期刊
JOURNAL OF CLEANER PRODUCTION
卷 318, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2021.128583
关键词
Rice straw; Mesoporous carbon; Zinc oxide; Photocatalysis; Nanocomposite; Adsorption
资金
- Thailand Research Fund, Office of the Higher Education Commission
- Khon Kaen University [MRG6280199]
- Center of Excellence for Innovation in Chemistry (PERCH-CIC), Ministry of Higher Education, Science, Research and Innovation
- National Higher Education Science Research and Innovation Policy Council
- Program Management Unit on Area Based Development [A13F630049-PMU]
- Thailand Research Fund [RSA6280031]
- Newton Mobility Grant (Royal Society) [NMG\R1\191147]
- Newton Mobility Grant (OHEC, Ministry of Higher Education, Science, Research and Innovation, Thailand) [NMG\R1\191147]
- Institute for the Promotion of Teaching Science and Technology
- Khon Kaen University
Highly mesoporous carbon-zinc oxide nanocomposites were synthesized from rice straw, showing excellent adsorption and degradation properties for toxic dyes. Utilizing a 1-step zinc chloride activation process, the material achieved high specific surface area and mesoporosity, with graphene-like sheets observed within the structure.
Highly mesoporous carbon-zinc oxide nanocomposites were synthesized from rice straw through a simple pyrolysis method. These carbon-zinc oxide nanocomposites were ideal for adsorption and degradation of toxic dyes from wastewater. Synthetic methodology utilized a 1-step zinc chloride activation process that eliminated the need for acid washing, yielding a graphitic material with specific surface area of 942.7 m2 g-1 and 99% mesoporosity. X-ray diffraction and X-ray photoelectron spectroscopy patterns indicated the existence of zinc oxide and turbostratic graphite. Transmission electron microscopy images revealed zinc oxide particles sizes ranging between 20 and 100 nm. Surprisingly, graphene-like-sheets were also observed within the nanocomposite structure. Adsorption capacities for methylene blue and congo red were 399 mg g-1 and 410 mg g-1 respectively. By retaining zinc oxide in the carbon structure, catalytic degradation of dyes was possible in the presence of ultraviolet radiation. The synergistic effect of adsorption and photocatalytic degradation increased the maximum dye removal of methylene blue to 614 mg g-1, while congo red removal was exceptionally high at 2628 mg g-1.
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