1. One-Pot Synthesis of Nano CuO-ZnO Modified Hydrochar Derived from Chitosan and Starch for the H 2 S Conversion.
- Author
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Zang, Lihua, Zhou, Chengxuan, Dong, Liming, Wang, Leilei, Mao, Jiaming, Lu, Xiaomin, Xue, Rong, and Ma, Yunqian
- Subjects
CHITOSAN ,METALLIC oxides ,FUNCTIONAL groups ,AMINO group ,ACTIVATION energy ,POLYACRYLAMIDE ,STARCH - Abstract
A novel kind of hydrochar adsorbent, modified by CuO-ZnO and derived from chitosan or starch, was synthesized for H
2 S adsorption. The prepared adsorbent was characterized by BET, XRD, EDX, SEM, and XPS. The results showed that the modified hydrochar contained many amino groups as functional groups, and the nanometer metal oxide particles had good dispersion on the surface of the hydrochar. The maximum sulfur capacity reached 28.06 mg/g-adsorbent under the optimized conditions. The amine group significantly reduced the activation energy between H2 S and CuO-ZnO conducive to the rapid diffusion of H2 S among the lattices. Simultaneously, cationic polyacrylamide as a steric stabilizer could change the formation process of CuO and ZnO nanoparticles, which made the particle size smaller, enabling them to react with H2 S sufficiently easily. This modified hydrochar derived from both chitosan and starch could be a promising adsorbent for H2 S removal. [ABSTRACT FROM AUTHOR]- Published
- 2021
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