Cargando…
Ferroelectric Oxide Nanocomposites with Trimodal Pore Structure for High Photocatalytic Performance
An effective method to improve the photocatalytic performances of powder catalysts is to use the internal electric field from ferroelectrics to separate photogenerated charge carriers. The design and engineering of a complex hetero-junction with a hierarchical pore structure is highly desirable for...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Singapore
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7770796/ https://www.ncbi.nlm.nih.gov/pubmed/34137963 http://dx.doi.org/10.1007/s40820-019-0268-y |
_version_ | 1783629584676159488 |
---|---|
author | Xu, Tingting Liu, Xuan Wang, Shulan Li, Li |
author_facet | Xu, Tingting Liu, Xuan Wang, Shulan Li, Li |
author_sort | Xu, Tingting |
collection | PubMed |
description | An effective method to improve the photocatalytic performances of powder catalysts is to use the internal electric field from ferroelectrics to separate photogenerated charge carriers. The design and engineering of a complex hetero-junction with a hierarchical pore structure is highly desirable for the efficient application of ferroelectric materials in photocatalysis. Here, we present a novel strategy using two templates to fabricate PbTiO(3)/TiO(2)/carbon (PTC) nanocomposites with a tunable microstructure. A hard SiO(2) template combined with an ice template followed by an appropriate pyrolysis procedure introduced trimodal (micro-, meso-, macro-) porosity. The as-prepared PTC nanocomposites with optimal mass ratio exhibited excellent photocatalytic and photoelectrochemical performances. PbTiO(3)/TiO(2) annealed at 900 °C (PTC-900) showed a MB degradation rate of 0.21 and 0.021 min(−1) under UV and visible light irradiation, which are, respectively, 7.2 and 3 times those of pure PbTiO(3). The photocurrent density of the composite catalyst is 1.48 mA cm(−2) at the potential of 1.0 V versus saturated calomel electrode, and the rates of hydrogen generation of PTC-900 are as high as 2360 and 9.6 μmol h(−1) g(−1) under UV and visible light irradiation, respectively. More importantly, the simultaneous application of ultrasound-induced mechanical waves further improved the photocatalytic reactivity. This work serves to improve understanding on the design of ferroelectric/piezoelectric photocatalysts with a hierarchical pore structure and also proposes a widely applicable strategy for the fabrication of high-performance micro–nano/nano–nano structures. [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s40820-019-0268-y) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-7770796 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Springer Singapore |
record_format | MEDLINE/PubMed |
spelling | pubmed-77707962021-06-14 Ferroelectric Oxide Nanocomposites with Trimodal Pore Structure for High Photocatalytic Performance Xu, Tingting Liu, Xuan Wang, Shulan Li, Li Nanomicro Lett Article An effective method to improve the photocatalytic performances of powder catalysts is to use the internal electric field from ferroelectrics to separate photogenerated charge carriers. The design and engineering of a complex hetero-junction with a hierarchical pore structure is highly desirable for the efficient application of ferroelectric materials in photocatalysis. Here, we present a novel strategy using two templates to fabricate PbTiO(3)/TiO(2)/carbon (PTC) nanocomposites with a tunable microstructure. A hard SiO(2) template combined with an ice template followed by an appropriate pyrolysis procedure introduced trimodal (micro-, meso-, macro-) porosity. The as-prepared PTC nanocomposites with optimal mass ratio exhibited excellent photocatalytic and photoelectrochemical performances. PbTiO(3)/TiO(2) annealed at 900 °C (PTC-900) showed a MB degradation rate of 0.21 and 0.021 min(−1) under UV and visible light irradiation, which are, respectively, 7.2 and 3 times those of pure PbTiO(3). The photocurrent density of the composite catalyst is 1.48 mA cm(−2) at the potential of 1.0 V versus saturated calomel electrode, and the rates of hydrogen generation of PTC-900 are as high as 2360 and 9.6 μmol h(−1) g(−1) under UV and visible light irradiation, respectively. More importantly, the simultaneous application of ultrasound-induced mechanical waves further improved the photocatalytic reactivity. This work serves to improve understanding on the design of ferroelectric/piezoelectric photocatalysts with a hierarchical pore structure and also proposes a widely applicable strategy for the fabrication of high-performance micro–nano/nano–nano structures. [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s40820-019-0268-y) contains supplementary material, which is available to authorized users. Springer Singapore 2019-05-04 /pmc/articles/PMC7770796/ /pubmed/34137963 http://dx.doi.org/10.1007/s40820-019-0268-y Text en © The Author(s) 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Article Xu, Tingting Liu, Xuan Wang, Shulan Li, Li Ferroelectric Oxide Nanocomposites with Trimodal Pore Structure for High Photocatalytic Performance |
title | Ferroelectric Oxide Nanocomposites with Trimodal Pore Structure for High Photocatalytic Performance |
title_full | Ferroelectric Oxide Nanocomposites with Trimodal Pore Structure for High Photocatalytic Performance |
title_fullStr | Ferroelectric Oxide Nanocomposites with Trimodal Pore Structure for High Photocatalytic Performance |
title_full_unstemmed | Ferroelectric Oxide Nanocomposites with Trimodal Pore Structure for High Photocatalytic Performance |
title_short | Ferroelectric Oxide Nanocomposites with Trimodal Pore Structure for High Photocatalytic Performance |
title_sort | ferroelectric oxide nanocomposites with trimodal pore structure for high photocatalytic performance |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7770796/ https://www.ncbi.nlm.nih.gov/pubmed/34137963 http://dx.doi.org/10.1007/s40820-019-0268-y |
work_keys_str_mv | AT xutingting ferroelectricoxidenanocompositeswithtrimodalporestructureforhighphotocatalyticperformance AT liuxuan ferroelectricoxidenanocompositeswithtrimodalporestructureforhighphotocatalyticperformance AT wangshulan ferroelectricoxidenanocompositeswithtrimodalporestructureforhighphotocatalyticperformance AT lili ferroelectricoxidenanocompositeswithtrimodalporestructureforhighphotocatalyticperformance |