APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Qing Sun,Meilin Ke,Yingjie Zhao,Bin Wang,Jian Zhang,Jiawei Sheng
Improving the ability of photocatalysts to capture and degrade dye pollutants is essential for the development of photocatalytic technology. Herein, a Bi 2 MoO 6 belt-like morphology with significantly enhanced visible light photocatalytic performance was obtained by solvent hydrothermal combining ethanol heat treatment technique. The Raman, FTIR, TEM, ESR, EIS and PL results demonstrate that the formation of defects on the {0 0 1} facet of BMO can effectively promote charge separation and prolong the life of optical carriers. The photocatalytic performance is evaluated by monitoring different concentrations RhB removal from aqueous solution and the results showed that defective Bi 2 MoO 6 nanobelts displayed 39 times and 60 times degradation rate than that of comparative conventional Bi 2 MoO 6 nanosheets and P25, respectively. In combination of controllable preparation process, excellent adsorption capacity and highly enhanced photocatalytic performance, this newly defective Bi 2 MoO 6 nanobelt might be a promising candidate for degradation of organic dyes in wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2015
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IF 7.435
Peng Wang,Xiao Li,Jialin Fang,Danzhen Li,Jing Chen,Xiaoyun Zhang,Yu Shao,Yunhui He
Anatase TiO 2 with exposed {0 0 1} facets (denoted as T001) is becoming one of the hotspots in photocatalytic field due to the highly reactive {0 0 1} facets. Nowadays, to further extend the applications of T001 in visible region, researchers are struggling to develop T001-based visible-light-responsive photocatalysts. In this paper, for the first time, CdSe quantum dots (QDs)-decorated T001 (denoted as CS-T001) was synthesized successfully via a facile method and demonstrated as a highly efficient and stable photocatalyst for reduction of nitro aromatics under visible light irradiation. Besides the obviously extended light absorption in visible region, the decoration of CdSe QDs onto T001 would remarkably improve the transfer and separation efficiency of photogenerated charge carriers, resulting in the much higher activity of CS-T001 as compared with pure T001 and CdSe QDs. Serving as the accepted sites for photoelectrons generated from CdSe QDs, the substrate T001 also plays a vital role. First, T001 offers highly active reaction sites due to the much higher surface energy of {0 0 1} facet than that of {1 0 1} facet. Second, compared with CdSe QDs-decorated anatase TiO 2 with exposed {1 0 1} facets (denoted as CS-T101), CS-T001 can generate electrons with stronger reducibility to participate in the photocatalytic reduction process. Third, the aggregation of T001 nanosheets gives rise to the porous structures with slit-like pores, providing efficient transport pathways to reactant and product molecules. Fourth, CS-T001 possesses much higher separation efficiency of photogenerated charge carriers as compared to CS-T101. We believe that our work could not only provide a facile method for fabricating novel QDs-decorated T001 photocatalysts but also help us to realize the synergy between decoration of QDs and exposure of TiO 2 {0 0 1} facets during the photocatalytic reaction process.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Dan Zhao,Xianfa Zhang,Wenjing Wang,Lili Sui,Xiaojing Bai,Haixiang Song,Chuanyu Guo,Yingming Xu,Xiaoli Cheng,Shan Gao,Lihua Huo
Early and painless detection of type-I diabetic patients by detecting acetone concentration in their exhaled breath would be a rapid and effective means. TiO 2 materials with exposed active (0 0 1) facet were synthesized mostly with HF as raw material, and the particle size was relatively large. In this work, (0 0 1) and (1 0 1) facets co-doped TiO 2 nanocubes with particle size < 50 nm were successfully prepared by a simple one-step hydrothermal process assisted by the ionic liquid ([Bmim][BF 4 ]) as the fluorine source and morphology modifier. Due to the exposure of the active (0 0 1) facets, the sensor exhibited good gas response to acetone gas at a low operating working temperature (OWT) of 170 °C with a detection limit as low as 30 ppb and a response time of only 2.2 s for 100 ppm acetone gas, and also relatively excellent selectivity, reproducibility, moisture resistance and long-term stability. It is worthy to point that, the changes of acetone concentration were compared in exhaled gas from healthy people and type-I diabetic patients, and the responses to exhaled gas of type-I diabetic patients were also tracked at different time in the same day. This provides significant convenience for early and painless diagnosis of type-I diabetic patients.
研究领域:
材料科学
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医学
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传感器技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2015
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IF 2.711
Yingjun Li,Qin Wang,Baocang Liu,Jun Zhang
BiOCl nanosheets with tunable lamella thickness and dominantly exposed {0 0 1} facets were selectively synthesized via a facile hydrothermal method. By modifying the synthetic parameters, such as the amount of P123 and mannitol, the reaction time, types of surfactants, the size, thickness, morphologies, and percentage of {0 0 1} facets over BiOCl nanosheets were well controlled. The exposed {0 0 1} facets with high surface energy and high density of oxygen atoms are not only conducive to the adsorption of the rhodamine B (RhB) dye but also can accumulate the photo-generated electrons, which can be captured by O 2 and converted into reactive oxygen species O 2 − . Therefore, the resultant ultrathin BiOCl nanosheets with exposed {0 0 1} facets exhibit superior catalytic activity for dye photosensitization degradation under visible light irradiation. Impressively, the ultrathin BiOCl nanosheets prepared with P123 and mannitol manifest superior catalytic activity and RhB was completely degraded within 20 min. Our current work is expected to offer a new insight into photocatalytic theory for better understanding of visible light photocatalytic reactions and rational design of highly active photocatalysts.
研究领域:
材料科学
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环境科学
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光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2014
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IF 3.552
Jian-Wen Shi,Hui-Ying Ai,Jian-Wei Chen,Hao-Jie Cui,Ming-Lai Fu
Composite photocatalysts composed of nitrogen-doped anatase TiO 2 plates with exposed {0 0 1} facets (NTS) and graphene nanosheets (G) were firstly synthesized by a facile one-pot hydrothermal process. The morphologies, structural properties, and photocatalytic activities of the resultant NTS/G composites were investigated in detail. Graphene nanosheets were demonstrated play three important roles in the NTS/G composites, as transporter of photo-excited electrons, extender of light absorption range and enhancer of adsorptive capacity, respectively. Due to the effective charge anti-recombination, the efficient utilization of the visible light and the high adsorptive capacity to target pollutants, the composites exhibited significant improvement in photocatalytic degradation of methylene blue under visible light irradiation. Based on the results, the mechanism of enhanced visible-light photocatalytic activity on NTS/G composites was proposed.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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