Synergistic effect of nanoflower-like CdS for removal of highly toxic aqueous Cr(VI)
Synergistic effect of nanoflower-like CdS for removal of highly toxic aqueous Cr(VI)
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纳米花状 CdS 去除剧毒 Cr(VI) 水溶液的协同效应
DOI：
10.1016/j.matlet.2020.127734
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发表时间：
2020
影响因子：
3
通讯作者：
Roy A
中科院分区：
文献类型：
--
作者：
Roy A
本文报道了硫代硫酸钠辅助水热法制备纳米花状CdS（NFs）的合成及其对水中有毒Cr（VI）的高效去除性能。室温下，CdS纳米纤维通过光催化还原和吸附表现出协同行为，可以去除水溶液中有毒的Cr（VI）并还原为无毒的Cr（III）离子状态。在pH = 2时，Cr（VI）从水溶液中的吸附稳定时间为120 min，吸附效率为92%。进一步应用各种吸附动力学和等温模型来理解吸附机理。吸附过程符合准二级动力学和Langmuir平衡吸附等温线模型。这些结果证实了在不使用任何昂贵的贵金属基催化剂的情况下，在水修复中去除有毒Cr（VI）的可能性。
Thiourea assisted hydrothermal preparation of nanoflower-like CdS (NFs) synthesis and its efficient performance to remove toxic Cr (VI) in aqueous solution has been reported in this article. CdS NFs show synergistic behaviourviaphoto-catalytic reduction and adsorption to remove the toxic Cr (VI) and reduce to non-toxic Cr (III) ionic state in the aqueous solution at the room temperature. The adsorption of Cr (VI) from the aqueous solution stable time was observed ~120 min at the pH of 2 having an adsorption efficiency of 92%. Various adsorptions of kinetic and isothermal models have been further applied to understand the adsorption mechanism. The pseudo-second-order kinetic and Langmuir equilibrium adsorption isotherm model fitted best to describe Cr (VI) adsorption process. These results confirm the possibility of toxic Cr (VI) removal in water remediation without employing any costly noble metal-based catalyst.