Synthesis of graphene quantum dots doped CdS composites for photoelectric properties

被引：3

作者：

Lei, Yun ^{[1
]}

Lin, Yuanyuan ^{[1
]}

Wang, Jinyang ^{[1
]}

Zhang, Zheng ^{[1
]}

Jiang, Zicong ^{[1
]}

Ouyang, Zhong ^{[1
]}

Hu, Jiaxin ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China

来源：

MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 12期

基金：

中国国家自然科学基金;

关键词：

CdS/GQDs composites; GQDs contents; optical property; photoelectric response; SOLVOTHERMAL SYNTHESIS; PHOTOCATALYST; NANOCRYSTALS; PERFORMANCE; OXIDE; ELECTROCHEMILUMINESCENCE;

D O I：

10.1088/2053-1591/ab561b

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cadmium sulfide/ graphene quantum dots (CdS/GQDs) composites were fabricated by a simple one-step solvothermal method using cadmium acetate and thiourea as precursors for Cd and S, respectively. GQDs were compounded with CdS, which resulted in a decrease in zeta potential. The lattice fringes of 0.34 nm and 0.33 nm were ascribed to the (002) direction of GQDs and CdS, respectively. The UV absorption spectrum of CdS/GQDs composites presented a red-shifted, and the photoluminescence intensity of CdS/GQDs composites declined upon the addition of GQDs. The photoelectric properties of CdS/GQDs composites were significantly stronger than those of pure CdS. The relationships between photoelectric responses and the contents of GQDs were investigated. The photocurrent density reached a maximum of 3.58;;10(?6) A cm(?2) when the content of GQDs was 0.4 wt%, but the photocurrent density of pure CdS was 0.15;;<i 10(?6) A cm(?2). The photocurrent value was 23 times higher than that of pure CdS. Meanwhile, the impedance value achieved the minimum.

引用

页数：8

共 35 条

[1] A CdTe/CdS quantum dots amplified graphene quantum dots anodic electrochemiluminescence platform and the application for ascorbic acid detection in fruits [J].