Citation: Peng XU, Wei DAI, Sha-Sha WANG, Zhen-Guo WU, Nan-Nan CHEN, Yang WANG, Jian LIU. Ag Nanoparticle-Doped Activated Microporous Carbon Spheres: An Efficient Adsorption/Catalysis Bifunctional Material for the Removal of Congo Red[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(4): 752-764. doi: 10.11862/CJIC.2022.064 shu

Ag Nanoparticle-Doped Activated Microporous Carbon Spheres: An Efficient Adsorption/Catalysis Bifunctional Material for the Removal of Congo Red

Co-innovation Center for Efficient Processing and Utilization of Forest Products, Nanjing Forestry University, Nanjing 210037, China

Corresponding author: Peng XU, xupeng@njfu.edu.cn Jian LIU, liu.jian@nju.edu.cn
Received Date: 1 November 2021
Revised Date: 13 January 2022

Figures(10)

Herein, we fabricated silver nanoparticle - doped activated microporous carbon spheres (Ag/AMCSs) through a combining method of spray drying, carbonization, and KOH activation by using chitosan as a precursor. Based on a series of characterization and performance studies, Ag/AMCSs are confirmed to be able to function as both an adsorbent and a catalyst for the reduction of Congo red (CR) in the presence of NaBH₄ due to the high porosity and high dispersion of silver nanoparticles. Adsorption studies were performed by varying pH, contact time, and initial concentration, and it was found that the adsorption process could be well estimated by the pseudo-second-order kinetic plot and Langmuir models, and the maximum adsorption capacity of Ag/AMCSs was estimated as 445 mg·g^-1. For the reduction of CR, the rate constant k was calculated up to 0.311 min^-1, and the conversion efficiency of CR remained at 95% after 5 successive cycles.
- carbon,
- silver,
- activation,
- catalyst,
- adsorbent
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