Reversal of the photoinduced majority carriers in polypyrrole by semiconductor-insulator-semiconductor heterostructure and related highly-efficient photoreduction of Cr(VI)

doi:10.1016/j.cej.2020.124720

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Reversal of the photoinduced majority carriers in polypyrrole by semiconductor-insulator-semiconductor heterostructure and related highly-efficient photoreduction of Cr(VI)
	Cheng, Yang ; Zhao, Zongshan ; Wu, Kui ; Zou, Tao ; Wang, Chang ; Zheng, Qi ; Song, Weijie
刊名	CHEMICAL ENGINEERING JOURNAL
	2020
卷号	393
关键词	PHOTOCATALYTIC REDUCTION SIMULTANEOUS REMOVAL HIGH-PERFORMANCE TIO2 WATER NANOPARTICLES FABRICATION CR(III) SINGLE DYES
DOI	10.1016/j.cej.2020.124720
英文摘要	The development of visible-light-responsive photo-reductant with organic conjugated-polymers is considered as a promising and efficient way to solve the current environmental pollution and energy crisis. In this work, we reports the Fe3O4@SiO2@Polypyrrole nanocomposite with semiconductor-insulator-semiconductor (S-I-S) heterostructure, which exhibited a distinct reversal of the majority-carriers' type of polypyrrole under irradiation. In addition, the photochemical activity of polypyrrole was effectively enhanced by similar to 2 times via capacitance effect derived from this heterostructure. In fact, quenching experiments revealed that the reaction pathway of polypyrrole could be subverted from photoinduced hole to mainly electron by this heterostructure. The contribution ratio of photoinduced electron in Fe3O4@SiO2@Polypyrrole's reaction system was evaluated via the photodegradation tests, which was similar to 73%. As a contrast, photoinduced hole was the only active species in polypyrrole's system. As a result, the heterostructural Fe3O4@SiO2@Polypyrrole exhibited an excellent photoreduction ability toward Cr(VI) with its enhanced photoelectron productivity, the removal ratio of Cr(VI) was 99.2% after 90 min irradiation under model sunlight. Generally, this study provides a novel strategy for designing and fabricating highly-efficient photo-reductant with a low-cost and easy way, which can be further used for the elimination of Cr(VI) in wastewaters under mild conditions.
学科主题	Engineering
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20616]
专题	2020专题
作者单位	1.Cheng, Y 2.Song, WJ (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China.
推荐引用方式 GB/T 7714	Cheng, Yang,Zhao, Zongshan,Wu, Kui,et al. Reversal of the photoinduced majority carriers in polypyrrole by semiconductor-insulator-semiconductor heterostructure and related highly-efficient photoreduction of Cr(VI)[J]. CHEMICAL ENGINEERING JOURNAL,2020,393.
APA	Cheng, Yang.,Zhao, Zongshan.,Wu, Kui.,Zou, Tao.,Wang, Chang.,...&Song, Weijie.(2020).Reversal of the photoinduced majority carriers in polypyrrole by semiconductor-insulator-semiconductor heterostructure and related highly-efficient photoreduction of Cr(VI).CHEMICAL ENGINEERING JOURNAL,393.
MLA	Cheng, Yang,et al."Reversal of the photoinduced majority carriers in polypyrrole by semiconductor-insulator-semiconductor heterostructure and related highly-efficient photoreduction of Cr(VI)".CHEMICAL ENGINEERING JOURNAL 393(2020).