The visible light photocatalytic H2 evolution and degradation enhancement of g-C3N4/Er:CdSe/SiO2 ternary core-shell heterojunction with up-conversion fluorescence auxiliary

被引：7

作者：

Li, Hui ^{[1
]}

Li, Xinyan ^{[1
]}

Xu, Xiaoqing ^{[2
]}

Que, Lixin ^{[2
]}

Pan, Jiaqi ^{[2
]}

Zhu, Mei ^{[1
]}

机构：

[1] Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Peoples R China

[2] Zhejiang Sci Tech Univ, Dept Phys, Key Lab Opt Field Manipulat Zhejiang Prov, Key Lab ATMMT Minist Educ, Hangzhou 310018, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 940卷

基金：

中国国家自然科学基金;

关键词：

Photocatalytic hydrogen evolution; Photodegradation; Ternary core -shell heterojunction; Up -conversion fluorescence; POLLUTANT DEGRADATION; HOLLOW NANOSPHERES; ER3+; YB3+; NANOPARTICLES; PERFORMANCE; FABRICATION; G-C3N4;

D O I：

10.1016/j.jallcom.2023.168914

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The g-C3N4/Er:CdSe/SiO2 ternary core-shell heterojunction with up-conversion fluorescence auxiliary is fabricated via a simple chemical-calcination method. As revealed, the g-C3N4/Er:CdSe/SiO2 ternary core -shell heterojunction (g-C3N4/Er:CdSe/SiO2-3) exhibits remarkable visible light photocatalytic hydrogen evolution and photodegradation tetracycline hydrochloride enhancement than that of single CdSe (-35 folds of HER,-2 folds of photodegradation) and single g-C3N4 (-70 folds of HER,-2 folds of photo -degradation), and achieves decent photocatalytic stability. It can be mainly attributed to that, the SiO2 spheres act as optical lens and Er-doping with up-conversion fluorescence can increase solar efficiency, and the formed g-C3N4/Er:CdSe heterojunction with appropriate potential gradient can improve carrier effi-ciency, including increasing transportation, prolonging lifetime and decreasing recombination. What's more, the ternary core-shell spheroidal structure can increase active sites and photocatalytic stability.(c) 2023 Elsevier B.V. All rights reserved.

引用

页数：11

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