期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 7, 期 21, 页码 18067-18075出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b05081
关键词
cellulose nanocrystal; Fe2+/H2O2 oxidation; dye adsorption; copper ion adsorption
资金
- Key Program for International S & T Innovation Cooperation Projects of China [2016YFE 0131400]
- Candidates of Young and Middle -Aged Academic Leader of Zhejiang Province, Zhejiang Provincial Natural Science key Foundation of China [LZ20E030011]
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
A simple and eco-friendly Fe2+/H2O2 oxidation of microcrystalline celluloses (MCCs) to prepare cellulose nanocrystals (CNCs) with high carboxylation content is proposed. The effects of reaction times on the morphology, microstructure, and chemical and thermal properties of isolated carboxylated CNCs were investigated. The oxidative decomposition of Fe2+/H2O2 solution of MCC yielded CNCs with a size of 92-140 nm in length and 19-23 nm in width. The CNCs extracted at 6 h possessed the highest carboxyl content (2.2 mmol/g) with a zeta potential of -41 mV and a thermal decomposition temperature of greater than 325 degrees C. These CNCs are efficient adsorbents for dyes (methylene blue) and metal ions (copper ion) found in wastewater, with removal rates of up to 95.6 and 82.3%, respectively.
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