Magnetically separable NiFe2O4/Ag3VO4/Ag2VO2PO4 direct Z-scheme heterostructure with enhanced visible-light photoactivity

被引：21

作者：

Su, Changhua ^{[2
]}

Zhang, Dafeng ^{[2
]}

Pu, Xipeng ^{[2
]}

He, Zhuang

Hu, Xun ^{[3
]}

Li, Lei ^{[4
]}

Hu, Guangzhi ^{[1
,4
]}

机构：

[1] Yunnan Univ, Sch Ecol & Environm Sci, Inst Ecol Res & Pollut Control Plateau Lakes, Kunming 650504, Yunnan, Peoples R China

[2] Liaocheng Univ, Shandong Prov Key Lab Chem Energy Storage & Novel, Sch Mat Sci & Engn, Liaocheng, Shandong, Peoples R China

[3] Univ Jinan, Sch Mat Sci & Engn, Jinan, Shandong, Peoples R China

[4] Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing, Peoples R China

来源：

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY | 2021年 / 96卷 / 10期

关键词：

NiFe2O4; Ag3VO4; Ag2VO2PO4; chemical etching; heterojunction; photocatalyst; magnetic; P-N HETEROJUNCTION; GRAPHITIC CARBON NITRIDE; IN-SITU GROWTH; PHOTOCATALYTIC ACTIVITY; COMBUSTION SYNTHESIS; DEGRADATION; FABRICATION; COMPOSITE; NIFE2O4; MICROSTRUCTURE;

D O I：

10.1002/jctb.6855

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

BACKGROUND The occurrence of organic contaminants in surface water has drawn great concern in recent years. The construction of a heterostructure has been shown to improve photoactivity by boosting the separation of photogenerated charge carriers. In this work, magnetically separable NiFe2O4/Ag3VO4/Ag2VO2PO4 (NFO/AVO/AVPO) heterojunction photocatalysts were synthesized via a chemical etching method in ammonia solution of different concentrations, using NFO/AVPO as the source material. The magnetic NFO/AVO/AVPO not only endows magnetic recoverability using an external magnetic field, but also possesses a heterojunction, boosting the separation of photoinduced charges. RESULTS Compared with NFO, AVPO and NFO/AVPO, NFO/AVO/AVPO composites as synthesized show improved visible-light photoactivities. At the optimum concentration (0.15 mol L-1) of ammonia solution, the NFO/AVO/AVPO shows 8.5 and 10.7 times improved photodegradation efficiency for methylene blue and imidacloprid than that of pristine NFO/AVPO, respectively. Due to the presence of magnetic NiFe2O4, the NFO/AVO/AVPO can be magnetically separated easily from the photoreaction system using a magnet. The improved photoactivity can be attributed to the formation of a direct Z-scheme heterojunction, which boosts the separation of photoinduced electron-hole pairs. CONCLUSION This work not only opens up a new method to fabricate heterojunction photocatalysts, but also paves the way for designing advanced magnetically separable photocatalysts with improved photoactivity. (c) 2021 Society of Chemical Industry (SCI).

引用

页码：2976 / 2985

页数：10

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