Excellent synergistic effect of adsorption and photocatalytic degradation from the novel Cu 3 SnS 4 @C nano-heterostruct
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Excellent synergistic effect of adsorption and photocatalytic degradation from the novel Cu3SnS4@C nano‑heterostructure Yan Li1 · Li‑Juan Jian1 · Xue Li1 · Fang‑Ting Liu1 · Xiao‑Fei Dong1 · Jian Wang1 · Yun Zhao1 · Cheng‑Wei Wang1 Received: 24 August 2020 / Accepted: 23 September 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract A new sphere-like nano-heterostructure of Cu3SnS4@C (CTS@C) was well designed and fabricated by two-step hydrothermal route, which is ideally suited for synergistic physical adsorption and photodegradation of anionic dye. Compared to the pure C or CTS nanospheres, CTS@C nano-heterostructure has smaller surface area but exhibits excellent performance. It possesses high adsorption efficiency of 97.04% for removal of methyl orange (MO) at pH 5.5. And also, the superior synergistic adsorption and photodegradation performance makes it exhibit 99.38% degradation efficiency within 210 min at pH 7.5, which is about 1.8 times higher than that of simplex adsorption (56.23%). These might be attributed to the higher light harvesting, effective charge separation, lower charge-transfer resistance and high photocurrent response properties of CTS@C nanostructures. Moreover, the CTS@C nano-heterostructured photocatalyst can effectively avoid surface passivation during the process of synergistic adsorption and photodegradation, and be easily regenerated from the reaction system for recycling, suggesting a promising candidates for synergistic adsorption and photocatalysis applications. Keywords Cu3SnS4 · C nanospheres · Nano-heterostructure · Synergistic adsorption and photodegradation · Photocatalysis
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s1114 4-020-01878-6) contains supplementary material, which is available to authorized users. * Yan Li liyan‑[email protected] 1
Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, People’s Republic of China
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Reaction Kinetics, Mechanisms and Catalysis
Introduction Among various strategies of treating dye effluents, adsorption removal is regarded as the most common and promising approach owing to its advantages of high efficiency, easy operation, ample availability, low cost and environmental protection [1–5]. But, adsorption function is merely to collect the pollutants on the surface of adsorbent without mineralizing or degrading them, and as the adsorbents, it needs to be treated to release the dyestuff for regeneration [6–8], which is generally difficult, and therefore becomes a limitation in applications. Thus, it is more valuable, yet challengeable to design and construct new nanostructure which has characters of both better adsorption and regeneration capacities for removal of the pollutants. As we know, heterogeneous photocatalysis, an ideal technology with clean and economizing energy for remedying environmental pollutio
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