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Facile Preparation of Water-processable Biochar Based on Pitch Pine and Its Electrochemical Application for Cadmium Ion Sensing

文献类型： 外文期刊

作者： Liu, Guangbin 1 ; Li, Linjian 1 ; Zhang, Kun 2 ; Wang, Xiaoqiang 1 ; Chang, Juan 1 ; Sheng, Yingying 1 ; Bai, Lin 1 ; Wen 1 ;

作者机构： 1.Jiangxi Agr Univ, Key Lab Appl Chem, Nanchang 330045, Peoples R China

2.Jiangxi Inst Red Soil, Nanchang 330046, Peoples R China

关键词： Biochars;Sensors;Water-dispersiblity;Electrochemistry;Cadmium ion

期刊名称：INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE （ 影响因子：1.765； 五年影响因子：1.685 ）

ISSN： 1452-3981

年卷期： 2016 年 11 卷 2 期

页码：

收录情况： SCI

摘要： The water-processable biochar (BC) based on pitch pine was prepared by dispersing these grinded micropowders into carboxymethyl cellulose (CMC) mixed aqueous dispersion for electrochemical sensing of cadmium ion (Cd2+) in real samples. Biochars was obtained by pyrolyzing the pitch pine under oxygen-limited conditions at 600 degrees C. Montmorillonite (MMT) was employed for enhancing surface area, adsorption capacity, ion-exchange ability and dispersive stability. Carboxymethyl cellulose was selected for enhancing water-dispersive ability, film-forming ability, adhesive ability. BC-CMC-MMT composites displayed synergistically enhanced ability like surface area, adsorption capacity and stripping response towards Cd2+, which was employed as cost-effective electrode modified material for voltammetric determination of Cd2+ in linear range of 2.0 x 10(-8) - 8 x 10(-5) M with limit of detection of 6.7 nM, remarkable selectivity, and good practicability. Satisfactory sensing performance indicated that low-cost water-processable BC has practical values and serves as sensing material for electrochemically determining heavy metal ions in real samples.

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