文献类型：期刊文献

英文题名：Preparation of "green" carbon quantum dots coated core-shell type pearl pigment Kieselguhr@TiO2@TiO2-x

作者：Zhao, Yue[1];Yang, Yuxiang[1,3];Liu, Wenwen[1];Kang, Shizhao[2];Huang, Yan[1];Zhao, Yi[1];Dai, Anbang[3];Carlini, Riccardo[4]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Shanghai Inst Technol, Sch Chem & Environm Engn, 100 Haiquan Rd, Shanghai 201418, Peoples R China;[3]Nanjing Univ, Nanjing 210093, Peoples R China;[4]Genoa Univ, Chem & Ind Chem Dept, I-16146 Genoa, Italy

年份：2020

卷号：242

外文期刊名：MATERIALS CHEMISTRY AND PHYSICS

收录：;EI(收录号：20200207994026);WOS:【SCI-EXPANDED(收录号:WOS:000514749800060)】；

基金：The authors are grateful to the financial support from National Natural Science Foundation of China (Grant No. 29201004) and to Mr Xiang-nong Liu, at the Analysis & Testing Center, Yangzhou University for help in sample characterization.

语种：英文

外文关键词：Pearlescent pigment; Co-precipitation; Coated composite pigment; Nanoparticles in green application; Kieselguhr@TiO2

摘要：In this paper, the green and environmentally friendly pearlescent pigment particles of the core-shell type Ideselguhr@TiO2@TiO2-x composite were prepared via sol-gel deposition method, the surface of kieselguhr coated by TiO2, and then the surface of the composites was coated with TiO2-x by the technique of co-precipitation and the route of pyrolysis of the hydrazine salt. Orthogonal design method was employed to study the effects of different operating parameters on properties of the core-shell type kieselguhr@TiO2@TiO2-x composite. Due to characteristics of large specific surface with a lot of hydroxyl groups, the composite pigment were coated with Carbon dots with the assistance of (3-aminopropyl)trimethoxysilane (APS). Thus, the prepared composite pigment was mixed with citric acid and APS followed by hydrothermal reaction at 180 degrees C to generate carbon quantum dots coated composite pigment (kieselguhr@TiO2@TiO2-x@CDs). The obtained kieselguhr@TiO2@TiO2-x@CDs composite were characterized by X ray powder diffraction (XRD), element analysis, Raman spectra analysis, Hitachi s4800 field emission scanning electron microscopy (FESEM), X ray photoelectron spectroscopy (EDS) and TG-DTA respectively. And the color instrumental measurement was used to determine L*, a* and b* value of a pigment to evaluate the color brightness of the coreshell type kieselguhr@TiO2@TiO2-x composite. In addition, the MTT method, also known as MTT colorimetry, is a way of detecting cell survival and growth, which was employed to study in vitro cytotoxicity of their composite particles against mouse peritoneal macrophages for evaluation of their green application.