光催化
材料科学
纳米复合材料
吸附
化学工程
可见光谱
X射线光电子能谱
纳米颗粒
亚甲蓝
细菌纤维素
降级(电信)
核化学
纤维素
纳米技术
催化作用
有机化学
化学
工程类
电信
光电子学
计算机科学
作者
Xueren Qian,Yongjian Xu,Xiaopeng Yue,Wei Cai,Min Liu,Chao Duan,Xu Yang,Chao Zhu,Lei Dai
出处
期刊:Cellulose
[Springer Nature]
日期:2020-05-11
卷期号:27 (10): 5939-5954
被引量:8
标识
DOI:10.1007/s10570-020-03196-5
摘要
Bacterial cellulose (BC) is a unique nanofibrous biomaterial, and crystalline cadmium sulphide (CdS) is regarded as one of the most attractive visible light-driven photocatalysts. In this study, a BC@CdS nanocomposite for photocatalytic degradation of organic dye methylene blue (MB) was prepared with a facile and highly efficient strategy. The nanocomposite was prepared through a designed “anchoring-reacting-forming” pathway. SEM images showed that the BC-alcogel was the best matrix for nano-fabrication on which nanosized CdS particles were homogeneously distributed (approximately 100 nm). The results from FT-IR, XRD and XPS revealed that the CdS nanoparticles, mainly cubic and hexagonal crystallite, are attached to the BC fibers via coordination effect. The BC-supported adsorbent photocatalytic material was easy to be recycled and followed a new “adsorption–accumulation–degradation” mechanism of photocatalytic degradation. The results showed BC matrix had a strong adsorption effect on MB molecules, which improved local concentration of MB and promoted the rate of photocatalytic reaction. This novel adsorbent photocatalytic nanocomposite material (contained 12.4% CdS, about 0.91 mg for degradation experiment) possessed highly efficient photocatalytic activity with 77.39% removal of MB after 180 min visible light irradiation (the degradation rate was 28.3% mg−1 h−1), and exhibited satisfactory cyclic utilization with slight attenuation. Therefore, BC@CdS nanocomposite is a novel promising candidate as adsorbent photocatalysts with visible light response.
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