CONSTRUCTION AND BUILDING MATERIALS
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2020
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IF 4.419
Qiang Gao,Xiaomei Wu,Rong Zhu
In this work, BiOCl x Br 1−x microflowers were synthesized as building blocks for superhydrophobic NIR reflective coatings. The molar ratio of Cl to Br had a great influence on the microstructure and optical properties of BiOCl x Br 1−x . As the increase of x value, the microflower structure tunes from loose to dense. The NIR solar reflectance of BiOCl x Br 1−x ranges from 0.860 to 0.935. The BiOCl x Br 1−x coatings reduced the inner temperature of the heat box by approximately 3.9 °C. Due to the three-dimensional hierarchical structure of BiOCl x Br 1−x microflowers, superhydrophobic cool coatings can be fabricated on various building materials, such as concretes, aluminum plates, and glasses. Moreover, the superhydrophobic coatings exhibit superior antifouling performance, contributing to retain high NIR reflectance of the coatings for a long time. Therefore, the prepared superhydrophobic NIR reflective coatings with superior antifouling property have great potential to be used for building energy-saving.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Haohao Chen,Mingxuan Sun,Junjie Zhao,Xiangzhi Huang,Huanying Teng,Yu Gao,Ziyang Li,Jun Li
Herein, a collection of novel N-Ti 3 C 2 /BiOCl x Br 1−x composites are fabricated via a simple in-situ sonochemical process. Not only the preparation method for N-Ti 3 C 2 but also the photocatalytic system of N-Ti 3 C 2 /BiOCl x Br 1−x are firstly developed. Multiple characterizations jointly demonstrate the successful fabrication of the composites. Compared to that of BiOCl x Br 1−x , the maximum improvements of 1.16, 1.25 and 1.26 folds are severally confirmed for the photocatalytic degradation of levofloxacin, Rhodamine B, and methylene blue over N-Ti 3 C 2 /BiOCl x Br 1−x composites. In addition, through radicals trapping tests, the primary active species in photocatalytic degradation process are verified to be O 2 − . Moreover, N-Ti 3 C 2 /BiOCl x Br 1−x composites also exhibit 1.18 and 1.14 times enhancements for NH 3 production compared with that of BiOCl x Br 1−x with or without the presence of methanol, respectively. In addition, the maximum improvements of photo-current and photo-potential for BiOCl x Br 1−x are 1.29 and 1.86 folds with the introduction of N-Ti 3 C 2 , respectively. The enhanced photocatalytic activity of N-Ti 3 C 2 /BiOCl x Br 1−x composites is owing to the heightened light absorption, increased specific surface area, and accelerated separation of photoinduced carriers. Additionally, the stable photocatalytic properties of N-Ti 3 C 2 /BiOCl x Br 1−x are confirmed by three photocatalytic recycle tests on pollutant degradation and nitrogen reduction combined with X-ray diffraction patterns before and after three recycles. This study suggests that N-Ti 3 C 2 is an efficient ornamentation for boosting photocatalytic activity of BiOCl x Br 1−x , which can also be expanded as a promising modifier for other semiconductors.
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Lu Tan,Zhenxi Yuan,Weirui Chen,Ziyi Lin,Yiming Tang,Laisheng Li,Jing Wang
In this work, a series of BiOCl x Br 1-x (BCB) solid solutions are facilely designed for visible-light-driven photocatalytic ozonation (PCO) degradation of florfenicol (FF) in water environments, which could add to the library of efficient, cost-effective and robust nanocatalysts for water purification . BCB solid solutions in the structure of 2D nanosheets are achieved involving the etching of BiOBr “micro-flowers” with HCl at different concentrations, allowing a removal ratio of FF up to 97.3 % within 1 h, superior to bare BiOBr and bare BiOCl. A strengthened synergistic effect between photocatalysis and ozonation is substantiated, where the separation of photo-induced charge transfer is accelerated, the band gap is tuned and the utilization efficiency of ozone is enhanced. This facilitates the production of reactive oxygen species identified as •OH, •O 2 – , and 1 O 2 that will attack the FF molecule for degradation based on three pathways.
研究领域:
环境科学
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材料科学
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水处理技术
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产品关联
DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2022
·Vol. 39
·期 8
·2127-2137
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IF 3.146
Luo Ze,Li Jinlong,Sui Guozhe,Zhuang Yan,Guo Dongxuan,Xu Rongping,Liang Shuang,Yao Hong,Wang Chao,Chen Shijie
Developing an efficient, environmentally friendly, and pollution-free catalyst with excellent visible light catalytic activity is a promising strategy for dye wastewater treatment. Herein, the rod-like hollow BiOCl x Br 1− x (x=1, 0.75, 0.5, 0.25, 0), with an adjustable band gap, was successfully prepared using Bi-based metal-organic framework as template. The corresponding hollow assembly and introduction of Br − imparted valuable structural advantages and intrinsic characteristics for improved photocatalytic activity. Significantly, the degradation efficiency of BiOCl 0.5 Br 0.5 for the Rhodamine B (RhB) solution reached 92% under visible light illumination for 90 min, which is considerably higher than that of CAU-17-derived Bi 2 O 3 and BiOCl. Overall, these findings shed fundamental insight on constructing novel photocatalysts with excellent visible light driven photocatalytic activity and offered a new method for treating dye wastewater.
研究领域:
材料科学
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环境科学
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光催化
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Danni Wu,Liya Zeng,Yuwei Liu,Changlai Yuan,Xiaogang Xue,Xiaowen Zhang
Newly emerged 2D metallic Ti 3 C 2 is highly spotlighted for its unique properties and ubiquitous compounding compatibility. Herein we pioneeringly demonstrate a heterojunction photocatalyst of Ti 3 C 2 /BiOCl x Br 1−x . X-ray diffraction, scanning electron microscope , transmission electron scope, and X-ray photoelectron spectroscopy analysis indicates that BiOCl x Br 1−x is successfully in-situ grown upon Ti 3 C 2 nanosheets . Visible light photocatalytic performance of 7 %-Ti 3 C 2 /BiOCl 0.25 Br 0.75 is overwhelmingly superior to BiOCl x Br 1−x with an increment of 11.9 times in the reaction rate constant of RhB photodegradation , owing to the distinctive Schottky heterojunction between Ti 3 C 2 and BiOCl x Br 1−x . UV–vis absorbance, photoluminescence , Fourier transform infrared spectra , Raman, electrochemical impedance spectra, and transient photocurrent response account for the improved utilization of visible light, effective separation of photogenerated carriers, and more photogenerated electron acceptors , which elucidate the superior photocatalytic performance and good stability of Ti 3 C 2 /BiOCl x Br 1−x . Trapping experiments and electron paramagnetic resonance tests verify that the dominant active species of·O 2- and h + are responsible for the rapid degradation of RhB. The reasonable photocatalytic mechanism of Ti 3 C 2 /BiOCl x Br 1−x is clarified based on the energy band structure and synergistic effect of the heterojunction. This work provides some novel insights into designing 2D layered heterojunction photocatalysts, boosting photocatalytic performance, and advancing Ti 3 C 2 application.
研究领域:
材料科学
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光催化
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纳米技术
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2019
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IF 2.752
Yibing Feng,Yi Du,Minxing Du,Xiuying Tian,Nan Jiang,Yang Liu
The g-C 3 N 4 /BiOCl x Br 1-x heterojunctions photocatalysts with different band gaps were successfully synthesized via a simple precipitation process. The photocatalytic activitys of the g-C 3 N 4 /BiOCl x Br 1-x composites were evaluated through the degradation of Tetracycline Hydrochloride (TC) under visible light irradiation. Compared with pure g-C 3 N 4 and BiOCl x Br 1-x , the hybrids exhibited prominently enhanced visible light photocatalytic activity for the degradation of TC. The various photocatalytic perfprmances of g-C 3 N 4 /BiCl x Br 1-x heterojunctions with same content of g-C 3 N 4 were determined by different optical absorption capabilities resulting from the band structures , which could be controlling by changing the molar ratio of Br to Cl in BiOCl x Br 1-x . The 10-CN/BiOCl 0·5 Br 0.5 (g-C 3 N 4 content: 10%) showed the highest photocatalytic activity toward TC, due to the optimal synergistic effect of bandgap structure and effective separation of electron-hole pairs. Furthermore, the capture experiments of 10-CN/BiOCl 0·5 Br 0.5 during photocatalytic reaction were also carried out, the results indicted the holes (h + ) and superoxide radicals (-O 2 - ) were the main active substances causing the enhancement of photocatalytic activity. Finally, we proposed a reasonable photocatalytic degradation of this g-C 3 N 4 /BiOCl x Br 1-x heterojunction photocatalysts .
研究领域:
材料科学
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光催化
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环境化学
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纳米材料
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能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）