硫-空位修饰的0D/2D s -方案异质结的构建促进光催化还原Cr(VI

IF 8.7 1区 化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jie He, Lin Liu, Ning Fu, Yarong Zhao, Linlin Zhang, Lele Feng, Guixiang Teng, Xingang Li* and Chun Zhang*, 
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引用次数: 0

摘要

合理设计和构建s型异质结是提高光催化效率的有效策略。然而,在界面上实现有效电荷迁移的挑战仍然存在。本文采用光致分解缺陷工程策略,设计并构建了由0D Ag量子点和s-空位修饰的Bi2S3量子点与2D MnFe2O4超薄纳米片(AgQDs/BQDs-SV/MFO)组成的0D/2D S-scheme异质结光催化剂。理论计算和实验结果表明,AgQDs/BQDs-SV/MFO异质结中量子点、S空位和纳米片结构的存在显著改善了光收集、电荷分离和转移,在可见光(λ≥420 nm)照射30 min时,对Cr(VI)的光催化降解率高达99.5%,且稳定性良好。本研究为构建有效的光催化剂净化铬废水进行环境修复提供了新的思路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Construction of Sulfur-Vacancy-Modified 0D/2D S-Scheme Heterojunction for Enhancing Photocatalytic Cr(VI) Reduction

Construction of Sulfur-Vacancy-Modified 0D/2D S-Scheme Heterojunction for Enhancing Photocatalytic Cr(VI) Reduction

The rational design and construction of S-scheme heterojunctions represent an effective strategy for enhancing the photocatalytic efficiency. Nevertheless, the challenge of enabling efficient charge migration at the interface persists. Herein, a 0D/2D S-scheme heterojunction photocatalyst incorporating 0D Ag quantum dots and S-vacancy-modified Bi2S3 quantum dots with 2D MnFe2O4 ultrathin nanosheets (AgQDs/BQDs-SV/MFO) is designed and constructed via photoinduced decomposition-defect engineering strategy. Theoretical calculations and experimental results demonstrate the presence of quantum dots, S vacancies, and nanosheet structure in the AgQDs/BQDs-SV/MFO heterojunction significantly improves light harvesting, charge separation, and transfer dramatically, resulting in a high-efficiency photocatalytic degradation rate (99.5%) toward Cr(VI) under visible light irradiation (λ ≥ 420 nm) at 30 min with excellent stability. This work provides new insights for constructing effective photocatalysts for purifying Cr wastewater for environmental remediation.

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来源期刊
ACS Materials Letters
ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
14.60
自引率
3.50%
发文量
261
期刊介绍: ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.
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