ZnCr-LDHs with dual adsorption and photocatalysis capability for the removal of acid orange 7 dye in aqueous solution
ZnCr-LDHs with dual adsorption and photocatalysis capability for the removal of acid orange 7 dye in aqueous solution
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DOI：
10.1016/j.jsamd.2020.08.002
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发表时间：
2021-02-11
影响因子：
8
通讯作者：
Rafqah, Salah
中科院分区：
文献类型：
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作者：
El Mersly, Lekbira;El Mouchtari, El Mountassir;Rafqah, Salah
本研究旨在探索层状双氢氧化物（LDHs）材料在有机污染物污染沃茨处理中的应用潜力。合成了一系列ZnCr-X（X = Cl，SO 4，CO 3）水滑石，并通过动态热重分析（DRX）、红外光谱（FTIR）、比表面积（BET）、透射电镜（TEM）、紫外-可见分光光度法等手段对其进行了表征。污染物酸性橙子7（AO 7）在3种LDHs的表面都有较好的吸附效果。吸附取决于插层阴离子的性质。AO 7对插层阴离子SO 42-、CO 32-和Cl-的吸附率分别为25%、32%和49.5%。我们发现，ZnCr-SO 4 LHD是最有效的光催化剂AO 7染料分解在紫外和可见光范围内，其光催化活性在三个循环的光催化试验中得到保留。ZnCrSO 4-LDH具有优异的光催化活性、长期稳定性和良好的适用性，是一种很有前途的光催化剂。(C)2020年，任作家。Elsevier B. V.代表越南国立大学（河内）提供出版服务。
This study aims to explore the potential of layered double hydroxides (LDHs) materials for the treatment of contaminated waters by organic pollutants, using a combined dual process, namely adsorptionphotocatalysis. A series of LDHs of ZnCr-X where (X = Cl, SO4 and CO3) were synthesized and characterized by several techniques such as DRX, FTIR, BET, TEM, and UV-Visible spectrophotometry. The pollutant acid orange 7 (AO7) is efficiently adsorbed on the surface of the three LDHs. The adsorption depends on the nature of the intercalated anion. The adsorption percentage of AO7 achieved for the intercalated anions SO42-, CO32- and Cl-, was 25, 32 and 49.5% respectively. We find that ZnCr-SO4 LHD is the most effective photocatalyst for AO7 dye decomposition in the UV and visible range and its photocatalytic activity is preserved during three cycles of photocatalytic tests. Such remarkable properties allow considering ZnCrSO4-LDH as a promising photocatalyst with high activity, long-term durability and excellent applicability. (C) 2020 The Authors. Publishing services by Elsevier B.V. on behalf of Vietnam National University, Hanoi.