通过原位还原，HCrO4−和Cr2O72−对可持续负载Cr（III）催化剂的孔径依赖性吸附

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-01-11 DOI:10.1016/j.seppur.2025.131601

Yabin Wang , Ronghao Wang , Xiuping Ding , Hua He

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引用次数: 0

摘要

六价铬严重破坏了自然环境，威胁着人类健康。如何方便地处理铬（VI）并回收产生的铬基副产物是至关重要的，但仍然具有挑战性。在此，一方面，我们展示了一种可行的循环利用Cr（VI）物种的策略，即将它们从有毒转化为垃圾，进而转化为宝藏。多氨基功能化枝状介孔二氧化硅纳米颗粒（DMSNs）可以吸附铬氧阴离子（HCrO4−和Cr2O72 -），并将Cr（VI）原位还原为Cr（III）。所制得的dmsn - cr （III）作为负载型催化剂，能有效催化某些交叉偶联反应。另一方面，通过调节DMSNs的通道大小，实现了HCrO4−和Cr2O72−的孔径依赖性吸附。此外，孔径依赖性的吸附和催化性能也得到了证明。我们的研究结果不仅为污水中Cr（VI）的循环利用提供了蓝图，而且还展示了一个基于dmsn的多功能平台，该平台与潜在的结构-活性相关性相结合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Pore-size-dependent adsorption of HCrO4− and Cr2O72− towards sustainable supported Cr(III) catalysts through in-situ reduction

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Pore-size-dependent adsorption of HCrO4− and Cr2O72− towards sustainable supported Cr(III) catalysts through in-situ reduction

Hexavalent chromium has seriously destroyed the natural environment and threatened human health. It is crucial but still challengeable to dispose of Cr(VI) handily and recycle the as-generated Cr-based byproducts. Herein, on the one hand, we demonstrate a feasible strategy for cyclic utilization of Cr(VI) species by converting them from toxic to trash and further to treasure. Multiamino-functionalized dendritic mesoporous silica nanoparticles (DMSNs) can adsorb chromium oxyanion ions (HCrO₄⁻ and Cr₂O₇^2–) and in situ reduce Cr(VI) to Cr(III). The as-obtained DMSNs-Cr(III) function as supported catalysts and efficiently catalyze some cross-coupling reactions. On the other hand, pore-size-dependent adsorption of HCrO₄⁻ and Cr₂O₇²⁻ has been realized by regulating DMSNs’ channel size. Furthermore, pore-size-dependent adsorptive and catalytic performances have been demonstrated as well. Our results not only provide a blueprint for cyclic utilization of Cr(VI) in sewage, but also exhibit a versatile DMSNs-based platform that couples with potential structure–activity correlations.

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.