Fabrication of alginate-derived MoS2@C photocatalyst with enhanced visible-light activity for tetracycline degradation

IF 2.5 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jingkun Zhao, Shuaikang Yao, Yingjie Huang, Siyu Gao, Shangru Zhai, Qingda An, Zuoyi Xiao, Feng Zhang
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Abstract

It is undoubtedly a challenge to design an efficient and recyclable photocatalyst for the degradation of tetracycline (TC). In this study, a MoS2@C composite catalyst was fabricated through the simple sulfurization of alginate-based spheres encapsulating ammonium molybdate by thiourea. The incorporation of porous carbon as a co-catalyst significantly augmented reactive active sites, endowing it with great specific surface area and effectively preventing the aggregation of MoS2 nanoparticles. While offering abundant catalytic sites for the reaction, the structure with interconnected channels promoted the adsorption of the reactant. The MoS2@C composites showed excellent photocatalytic performance, achieving a photodegradation ratio of 87.01% for TC within 60 min, superior to that of pure MoS2. Additionally, the photocatalytic mechanism for the degradation of TC was also investigated through free radical trapping experiments in combination with the electron spin resonance technique.

海藻酸盐衍生的具有增强可见光活性的四环素降解光催化剂MoS2@C的制备
设计一种高效、可回收的降解四环素的光催化剂无疑是一个挑战。本研究通过硫脲包封钼酸铵的藻酸盐基球简单硫化制备了MoS2@C复合催化剂。多孔碳作为助催化剂的掺入显著增加了反应活性位点,使其具有较大的比表面积,有效地阻止了MoS2纳米颗粒的聚集。在为反应提供丰富的催化位点的同时,具有连通通道的结构促进了反应物的吸附。MoS2@C复合材料表现出优异的光催化性能,在60 min内对TC的光降解率达到87.01%,优于纯MoS2。此外,通过自由基捕获实验结合电子自旋共振技术研究了光催化降解TC的机理。
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来源期刊
Frontiers of Materials Science
Frontiers of Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
4.20
自引率
3.70%
发文量
515
期刊介绍: Frontiers of Materials Science is a peer-reviewed international journal that publishes high quality reviews/mini-reviews, full-length research papers, and short Communications recording the latest pioneering studies on all aspects of materials science. It aims at providing a forum to promote communication and exchange between scientists in the worldwide materials science community. The subjects are seen from international and interdisciplinary perspectives covering areas including (but not limited to): Biomaterials including biomimetics and biomineralization; Nano materials; Polymers and composites; New metallic materials; Advanced ceramics; Materials modeling and computation; Frontier materials synthesis and characterization; Novel methods for materials manufacturing; Materials performance; Materials applications in energy, information and biotechnology.
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