期刊
JOURNAL OF CLEANER PRODUCTION
卷 230, 期 -, 页码 966-973出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2019.05.141
关键词
Tendril-inspired structure; Tellurium; Membrane; Adsorption; Photovoltaic waste
资金
- National Natural Science Foundation of China of China [21706100, U1507115]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRF18003]
- Natural Science Foundation of Jiangsu Province [BK20160500, BK20161362, BK20160491]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [SJKY19_2577, SJKY19_2525, SJCX19_1158]
- Xingtai Polytechnic College Application Innovation Project [20190106]
Fabrication of membrane-based adsorbent with outstanding functions for efficient recovering tellurium from photovoltaic waste has been intriguing but is still challenging. Inspired by the winding of tendrils, herein, a membrane-based adsorbent for tellurium separation has been fabricated via winding calcined micron-sized Mg-Al layer double hydroxides (LDHs) fibers with the acid of ultralong MnO2 nanowires (UL-MnO2-NWs). To obtain the calcined LDHs fibers, Al2O2 fibers was fabricated by template-directed synthesis employing cotton fibers as templates, and then the calcined LDHs fibers were prepared via crystal growth on Al2O3 fibers surface and subsequent calcination treatment. UL-MnO2-NWs were obtained by a hydrophobic route. The immobilized LDHs in the tendril-inspired membrane allow the tellurium to be adsorbed in matrix from the simulate leaching solution of CdTe photovoltaic waste with permeate flux of 34 m(3)/m(2)h. It is worth mentioning that the tendril-inspired membrane achieves ultrahigh removal efficiency up to 98.73%. The static soaking tests proved the excellent mechanical stability of the tendril-inspired membrane. More importantly, the tendril-inspired membrane can be regenerated via elution and calcination processes, which match well with the requirements for practical separation applications. Under the cyclic tests, the tendril-inspired membrane still maintains a high level of separation after 5 cycles. As a high-efficient, mechanically stable, and regenerated membrane-based adsorbent, tendrils-inspired membrane has tremendous potential to handle and recycle toxic tellurium containing compounds. (C) 2019 Elsevier Ltd. All rights reserved.
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