB) had the highest graphitization degree, which afterwards significantly enhanced the visible-light photocatalysis performance of the BiOBr. Having higher graphitization degree, 600-WFB/BiOBr exhibited the highest photocatalytic capability. With a dosage of 0.5 g/L, the 600-WFB/BiOBr could completely remove to 20 mg/L of RhB and 5 mg/L of Cr(VI) within 90 min. Since wood flour is an abundantly existed industrial bioresource waste and easily pyrolyzed to prepare biochar, WFB is a promising alternative to replace traditional carbonaceous materials for the design of green and high-efficient visible-light photocatalysts for environmental remediation. (C) 2020 Elsevier Ltd. All rights reserved.
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