A tunable optoelectronic nanofibrillated cellulose/CdS quantum dot film with improved transmittance and strength

被引：18
作者：
Yan, Chang-yuan [1 ]
Fang, Zhi-qiang [1 ]
Tang, Ai-min [1 ]
Liu, Wang-yu [2 ]
Liu, Yuan [1 ]
Shi, Hai-zhen [1 ]
机构：
[1] South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Guangdong, Peoples R China
来源：
CELLULOSE | 2018年 / 25卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Nanofibrillated cellulose; CdS quantum dots; Carboxyl groups; Light transmittance; Elastic modulus; Optoelectronic films; TEMPO-MEDIATED OXIDATION; IN-SITU SYNTHESIS; THIN-FILMS; NANOPARTICLES; NANOCRYSTALS; TRANSPARENT; NANOFIBERS; NANOCOMPOSITES; ELECTRODES;
D O I：
10.1007/s10570-018-1727-1
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
Nanofibrillated cellulose (NFC) is an ideal building block in novel bio-based nanomaterials fabrication for various emerging applications. In this study, a biomass-based optoelectronic material of cadmium sulfide (CdS) quantum dots (QDs)-decorated TEMPO oxidized NFC was prepared by an in situ electrostatic adsorption method. The NFC/CdS QDs suspensions were then vacuum-filtrated to produce NFC/CdS QDs composite films. The morphology of the NFC/CdS QDs composites and their crystalline degree were studied by TEM and XRD measurement, respectively, and the mechanical and optoelectronic properties of the films were also investigated. The results indicated NFC/CdS QDs composite films exhibited excellent light transmittance and high elastic modulus while retaining prominent flexibility, superior optical and physical properties of pure NFC film. The light transmittance can be as high as 95% at 550 nm, and the elastic modulus reached up to 8.1 GPa. Homogeneous dispersion of CdS QDs with different size were obtained by varying carboxyl contents (molar ratio of COO-:Cd2+ is 2:1), resulting in the tailored photoelectric effect of NFC/CdS QDs composite films. The photocurrent can be tuned from 0.71 to 1.98 mu A. These results show great potential to extend the application of NFC in next-generation green flexible electronics, photocatalytic materials, and nanoscale photosensor.
引用
收藏
页码：2405 / 2417
页数：13
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