Recycling heavy metal ions by ultrathin nanosheet-assembled calcium silicate hydrate for the degradation of organic pollutants in wastewater via Fenton-like reactions
Recycling heavy metal ions by ultrathin nanosheet-assembled calcium silicate hydrate for the degradation of organic pollutants in wastewater via Fenton-like reactions
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DOI：
10.1016/j.colsurfa.2023.132871
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发表时间：
2024-02
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通讯作者：
Yujin Xing;Huabin Chen;Shicheng Liu;Wenzhong Wang;Yujie Liang;Junli Fu;Qing Zhou;Lijuan Wang-Lijuan
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作者：
Yujin Xing;Huabin Chen;Shicheng Liu;Wenzhong Wang;Yujie Liang;Junli Fu;Qing Zhou;Lijuan Wang-Lijuan
通过低成本、易获取和高性能的技术协同去除重金属离子和有机污染物是非常需要的。在这里，我们展示了一种简单的“吸附剂到催化剂”转化策略，用于芬顿类有机污染物的降解，该策略使用分层纳米片组装水合硅酸钙（CSH）结构，该结构通过简单的一步室温固相法大规模制备。层次化CSH结构对Ni2+、Cu2+、Co2+的吸附能力分别为406、330和264 mg·g−1。CSH结构释放的Ca2+与重金属离子发生离子交换，使CSH具有优异的吸附性能。此外，作为一个案例研究，收集的CSH-Cu可以通过在450°C的简单加热转化为催化剂。所制得的催化剂对罗丹明B具有优异的类芬顿降解能力，在60 min内降解效率约为90%。本研究为高效水净化提供了一种“吸附-催化剂”的环保策略。
It is highly desirable to synergistically remove heavy metal ions and organic pollutants by low-cost, easy-access and high-performance technique. Here, we demonstrate a facile “adsorbent-to-catalyst” conversion strategy for Fenton-like degradation of organic pollutants using hierarchically nanosheet-assembled calcium silicate hydrate (CSH) architectures, which are prepared in large scale by a simple one-step room-temperature solid-phase method. The hierarchical CSH architectures exhibit excellent adsorption capacity for Ni2+, Cu2+, Co2+with adsorption capacities of 406, 330 and 264 mg·g−1, respectively. The excellent adsorption capability results from the ion exchange between heavy metal ions and Ca2+released by CSH architectures. Furthermore, as a case study, the collected CSH-Cu can be converted into a catalyst by simply heating at 450 °C. The resulted catalyst exhibits an excellent Fenton-like degradation ability for Rhodamine B with an efficiency of about 90% within 60 min. This study provides an environmentally friendly strategy of “adsorbent-to-catalyst” for efficient water purification.