Publication Date:
2019
Description:
〈p〉Publication date: 25 November 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Journal of Alloys and Compounds, Volume 810〈/p〉
〈p〉Author(s): Shuying Dong, Longji Xia, Fangyuan Zhang, Fengzi Li, Yuyao Wang, Lingfang Cui, Jinglan Feng, Jianhui Sun〈/p〉
〈div xml:lang="en"〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉The ZnSn(OH)〈sub〉6〈/sub〉 nanocubes were prepared under different pH (3–12.4) by liquid precipitation, well characterized and further used for wastewater treatment. The results indicated that the ZnSn(OH)〈sub〉6〈/sub〉 nanocubes prepared at pH = 11.1 possessed of uniform size distribution and excellent photocatalytic activity, the degradation efficiency to MB reaches 76.3% after 5 h natural sunlight irradiation. Subsequently, the prepared ZnSn(OH)〈sub〉6〈/sub〉 nanocubes was further thermal treated (200 °C, 24 h) in four different solvents, containing deionized water, stock solution, mixed solution (V〈sub〉water〈/sub〉: V〈sub〉ethanol〈/sub〉: V〈sub〉glacial acetic acid〈/sub〉 = 3:1:1) and ethanol, named as H-1, H-2, H-3 and H-4, respectively. H-2 and H-3 showed superior photocatalytic performance and the removal efficiency of MB improved to be almost 100%, as well as red-shifted light absorption edge and the band gap energies reduced 0.9 and 0.93 eV, respectively. Moreover, free radical capture experiments showed that the h〈sup〉+〈/sup〉 and ·O〈sub〉2〈/sub〉〈sup〉−〈/sup〉 are the main active species for the ZnSn(OH)〈sub〉6〈/sub〉 nanocubes and H-2, respectively, while all these three ·OH, ·O〈sub〉2〈/sub〉〈sup〉−〈/sup〉 and 〈sup〉1〈/sup〉O〈sub〉2〈/sub〉 radicals for H-3. Those results suggested that both pH regulation and thermal treatment could efficiently improve the microscopic morphology, crystal structure and photocatalytic activity of the ZnSn(OH)〈sub〉6〈/sub〉, which might pave the way for the artful design of other high-performance catalysts.〈/p〉〈/div〉
〈/div〉
〈h5〉Graphical abstract〈/h5〉
〈div〉〈p〉〈figure〉〈img src="https://ars.els-cdn.com/content/image/1-s2.0-S0925838819332013-fx1.jpg" width="312" alt="Image 1" title="Image 1"〉〈/figure〉〈/p〉〈/div〉
Print ISSN:
0925-8388
Electronic ISSN:
1873-4669
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
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