CuInS2 quantum dots anchored onto the three-dimensional flexible self-supporting graphene oxide array with regulatable crystallinity and defect density for efficient photocatalytic synthesis of xylonic acid

被引：42

作者：

Liu, Kangning ^{[1
]}

Liu, Zhendong ^{[1
]}

Yao, Shuangquan ^{[2
]}

Sun, Shaolong ^{[3
]}

Ma, Jiliang ^{[1
,2
,4
]}

Sun, Runcang ^{[1
]}

机构：

[1] Dalian Polytech Univ, Coll Light Ind & Chem Engn, Liaoning Collaborat Innovat Ctr Lignocellulos Bior, Liaoning Key Lab Lignocellulose Chem & Biomat, Dalian 116034, Peoples R China

[2] Guangxi Univ, Coll Light Ind & Food Engn, Guangxi Key Lab Clean Pulp & Papermaking & Pollut, Nanning 530004, Peoples R China

[3] South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China

[4] Natl Forestry & Grassland Adm, Key Lab Plant Fiber Funct Mat, Fuzhou 350108, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2022年 / 316卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Photocatalytic biorefinery; Xylonic acid; I-III-VI quantum dots; Graphene oxide; CuInS2 quantum dots; HYDROGEN-PRODUCTION; HYBRID;

D O I：

10.1016/j.apcatb.2022.121573

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：

Photocatalytic biorefinery is receiving increasing attention as a promising approach for biomass utilization. In this field, I-III-VI quantum dots have emerged as efficient photocatalysts with unique physical and chemical properties that stem from their quantum and size effects. To fully exploit the advantages of quantum dots, a three-dimensional flexible self-supporting material (CIS@FSM) is fabricated with the assistance of defect-rich graphene oxide (GO), which is employed as a supporter to trap the quantum dots and promote charge separation/migration. Under visible-light irradiation, a xylonic acid yield of 65.05 % is obtained and no obvious decline of the photocatalytic performance is observed after nine runs. Moreover, the photocatalytic performance of CIS@FSM can be tuned by modulating the crystallinity and defect density. The investigation of the mechanism of the xylonic acid production reveals the presence of all oxidation active species, with h+ playing the primary role. This work provides insights for semiconductor-based photocatalytic biorefinery.

引用

页数：10