In-situ synthesis of structurally oriented hierarchical UiO-66(-NH2)/CdIn2S4/CaIn2S4 heterostructure with dual S-scheme engineering for photocatalytic renewable H2 production and asulam degradation

被引：52

作者：

Bariki, Ranjit ^{[1
]}

Pradhan, Sibun Kumar ^{[1
]}

Panda, Saumyaranjan ^{[1
]}

Nayak, Swagat Kumar ^{[1
]}

Majhi, Dibyananda ^{[1
]}

Das, Krishnendu ^{[1
]}

Mishra, B. G. ^{[1
]}

机构：

[1] Natl Inst Technol, Dept Chem, Rourkela 769008, Odisha, India

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2023年 / 314卷

关键词：

Metal-organic framework; dual S-scheme; H; 2; evolution; S-vacancy; Asulam photodegradation; METAL-ORGANIC FRAMEWORKS; PERFORMANCE; SUNLIGHT; SYSTEM;

D O I：

10.1016/j.seppur.2023.123558

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The in-situ fabrication of dual S-scheme ternary heterostructure is a promising approach to isolate photo-induced electron-hole and boost the efficiency of a semiconductor photocatalyst. However, the dual S-scheme hetero-structure based on MOFs are rarely narrated. Herein, a S-vacancy rich hierarchical UiO-66(-NH2)/CdIn2S4/ CaIn2S4 ternary hybrid material is successfully fabricated by in-situ preferential growth of ultrathin CaIn2S4 nanosheets and CdIn2S4 nanorods in presence of UiO-66(-NH2) (UN) spherical nanoparticles by using a simple reflux route. The physiochemical characteristics and optoelectronic features of the developed materials are illustrated in detail. The efficacy of UiO-66(-NH2)/CdIn2S4/CaIn2S4 ternary hybrid material is explored for photocatalytic H2 evolution reaction and decontamination of asulam (ASM) herbicide. The development of S-vacancy facilitates interfacial charge carrier migration and reduces the recombination rate. The enhanced photocatalytic H2 production and ASM degradation could be ascribed to staggered band alignment between UiO-66(-NH2) (UN), CdIn2S4 (CDS) and CaIn2S4 (CAS), which support S-scheme charge channelization in the het-erojunction. Due to its physio-chemical advantages, the optimal 15UN/CDS/CAS30 hybrid photocatalyst exhibits highest photocatalytic H2 evolution rate of 4931 mu mol g- 1h- 1 with apparent conversion efficiency of 31.5% and ASM degradation > 93% (k = 0.02 min-1) under irradiation of visible light. This work furnishes a new perceptive into the in-situ construction of dual S-scheme photocatalytic systems for renewable energy production and decontamination of organic pollutants. In addition, this study for the first time illustrates mineralization of Asulam using a heterogeneous photocatalytic route.

引用

页数：14