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| Preparation of ZIF-8/ Corncob Adsorbent and Its Dye Adsorption Performance |
| Received:April 22, 2020 |
| DOI：10.11980/j.issn.0254-508X.2020.08.009 |
| Key Words:corncob metal-organic frameworks dye adsorption composite |
| Fund Project:国家自然科学基金青年基金（31700510）；陕西省自然科学基金（2018JQ3013）；陕西科技大学轻工科学与工程“生物质化学与材料”院士工作室项目（134090002）。 |
| Author Name | Affiliation | Postcode | | MENG Xin | College of Bioresources Chemical and Materials Engineering, Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | DUAN Chao | College of Bioresources Chemical and Materials Engineering, Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | ZHANG Yanling | College of Bioresources Chemical and Materials Engineering, Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | LU Wanli | College of Bioresources Chemical and Materials Engineering, Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | DONG Fengxia | China Pulp and Paper Research Institute Co., Ltd., Beijing, 100102 | 100102 | | WANG Wenliang | College of Bioresources Chemical and Materials Engineering, Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | DAI Lei | College of Bioresources Chemical and Materials Engineering, Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 |
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| Abstract:The ZIF-8/ corncobs adsorbing composite was prepared by treating raw corncob material with sodium chlorite for delignification and TEMPO for oxidation, and followed by in-situ loading zinc metal-organic framework (ZIF-8) on the surface of the modified corncobs. The effects of modification on the structure and properties of corncobs with different particle sizes were discussed. Besides, the effects of block corncobs (B-CBs) and particle corncobs (P-CBs) on the ZIF-8 loading and the adsorption properties of composite materials were also compared. The results showed that delignification and oxidation treatment could increase the content of cellulose and carboxyl groups in the corncob, and promote the coordinated binding and in-situ anchoring of nano-ZIF-8 crystals on the corncob. Compared with the B-CBs, the modified P-CBs had a higher specific surface area, Zeta potential and carboxyl content, which was more conducive to the loading and distribution of ZIF-8, thus leading to a better dye adsorption capacity of methyl orange 3.5 mg/g vs. 1.0 mg/g. Both composite materials above mentioned have good reusability (more than 90% of dye removal efficiency after 6 cycles). |
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