Details
| Original language | English |
|---|---|
| Article number | 378 |
| Journal | Frontiers in Chemistry |
| Volume | 7 |
| Issue number | May |
| Early online date | 24 May 2019 |
| Publication status | Published - May 2019 |
Abstract
Bismuth oxyiodide (BiOI) is among the most potential photocatalysts due to its photocatalytic activity under visible light irradiation. However, the photoinduced carrier separation efficiency has limited the BiOI photocatalytic activity. Herein, we utilized the direct carbonation of sapless cattail grass to obtain N-doped hierarchical structure cattail-based carbon (NCC). The NCC not only served as an appropriate host but also as a self-sacrificing template for BiOI microspheres for the preparation of BiOI/NCC composite material. The acidic solutions (HCl or AcOH) were used as a solvent which helped to obtain a well-defined micro/nano hierarchical BiOI microspheres composed of ultrathin nanosheets. Thus, BiOI/NCC composites were successfully designed through the in-situ self-template rapid dissolution-recrystallization mechanism. Additionally, numerous well-contacted interfaces were formed between NCC and BiOI, which served as an electron-acceptor bridge function for ultrafast electron transfer process in order to hinder the electron-hole pairs recombination. On account of the multiple synergistic effects of micro/nano hierarchical microsphere structure, ultrathin nanosheets, and well-contacted interface, the as-prepared BiOI/NCC composites exhibit the superior degradation of rhodamine B (RhB) than pure BiOI under visible light irradiation.
Keywords
- BiOI, In-situ, Microsphere, Self-template, Ultrathin nanosheets, Visible-light photocatalysis
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
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In: Frontiers in Chemistry, Vol. 7, No. May, 378, 05.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ultrathin-Layer Structure of BiOI Microspheres Decorated on N-Doped Biochar With Efficient Photocatalytic Activity
AU - Hou, Jianhua
AU - Jiang, Ting
AU - Wei, Rui
AU - Idrees, Faryal
AU - Bahnemann, Detlef
N1 - Funding information: This work was financially supported by the National Natural Science Foundation of China (51602281), the Natural Science Foundation of Jiangsu Province (BK20160473), China Postdoctoral Science Foundation (2017M621832), the Alexander Von Humboldt Foundation (Project No. 60421802), PSF/NSFC/Eng-P-UoL(02), Yangzhou University Institute for Laboratory Environmental Protection and Intelligent Equipment and Jiangsu Ke Shi Da Laboratory Environmental Protection Technology (2018SQKF07) and Saint-Petersburg State University (Research Grant ID 39054581).
PY - 2019/5
Y1 - 2019/5
N2 - Bismuth oxyiodide (BiOI) is among the most potential photocatalysts due to its photocatalytic activity under visible light irradiation. However, the photoinduced carrier separation efficiency has limited the BiOI photocatalytic activity. Herein, we utilized the direct carbonation of sapless cattail grass to obtain N-doped hierarchical structure cattail-based carbon (NCC). The NCC not only served as an appropriate host but also as a self-sacrificing template for BiOI microspheres for the preparation of BiOI/NCC composite material. The acidic solutions (HCl or AcOH) were used as a solvent which helped to obtain a well-defined micro/nano hierarchical BiOI microspheres composed of ultrathin nanosheets. Thus, BiOI/NCC composites were successfully designed through the in-situ self-template rapid dissolution-recrystallization mechanism. Additionally, numerous well-contacted interfaces were formed between NCC and BiOI, which served as an electron-acceptor bridge function for ultrafast electron transfer process in order to hinder the electron-hole pairs recombination. On account of the multiple synergistic effects of micro/nano hierarchical microsphere structure, ultrathin nanosheets, and well-contacted interface, the as-prepared BiOI/NCC composites exhibit the superior degradation of rhodamine B (RhB) than pure BiOI under visible light irradiation.
AB - Bismuth oxyiodide (BiOI) is among the most potential photocatalysts due to its photocatalytic activity under visible light irradiation. However, the photoinduced carrier separation efficiency has limited the BiOI photocatalytic activity. Herein, we utilized the direct carbonation of sapless cattail grass to obtain N-doped hierarchical structure cattail-based carbon (NCC). The NCC not only served as an appropriate host but also as a self-sacrificing template for BiOI microspheres for the preparation of BiOI/NCC composite material. The acidic solutions (HCl or AcOH) were used as a solvent which helped to obtain a well-defined micro/nano hierarchical BiOI microspheres composed of ultrathin nanosheets. Thus, BiOI/NCC composites were successfully designed through the in-situ self-template rapid dissolution-recrystallization mechanism. Additionally, numerous well-contacted interfaces were formed between NCC and BiOI, which served as an electron-acceptor bridge function for ultrafast electron transfer process in order to hinder the electron-hole pairs recombination. On account of the multiple synergistic effects of micro/nano hierarchical microsphere structure, ultrathin nanosheets, and well-contacted interface, the as-prepared BiOI/NCC composites exhibit the superior degradation of rhodamine B (RhB) than pure BiOI under visible light irradiation.
KW - BiOI
KW - In-situ
KW - Microsphere
KW - Self-template
KW - Ultrathin nanosheets
KW - Visible-light photocatalysis
UR - http://www.scopus.com/inward/record.url?scp=85068531700&partnerID=8YFLogxK
U2 - 10.3389/fchem.2019.00378
DO - 10.3389/fchem.2019.00378
M3 - Article
VL - 7
JO - Frontiers in Chemistry
JF - Frontiers in Chemistry
SN - 2296-2646
IS - May
M1 - 378
ER -