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Enhanced photocatalytic performance of heterogeneous hydrotalcite by spontaneously polarized ferroelectric.

Abstract：

:Two-dimensional photocatalytic materials have attracted great attention due to their large specific surface area and abundant active sites. Suppressing the recombination of photo-excited carriers is an effective approach to improve the performances of photocatalytic materials. Herein, we introduced ferroelectric PbTiO3 into the two-dimensional layered double hydroxides (LDHs) to improve the carrier separation efficiency and photocatalytic performances. A built-in electric field was generated in the polarized PbTiO3, resulting in the improvement of the carrier separation efficiency and the promotion of the lifetime of photo-excited carriers in the LDHs-PbTiO3 composites. As a result, the LDHs-PbTiO3 composites showed the decent photocatalytic performances towards water splitting under visible light irradiation. The oxygen production rate of the proposed LDHs-PbTiO3 composites was almost twice than that of pristine LDHs. These results have addressed the significance of photo-excited carriers in photocatalytic materials. This approach could undoubtedly provide the valuable information in design and construction of high efficiency photocatalysts.

journal_name

J Colloid Interface Sci

journal_title

Journal of colloid and interface science

authors

Zheng M,Xu Q,Tian R,Lu C

doi

10.1016/j.jcis.2021.05.040

keywords:

["Built-in electrical field","Carrier separation","Ferroelectric","Layered double hydroxides","Photocatalysis"]

subject

Has Abstract

pub_date

2021-10-15 00:00:00

pages

473-479

eissn

0021-9797

issn

1095-7103

pii

S0021-9797(21)00712-8

journal_volume

600

pub_type

杂志文章

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