In-situ synthesis of Bimetallic MOFs-derived photocatalyst CuS/CdS/rGO and its application in PAM photodegradation

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-07-23 DOI:10.1016/j.materresbull.2025.113683

Zuchao Meng , Jingyuan Shao , Jinlin Qian , Jiahua Qi , Yu Hao , Min Yang

{"title":"In-situ synthesis of Bimetallic MOFs-derived photocatalyst CuS/CdS/rGO and its application in PAM photodegradation","authors":"Zuchao Meng , Jingyuan Shao , Jinlin Qian , Jiahua Qi , Yu Hao , Min Yang","doi":"10.1016/j.materresbull.2025.113683","DOIUrl":null,"url":null,"abstract":"<div><div>During the process of oil extraction, a large amount of polyacrylamide (PAM) is used. Subsequently, these PAMs are discharged into external water bodies along with the produced water, causing significant harm to the environment. In order to improve its removal efficiency, a CuS/CdS/rGO heterojunction was prepared via in-situ sulfidation of the CuCd-MOF/GO precursors synthesized through the hydrothermal method. The structural, morphological, and optical properties of the synthesized photocatalysts were comprehensively characterized using XRD, XPS, FTIR, SEM, BET, UV–vis DRS, PL, ESR, and Mott-Schottky analyses, respectively. The photocatalytic experiment results showed that the degradation rate of polyacrylamide (PAM) due to CuS/CdS/rGO (<em>n</em>[Cu/Cd]=7:3) within 120 min was 95.8 %, which was 1.40 and 1.99 times that of CuCd-MOF and CuCd-MOF/GO, respectively. The significant enhancement of the photocatalytic performance of CuS/CdS/rGO can be attributed to its high specific surface area, well-exposed active sites, and the synergistic effects among the components. These characteristics facilitate sufficient contact between photogenerated charge carriers and reactants within the porous structure, thereby effectively reducing the recombination of photogenerated electrons and holes, which in turn improves photocatalytic efficiency. Trapping experiments suggest that superoxide radical anions (·O<sub>2</sub><sup>-</sup>) and hydroxyl radicals (·OH) play a critical role in the piezocatalytic degradation of PAM. Additionally, five cycle studies verified that the CuS/CdS/rGO nanocomposite had adequate photostability. This work provides a new perspective to fabricate high-efficient photocatalysts used in relative wastewater treatment system.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113683"},"PeriodicalIF":5.7000,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Research Bulletin","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0025540825003903","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

During the process of oil extraction, a large amount of polyacrylamide (PAM) is used. Subsequently, these PAMs are discharged into external water bodies along with the produced water, causing significant harm to the environment. In order to improve its removal efficiency, a CuS/CdS/rGO heterojunction was prepared via in-situ sulfidation of the CuCd-MOF/GO precursors synthesized through the hydrothermal method. The structural, morphological, and optical properties of the synthesized photocatalysts were comprehensively characterized using XRD, XPS, FTIR, SEM, BET, UV–vis DRS, PL, ESR, and Mott-Schottky analyses, respectively. The photocatalytic experiment results showed that the degradation rate of polyacrylamide (PAM) due to CuS/CdS/rGO (n[Cu/Cd]=7:3) within 120 min was 95.8 %, which was 1.40 and 1.99 times that of CuCd-MOF and CuCd-MOF/GO, respectively. The significant enhancement of the photocatalytic performance of CuS/CdS/rGO can be attributed to its high specific surface area, well-exposed active sites, and the synergistic effects among the components. These characteristics facilitate sufficient contact between photogenerated charge carriers and reactants within the porous structure, thereby effectively reducing the recombination of photogenerated electrons and holes, which in turn improves photocatalytic efficiency. Trapping experiments suggest that superoxide radical anions (·O₂^-) and hydroxyl radicals (·OH) play a critical role in the piezocatalytic degradation of PAM. Additionally, five cycle studies verified that the CuS/CdS/rGO nanocomposite had adequate photostability. This work provides a new perspective to fabricate high-efficient photocatalysts used in relative wastewater treatment system.

Abstract Image

查看原文本刊更多论文

双金属mofs衍生光催化剂cu /CdS/rGO的原位合成及其在PAM光降解中的应用

在榨油过程中，使用了大量的聚丙烯酰胺（PAM）。随后，这些PAMs随采出水排放到外部水体中，对环境造成重大危害。为了提高cu /CdS/rGO的去除率，将水热法合成的cud - mof /GO前驱体原位硫化制备cu /CdS/rGO异质结。采用XRD、XPS、FTIR、SEM、BET、UV-vis DRS、PL、ESR和Mott-Schottky分析对合成的光催化剂的结构、形貌和光学性能进行了全面表征。光催化实验结果表明，Cu/ CdS/rGO （n[Cu/Cd]=7:3）在120 min内对聚丙烯酰胺（PAM）的降解率为95.8%，分别是CuCd-MOF和CuCd-MOF/GO的1.40倍和1.99倍。cu /CdS/rGO光催化性能的显著增强可归因于其高比表面积、良好暴露的活性位点以及组分之间的协同作用。这些特性使得光生电荷载流子与多孔结构内的反应物充分接触，从而有效地减少了光生电子与空穴的复合，从而提高了光催化效率。捕集实验表明，超氧自由基阴离子（·O2-）和羟基自由基（·OH）在PAM的压催化降解中起关键作用。此外，五个循环研究证实了cu /CdS/rGO纳米复合材料具有足够的光稳定性。本研究为制备用于相关废水处理系统的高效光催化剂提供了新的思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.