JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Xiaoya Gao,Qian Guo,Guangbei Tang,Wenjie Zhu,Xingxin Yang,Yongming Luo
Ultrathin nanosheets show great promise in photocatalytic technology, due to short path for electron transfer and large surface for reactant adsorption. However, there is no report that ultrathin nanosheets photocatalyst has been used to degrade carbamazepine (CBZ) in aquatic environment. This paper aimed at fabricating ultrathin BiOCl nanosheets to improve the photocatalytic degradation efficiency of CBZ. Herein, tetrabutylammonium hydroxide (TBAOH) was firstly applied to synthesize ultrathin BiOCl nanosheets (BiOCl-T) by a simple hydrolysis route in water at ambient conditions. TBAOH could act as a structure-directing agent, determining the structure and property of BiOCl-T. Assisted by TBAOH, BiOCl-T exhibited ultrathin nanosheets structure with preferential exposed (1 1 0) face. PL, photocurrent density, and EIS Nyquist plots demonstrated the enhanced charge separation efficiency in BiOCl-T. Furthermore, BiOCl-T displayed large pore size and specific surface area. Thus, BiOCl-T showed high photocatalytic activity toward CBZ degradation under simulated sunlight. Upon 30 min irradiation, the degradation efficiency of CBZ was 91.1% with fast degradation kinetics, which is 2.46 times higher than ordinary BiOCl. Active species of h + , O 2 − , and OH contributed to CBZ degradation reaction. The obtained result provides a novel viewpoint to fabricate ultrathin nanosheets and broadening their application in the degradation of recalcitrant pharmaceuticals.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Jia Li,Jianfeng Zheng,Xingmin Liu,Yatao Yang,Xiaojin Han,Zhanggen Huang
Photoelectrochemical reduction of CO 2 with H 2 O into syngas (H 2 /CO) is considered as an important platform to organic chemicals, which can effectively alleviate the greenhouse effect and energy dependence. We synthesized SnO/g-C 3 N 4 p-n junction catalyst with matched energy band, which shows enhanced light absorption performance and photogenerated charge separation efficiency. The M − S plots verified the successful construction of p-n type heterojunctions , and the investigations of LSV , EIS , PL and transient photocurrents test indicate that the recombination rate of charge is well inhibited by the design of p-n heterojunction. In this work, the syngas derived from PEC reduction of CO 2 and H 2 O is achieved by the SnO/g-C 3 N 4 photocathode with a total FE of 70% at an external bias of −1.5 V. In addition, the H 2 /CO molar ratio can be tuned from 1.5 to 10 by controlling the applied voltage. The study may inspire a new thought for the design of high-performance photoelectric catalyst and a promising strategy for PEC CO 2 reduction to valuable carbon-based compounds.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Siying Du,Liuyun Chen,Chengzheng Men,Hongbing Ji,Tongming Su,Zuzeng Qin
Photocatalytic H 2 production using solar energy has received great attention, but suffers from low photocatalytic efficiency. Herein, Zn (1−x) Cd x S solid solution with different Zn/Cd molar ratio was synthesized by a solvothermal method, and tested for photocatalytic H 2 production from water. The bandgap, charge carrier separation efficiency and surface defect states of the Zn (1−x) Cd x S can be adjusted by altering the Zn/Cd molar ratio. The separation efficiency of photogenerated electrons and holes was greatly enhanced with the Zn/Cd molar ratio of 0.8:0.2. Moreover, the Zn 0.8 Cd 0.2 S exposed most surface defect states compared to those of other Zn (1−x) Cd x S, which can be act as electron pools and active sites for improving photocatalytic H 2 production. Therefore, when the molar ratio of Zn/Cd is 0.8:0.2, the Zn 0.8 Cd 0.2 S exhibited the best performance for photocatalytic H 2 production with the H 2 production rate of 7.71 mmol·g -1 ·h -1 , which is much higher than that of ZnS (17 μmol·g -1 ·h -1 ) and CdS (5.37 μmol·g -1 ·h -1 ). This work provides an in-depth understanding of the surface defect states for enhancing the photocatalytic H 2 production.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
VACUUM
·
2025
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IF 3.9
Jingwen Meng,Xiaoli Jin,Mengyuan Zhao,Zhuohua Chen,Weixi Hao,Shilong Lin,Xin Li,Fengyun Su,Fei Li,Kaiting Yang,Xiongtao Lv,Xuhan Zhang,Haiquan Xie
Limited light absorption and low carrier separation efficiency remain major obstacles to converting CO 2 into solar fuel. Rational design of semiconductor photocatalysts with unique structures holds promise for overcoming these challenges. In this study, Bi 4 O 5 Br 2 photocatalyst with a hollow core-shell architecture is synthesized via a one-step solvothermal method. This innovative structure facilitates efficient reflection and absorption of incident light within its internal cavity, while also minimizing the charge transfer path. Consequently, it significantly improves both light harvesting capabilities and charge carrier separation efficiency. Compared to the solid Bi 4 O 5 Br 2 (CO, 0.21 μmol g −1 h −1 ; CH 4 , 0.78 μmol g −1 h −1 ) and hollow Bi 4 O 5 Br 2 (CO, 0.25 μmol g −1 h −1 ; CH 4 , 0.99 μmol g −1 h −1 ) counterparts, the hollow core-shell Bi 4 O 5 Br 2 exhibits superior CO 2 photoreduction performance, achieving production rates of 3.61 and 2.40 μmol g −1 h −1 for CO and CH 4 , respectively. Notably, it also enhances C 2 H 4 production during the CO 2 reduction process, with a yield of 0.17 μmol g −1 h −1 , whereas no detectable C 2 H 4 is produced by either the solid or hollow Bi 4 O 5 Br 2 structures. This research provides fresh insights into the structural design of advanced photocatalysts and holds significant implications for converting CO 2 into high-value chemicals.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
INORGANIC CHEMISTRY
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2024
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IF 4.3
Chunmei Li,Nan Su,Huan Du,Bo Hu,Jilong Wang,Xingting Zhao,Huiling Lu,Hongjun Dong
It is an arduous issue to significantly improve the charge separation efficiency of polymer photocatalysts due to their inherently high exciton binding energy. Herein, based on an interfacial coupling and atom diffusion strategy, a metal-free 3D/2D van der Waals (VdW) heterojunction is fabricated through the modification of rich-vacancy wrinkle-like S8 (Vs-S8) microspheres on the surface of S-doped polymeric carbon nitride (S-PCN) nanosheets. The insight into the mechanism reveals that the interfacial coupling effect induces a strong built-in electric field from S-PCN to Vs-S8, and the carrier transfer behavior abides by the type-II charge transfer pathway, thereby dramatically improving the separation efficiency and transport kinetics of photogenerated carriers. As a result, the as-prepared metal-free 3D/2D Vs-S8/S-PCN VdW heterojunction is endowed with more superior photocatalytic hydrogen evolution (PHE) performance than PCN. The highest average PHE rate is about 11.3 times higher than that of PCN, and the apparent quantum efficiency reaches 30.1% at 400 nm on the optimal 3%-Vs-S8/S-PCN sample. This work contributes a new design strategy for a metal-free VdW heterojunction and provides a feasible avenue for improving the carrier separation efficiency of polymer photocatalysts.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
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2020
·Vol. 35
·期 16
·2148-2157
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IF 2.502
Qianhong Shen,Chengyan Wu,Zengyu You,Feilong Huang,Jiansong Sheng,Fang Zhang,Di Cheng,Hui Yang
A novel g-C3N4 nanoparticle@porous g-C3N4 (CNNP@PCN) composite has been successfully fabricated by loading g-C3N4 nanoparticles on the porous g-C3N4 matrix via a simply electrostatic self-assembly method. The composition, morphological structure, optical property, and photocatalytic performance of the composite were evaluated by various measurements, including XRD, SEM, TEM, Zeta potential, DRS, PL, FTIR, and XPS. The results prove that the nanolization of g-C3N4 leads to an apparent blueshift of the absorption edge, and the energy band gap is increased from 2.84 eV of porous g-C3N4 to 3.40 eV of g-C3N4 nanoparticle (Fig. 6). Moreover, the valence band position of the g-C3N4 nanoparticle is about 0.7 eV lower than that of porous g-C3N4. Therefore, the photo-generated holes and electrons in porous g-C3N4 can transfer to the conduction band of g-C3N4 nanoparticle, thereby obtaining higher separation efficiency of photo-generated carriers as well as longer carrier lifetime. Under visible-light irradiation, 6CNNP@PCN exhibits the highest photocatalytic performance (Fig. 8) on MB, which is approximately 3.4 times as that of bulk g-C3N4.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Guojuan Hai,Jianfeng Huang,Yanni Jie,Liyun Cao,Long Wang,Changle Fu,Ting Xiao,Mengfan Niu,Liangliang Feng
Crystal facets-orientation growth plays a crucial role in determining photocatalytic performance. Herein, a series of (010) facets-oriented W 18 O 49 nanowires were controllably synthesized by a facile solvothermal alcoholysis method using octadecylamine as the crystal growth capping agent in order to regulate the specific growth behavior and unveil its correlation with photocatalytic performance. The properties of the prepared W 18 O 49 nanowires, such as surface oxygen vacancies , light absorption and the band gap size, as well as the surface charge carriers separation rate, could be well-modulated via tailoring the preferred orientation growth. The W 18 O 49 nanowire with the strongest (010)-faceted orientation demonstrated the best photocatalytic degradation of Methyl Orange under ultraviolet light irradiation (up to 100% within 15 min) and visible light irradiation (up to 91% within 95 min). These interesting findings not only help us to gain an in-depth understanding of the relationship between the preferred orientation growth and the photocatalytic performance but also have the potential to open up an innovative route/protocols for the preparation of crystal facets-oriented metal oxides for highly efficient photocatalysis .
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2019
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IF 2.291
Ruoqian Zhang,Yuanyuan Liu,Jiajia Wang,Zeyan Wang,Peng Wang,Zhaoke Zheng,Xiaoyan Qin,Xiaoyang Zhang,Ying Dai,Baibiao Huang
A triazine-based MOFs [PCN-9(Co)] was synthesized and its photoelectrical, photophysical properties were studied. As a new photocatalyst , PCN-9(Co) displays photocatalytic hydrogen evolution from water under UV–Visible light irradiation . With the introduction of platinum complex, PCN-9-Pt was obtained and platinum complex was believed to coordinate with the N in triazine . The H 2 evolution rate of PCN-9-Pt is greatly improved, about 6.8 times higher than that of PCN-9(Co). The reason is due to the fact that platinum complex plays an important role in improving the separation efficiency of photogenerated charge carriers, as verified by PL and EIS results. This result provides a new kind of idea of modifying MOFs materials with molecular complex to improve the photocatalytic activity .
研究领域:
材料科学
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光化学
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DOI
高影响因子
Solar RRL
·
2019
·Vol. 4
·期 1
·1900365
·
IF 0
Zi-Cheng Kong,Hong-Hong Zhang,Jin-Feng Liao,Yu-Jie Dong,Yong Jiang,Hong-Yan Chen,Dai-Bin Kuang
The excellent photoelectrical properties have rendered lead halide perovskites potential candidates for photocatalytic CO 2 reduction, but they still suffer from the low charge separation efficiency and slow catalytic reaction dynamics. To tackle these drawbacks, herein, a novel CsPbBr 3 -Re(CO) 3 Br(dcbpy) (dcbpy=4,4’-dicarboxy-2,2’-bipyridine) composite photocatalyst is elaborately designed and fabricated by anchoring the complex molecules onto the surface of CsPbBr 3 nanocrystal to work as co-catalyst. Owing to the robust interfacial interaction, effective electron extraction from CsPbBr 3 to complex molecules can be established, which enables the mutual synergetic action to get boosted visible-light-driven catalytic activity and product selectivity. As an encouraging result, a high electron consumption rate of 73.34 μmol g −1 h −1 is yielded for the optimized CsPbBr 3 -Re(600) sample, which is about 23-fold of that of pristine CsPbBr 3 . In addition, a praiseworthy CO selectivity of up to 95% is obtained. The composite catalyst also exhibits good catalytic stability, and a CO yield of 509.14 μmol g −1 is achieved after 15 h of continuous illumination. This result may provide a new strategy to design efficient lead halide perovskite-based heterogeneous photocatalysts.
研究领域:
材料科学
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环境科学
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化学
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DOI
ChemSusChem
·
2017
·Vol. 10
·期 13
·2796-2804
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IF 7.226
Dong-Dong Qin,Cai-Hua He,Yang Li,Antonio C. Trammel,Jing Gu,Jing Chen,Yong Yan,Duo-Liang Shan,Qiu-Hong Wang,Jing-Jing Quan,Chun-Lan Tao,Xiao-Quan Lu
Graphical A passive catalyst? A Fe 2 O 3 shell was grown onto a ZnO core to protect the surface from corrosion and increase the charge-separation efficiency. PH 3 treatment onto the core–shell nanowire creates a Fe 2 PO 5 with dual functionality: a catalyst and passivating overlayer. Zinc oxide is regarded as a promising candidate for application in photoelectrochemical water oxidation due to its higher electron mobility. However, its instability under alkaline conditions limits its application in a practical setting. Herein, we demonstrate an easily achieved wet-chemical route to chemically stabilize ZnO nanowires (NWs) by protecting them with a thin layer Fe 2 O 3 shell. This shell, in which the thickness can be tuned by varying reaction times, forms an intact interface with ZnO NWs, thus protecting ZnO from corrosion in a basic solution. The reverse energetic heterojunction nanowires are subsequently activated by introducing an amorphous iron phosphate, which substantially suppressed surface recombination as a passivation layer and improved photoelectrochemical performance as a potential catalyst. Compared with pure ZnO NWs (0.4 mA cm −2 ), a maximal photocurrent of 1.0 mA cm −2 is achieved with ZnO/Fe 2 O 3 core–shell NWs and 2.3 mA cm −2 was achieved for the PH 3 -treated NWs at 1.23 V versus RHE. The PH 3 low-temperature treatment creates a dual function, passivation and catalyst layer (Fe 2 PO 5 ), examined by X-ray photoelectron spectroscopy, TEM, photoelectrochemical characterization, and impedance measurements. Such a nano-composition design offers great promise to improve the overall performance of the photoanode material.
研究领域:
材料科学
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化学工程
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能源科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qun Ding,Xuejun Zou,Jun Ke,Yuying Dong,Yubo Cui,Hongchao Ma
Herein, a ternary TiO 2 /MIL-88A(Fe)/g-C 3 N 4 heterojunction is successfully constructed through a facile hydrothermal strategy for enhancing solar energy harvesting and efficiency of catalytic nitrogen reduction induced by enlarged light absorption range, increasing interfacial charge transfer ability and desirable stability. Under the simulated sunlight irradiation, the N 2 fixation experiment shows that the yield of NH 3 reaches 1084.31 μmol/(g·h) over the TiO 2 /MIL-88A(Fe)/g-C 3 N 4 photocatalyst, and the yield is significantly enhanced, which is 33.68 and 13.94 times that is higher than the pure TiO 2 and g-C 3 N 4 , respectively. In a mean time, the excellent performance of the photocatalytic N 2 fixation over the ternary TiO 2 /MIL-88A(Fe)/g-C 3 N 4 is verified based on density function theory calculation and the decisive step over the composite is investigated by calculating Gibbs free energies of nitrogen reduction paths. The performance enhancement mechanism of TiO 2 /MIL-88A(Fe)/g-C 3 N 4 is speculated, which indicates that the hybridized three-component system presents a desirable Z-scheme band alignment, resulting in the improvement of separation and transfer efficiency of photoinduced charge carriers. The article shows a new and high-efficiency TiO 2 /MIL-88A(Fe)/g-C 3 N 4 photocatalysis for excellent nitrogen reduction ability.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 42
·22561-22570
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IF 14.511
Kai Song,Huilin Hou,Chuangchuang Gong,Fengmei Gao,Dongdong Zhang,Fang Zhi,Weiyou Yang,Fang He
Photoinduced charge separation and transfer has been recognized as one of the core factors affecting the photoelectrochemical (PEC) performance of BiVO4 based photoanodes. To achieve a higher charge separation efficiency, modulating the surface band edge of BiVO4-based photoanodes could be regarded as the best choice but still a challenge. Herein, first, it was confirmed by density functional theory (DFT) calculations that pristine BiVO4 could form a type-II heterojunction with BiVO4–VBi (replacing Bi sites with V in BiVO4), which could be used to enhance carrier separation. Then we use a gas-phase cation exchange (CA) method to in situ modulate the surface band edge of the BiVO4 photoanode by partially replacing Bi on the surface with V to form a V-rich surface. The charge separation efficiency of the optimized V-rich BiVO4 (V/BVO) photoanode is significantly enhanced from 56.5% to 81.5% compared to pristine BiVO4. As expected, it also displays a higher photocurrent density of 2.87 mA cm−2 at 1.23 V vs. RHE (under AM 1.5G illumination), which is nearly 3.2 times higher compared with pristine BiVO4. Upon further loading the FeOOH cocatalyst, the photocurrent of the V/BVO/FeOOH photoanode reached 4.26 mA cm−2 due to the boosted surface water oxidation properties. This work sheds light on a simple strategy to regulate surface band edges for designing highly efficient photoanodes.
研究领域:
材料科学
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能源科学
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光电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）