Construction of UiO-66-NH2 decorated by MoS2 QDs as photocatalyst for rapid and effective visible-light driven Cr(VI) reduction
The photoactive metal-organic frameworks (MOFs) are good candidates for photocatalysts, but the quick electron-hole pairs recombination has greatly restricted the photocatalytic ability of MOFs. To improve the photoactivity of MOFs, MOFs-based composite materials have been extensively studied. Here,...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651323008084 |
| _version_ | 1827816158479253504 |
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| author | Tianqun Song Shuang Wang Wanting Gao Chudi Zhang Yixin Xu Xin Lin Mei Yang |
| author_facet | Tianqun Song Shuang Wang Wanting Gao Chudi Zhang Yixin Xu Xin Lin Mei Yang |
| author_sort | Tianqun Song |
| collection | DOAJ |
| description | The photoactive metal-organic frameworks (MOFs) are good candidates for photocatalysts, but the quick electron-hole pairs recombination has greatly restricted the photocatalytic ability of MOFs. To improve the photoactivity of MOFs, MOFs-based composite materials have been extensively studied. Here, we successfully integrated MoS2 quantum dots (QDs) with UiO-66-NH2 for the first time under hydrothermal conditions. The as-prepared MoS2 QDs/UiO-66-NH2 (MS-U) had good visible light response ability (absorption edge at 445 nm), and charge separation and transfer ability, which lays the foundation for the photocatalytic Cr(VI) reduction. Photocatalytic studies revealed that MoS2 QDs-5/UiO-66-NH2 (MS-U-5) had superior Cr(VI) reduction activity than pure MoS2 QDs and UiO-66-NH2. MS-U-5 could remove 98% Cr(VI) at pH= 2 with visible light irradiation for 20 min, which is the fastest visible light driven Cr(VI) reduction rate among the reported MOFs-based composite photocatalysts without the presence of any cocatalysts or scavengers as far as we know. Importantly, MS-U-5 could be reused at least three times. In the end, the possible electron transfer path and mechanism of Cr(VI) reduction was also investigated. |
| first_indexed | 2024-03-12T00:10:50Z |
| format | Article |
| id | doaj.art-1706ef5467874fa48870bb942226867e |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-03-12T00:10:50Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-1706ef5467874fa48870bb942226867e2023-09-16T05:28:29ZengElsevierEcotoxicology and Environmental Safety0147-65132023-09-01263115304Construction of UiO-66-NH2 decorated by MoS2 QDs as photocatalyst for rapid and effective visible-light driven Cr(VI) reductionTianqun Song0Shuang Wang1Wanting Gao2Chudi Zhang3Yixin Xu4Xin Lin5Mei Yang6School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China; Tianjin University of Technology, Tianjin 300384, China; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China; Corresponding author.The photoactive metal-organic frameworks (MOFs) are good candidates for photocatalysts, but the quick electron-hole pairs recombination has greatly restricted the photocatalytic ability of MOFs. To improve the photoactivity of MOFs, MOFs-based composite materials have been extensively studied. Here, we successfully integrated MoS2 quantum dots (QDs) with UiO-66-NH2 for the first time under hydrothermal conditions. The as-prepared MoS2 QDs/UiO-66-NH2 (MS-U) had good visible light response ability (absorption edge at 445 nm), and charge separation and transfer ability, which lays the foundation for the photocatalytic Cr(VI) reduction. Photocatalytic studies revealed that MoS2 QDs-5/UiO-66-NH2 (MS-U-5) had superior Cr(VI) reduction activity than pure MoS2 QDs and UiO-66-NH2. MS-U-5 could remove 98% Cr(VI) at pH= 2 with visible light irradiation for 20 min, which is the fastest visible light driven Cr(VI) reduction rate among the reported MOFs-based composite photocatalysts without the presence of any cocatalysts or scavengers as far as we know. Importantly, MS-U-5 could be reused at least three times. In the end, the possible electron transfer path and mechanism of Cr(VI) reduction was also investigated.http://www.sciencedirect.com/science/article/pii/S0147651323008084PhotocatalysisMetal-organic frameworksMoS2 quantum dotsCharge transferCr(VI) reduction |
| spellingShingle | Tianqun Song Shuang Wang Wanting Gao Chudi Zhang Yixin Xu Xin Lin Mei Yang Construction of UiO-66-NH2 decorated by MoS2 QDs as photocatalyst for rapid and effective visible-light driven Cr(VI) reduction Ecotoxicology and Environmental Safety Photocatalysis Metal-organic frameworks MoS2 quantum dots Charge transfer Cr(VI) reduction |
| title | Construction of UiO-66-NH2 decorated by MoS2 QDs as photocatalyst for rapid and effective visible-light driven Cr(VI) reduction |
| title_full | Construction of UiO-66-NH2 decorated by MoS2 QDs as photocatalyst for rapid and effective visible-light driven Cr(VI) reduction |
| title_fullStr | Construction of UiO-66-NH2 decorated by MoS2 QDs as photocatalyst for rapid and effective visible-light driven Cr(VI) reduction |
| title_full_unstemmed | Construction of UiO-66-NH2 decorated by MoS2 QDs as photocatalyst for rapid and effective visible-light driven Cr(VI) reduction |
| title_short | Construction of UiO-66-NH2 decorated by MoS2 QDs as photocatalyst for rapid and effective visible-light driven Cr(VI) reduction |
| title_sort | construction of uio 66 nh2 decorated by mos2 qds as photocatalyst for rapid and effective visible light driven cr vi reduction |
| topic | Photocatalysis Metal-organic frameworks MoS2 quantum dots Charge transfer Cr(VI) reduction |
| url | http://www.sciencedirect.com/science/article/pii/S0147651323008084 |
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