JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Wei-Long Xu,Jingli Hu,Qiyan Yang,Yuebin Lian,Min Zheng,Erwei Du
Perovskite materials have shown great application prospects in the field of photocatalysis due to their excellent photoelectric properties . However, the toxicity of lead and material instability limit its application. In this work, the heterojunction based on C 3 N 4 thin layer encapsulated lead-free Cs 3 Bi 2 Br 9 nanocrystals was constructed by electrostatic self-assembly method. This combination way does not disrupt the electronic, crystalline and structural properties of C 3 N 4 and Cs 3 Bi 2 Br 9 . Fluorescence quenching in C 3 N 4 /Cs 3 Bi 2 Br 9 composite is ascribed to the charge transfer process, which could be directly observed by spatially and temporally resolved fluorescence mapping image. The synergistic effect between C 3 N 4 and Cs 3 Bi 2 Br 9 can significantly improve the photocatalytic degradation efficiency of RhB , 98 % at 1 h. The stability of the composite was enhanced due to the special encapsulation effect. This work will provide a guideline for the construction of two-dimensional materials and perovskite heterojunction systems in the field of photocatalysis .
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 19
·56188-56197
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IF 5.8
Chen Jingwen,Wu Menglin,Ni Jiupai,Ni Chengsheng
Photocatalysis using the visible light of the sun is an environmentally friendly method of eliminating the NOx pollutant from the ambient air. Although Cs 3 Bi 2 Br 9 , a semiconductor with a band gap of 2.54 eV, may be a strong absorber of visible light, its photocatalysis towards the abatement of NOx is unknown. In this study, Cs 3 Bi 2-x Pb x Br 9-x (0 ≤ x ≤ 0.0789) are used for the photocatalytic oxidation of NOx. A significant NO oxidation efficiency (80%) is observed over Cs 3 Bi 2-x Pb x Br 9-x (x = 0.0443) under visible light, which is attributable to the Br vacancy ( V Br ) brought about by Pb 2+ doping. The presence of V Br increased the ionic selectivity of in the oxidized NO. At higher Pb doping level, two HONOs adsorbed on the V Br , linked, and then reduced by hot electrons to produce N 2 O 2 2− . The di-azo coupling could passivate the activation of NO on the V Br . This work advances the defect engineering of halide for the photo-driving solid–gas reaction in air.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Jinghang Chen,Yaqiang Wu,Zihao Cui,Qianqian Zhang,Zeyan Wang,Zhaoke Zheng,Hefeng Cheng,Yuanyuan Liu,Xin Li,Shukui Shi,Baibiao Huang,Peng Wang
The carbonyl compounds synthesized from benzyl alcohol by selective photocatalysis have a wide range of applications in the chemical, pharmaceutical and food industries, while the fine chemical synthesis remains challenged by inefficient carrier separation and inadequate redox potential control in conventional semiconductor systems. The stability and eco-friendly attribute of lead-free bismuth halide perovskites emerge as promising photocatalysts for practical applications. Herein, we design and synthesize a Z-scheme heterojunction between Cs 3 Bi 2 Br 9 and Bi 2 WO 6 by an anti-solvent method. The optimized Cs 3 Bi 2 Br 9 /Bi 2 WO 6 composite demonstrates enhanced photocatalytic performance for benzyl alcohol oxidation, achieving 95 % conversion efficiency with 99 % benzaldehyde selectivity under AM 1.5G irradiation. Systematic in situ characterizations, including electron spin resonance, X-ray photoelectron spectroscopy and diffuse reflectance infrared Fourier-transform spectroscopy, evidence the Z-scheme charge transfer mechanism in Cs 3 Bi 2 Br 9 /Bi 2 WO 6 , track key intermediates during the oxidation pathway, and mechanistically identify superoxide radicals (• O 2 - ) as the predominant active species. This study not only advances the understanding of photocatalytic mechanisms in Z-scheme organic transformations but also provides a foundational framework for the design of efficient photocatalytic systems.
研究领域:
材料科学
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化学工程
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环境科学
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高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Rui Zhang,Zeng Chen,Xiaohui Li,Jintao Xu,Jing Hui,Putao Zhang,Meiyue Liu,Jianyao Tang,Zhengyu Ren,Shengjun Li
In light of the immense potential solid-state photo-rechargeable batteries hold in the efficient utilization of renewable solar energy, there is a rapidly growing demand for materials that possess both energy harvesting and storage capabilities. In this study, a solid-state photo-rechargeable battery has been designed based on the FTO(Fluorine-doped SnO 2 transparent conductive glass)/TiO 2 /Cs 3 Bi 2 Br 9 /Pt/FTO system, which achieves dual functions of photoelectric conversion and energy storage. The inorganic bismuth-based material employed in these batteries exhibits commendable cyclic stability. Under photo-rechargeable conditions, a single cell can maintain an open-circuit voltage as high as 0.45 V in the absence of illumination. By connecting multiple cells in series, we succeed in powering an LED (Light-emitting diode) continuously for 1 min without light exposure. The findings of this research open new avenues for the design and development of novel materials that could enable highly efficient solid-state photo-rechargeable batteries.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
Kun Xu,Rui Xu,Xuejing Liu,Qin Wei
A handily self-powered photoelectrochemical (PEC) sensor is established for acetamiprid (ACE) analysis supported by Cu 3 Mo 2 O 9 /Ag 2 S photoanode and Cs 3 Bi 2 Br 9 /BiOBr photocathode. The band gap structure of Cu 3 Mo 2 O 9 and Ag 2 S is matched which enhanced the electron transfer rate. Photocathode composite is synthesized at the interface of water and oil, and the resulting composite has good stability to water and light. Electrons flowing from the photoanode through the external circuit to the photocathode can combine with photogenerated holes of Cs 3 Bi 2 Br 9 /BiOBr, causing the photoelectrons pass into the solution and react with oxygen, and producing a large photocathode current. With the increase of ACE concentration, the detected photocurrent gradually decreased due to the steric hindrance, and a linear relationship between photocurrent and ACE concentration in the range of 0.001–500 nM. This excellent PEC sensor also performed the great detection stability, selectivity and reproducibility, which can also be applied in practical application for pesticides analysis.
研究领域:
分析化学
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环境科学
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食品科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Bingke Xie,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
Nitrogen oxide (NOx) removal has long been a subject that has motivated researchers to develop a diverse range of techniques, including physical adsorption, biofiltration, low temperature plasma, selective catalytic reduction, and photocatalytic oxidation. In this work, Cs 3 Bi 2 Br 9 lead-free perovskite was synthesized via in-situ growth on a 3D flower-like g-C 3 N 4 microsphere, which uses a series of Cs 3 Bi 2 Br 9 /g-C 3 N 4 (labeled as X% CBB/CN, where X = 5, 10, 20, 30, and 50) heterojunctions for the photocatalytic removal of NOx. The efficiency of NO removal was enhanced considerably, compared with that of the pristine elements, when irradiated with a 300 W Xe lamp with the concentration of NO at the ppb level. The results of photocurrent measurements and electrochemical impedance spectroscopy are consistent with the results of the NO removal test. Electron spin resonance results verified that ⋅OH and ⋅O 2 − are formed under visible light irradiation. We report the detailed mechanism for the photocatalytic process of NO removal by CBB/CN heterojunctions and provide insights into the potential applications of lead-free perovskite-based heterostructures in the field of photocatalysis.
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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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yang Ding,Chunhua Wang,Sateesh Bandaru,Lang Pei,Runtian Zheng,Yun Hau Ng,Daniel Arenas Esteban,Sara Bals,Jiasong Zhong,Johan Hofkens,Gustaaf Van Tendeloo,Maarten B.J. Roeffaers,Li-Hua Chen,Bao-Lian Su
Solar-light driven oxidation of benzylic alcohols over photocatalysts endows significant prospects in value-added organics evolution owing to its facile, inexpensive and sustainable process. However, the unsatisfactory performance of actual photocatalysts due to the inefficient charge separation, low photoredox potential and sluggish surface reaction impedes the practical application of this process. Herein, we developed an innovative Z-Scheme Cs 3 BiBr 9 nanoparticles@porous C 3 N 4 tubes (CBB-NP@P-tube-CN) heterojunction photocatalyst for highly selective benzyl alcohol oxidation. Such composite combining increased photo-oxidation potential, Z-Scheme charge migration route as well as the structural advantages of porous tubular C 3 N 4 ensures the accelerated mass and ions diffusion kinetics , the fast photoinduced carriers dissociation and sufficient photoredox potentials. The CBB-NP@P-tube-CN photocatalyst demonstrates an exceptional performance for selective photo-oxidation of benzylic alcohol into benzaldehyde with 19, 14 and 3 times higher benzylic alcohols conversion rate than those of C 3 N 4 nanotubes , Cs 3 Bi 2 Br 9 and Cs 3 Bi 2 Br 9 @bulk C 3 N 4 photocatalysts, respectively. This work offers a sustainable photocatalytic system based on lead-free halide perovskite toward large scale solar-light driven value-added chemicals production.
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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PubMed
高影响因子
Journal of Materials Chemistry C
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2025
·Vol. 13
·期 14
·7327-7335
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IF 5.1
Dangge Gao,Xin Bao,Bin Lyu,Zhixin Chen,Ailin Zhang,Jianzhong Ma
The growing demand for anti-counterfeiting technology has drawn attention to the emerging perovskite quantum dots (QDs). However, the poor stability of these materials is the main obstacle in their the application for reliable anti-counterfeiting. In this work, we propose an effective approach for the preparation of highly stable all-inorganic Bi-based QDs using a polyacrylate (PA) coating, achieving a photoluminescence intensity retention of 95% even after 71 h of UV irradiation. Using the leather finishing technology, PA/Cs3Bi2Br9 QDs were used as a smart concealed finishing agent to prepare fluorescent anti-counterfeiting leather. More importantly, the fluorescence effect was efficiently sustained even though the fluorescent anti-counterfeiting leather was crudely treated by water-soaking, UV light treatment, bending and rubbing treatment. This research provides effective strategies to improve the stability of Cs3Bi2Br9 QDs and a new idea for leather anti-counterfeiting applications.
研究领域:
材料科学
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光学工程
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化学工程
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DOI
高影响因子
Catalysis Science & Technology
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2025
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IF 4.2
Hanyu Guo,Wei-Wei Lu,Peng Xu,Jie Luo,Kaisheng Yao,Haoyan Cheng,Hao Hu,Kunpeng Sun
Metal e Metal halide perovskites (MHPs) have stand out as a photocatalyst because of their excellent optical property. However, the main drawbacks of MHPs are their instability resulted from their ionic nature, and the toxicity of Pb in popular lead halide perovskite. To solve these problems, in this work, we choose Cs3Bi2Br9 as a typical lead-free MHPs, and prepared Cs3Bi2Br9 using ionic liquids 1-decyl-3-methylimidazolium bromide ([Dmim]Br) as the surface ligands and bromine source through ligand-assisted reprecipitation method. The prepared Cs3Bi2Br9 NCs remained stable under light, heat and moisture, which is attributed to the anchoring of ionic liquid [Dmim]Br on the nanocrystalline surface to passivates the harmful defects. Then, we select oxidation of benzyl alcohol as a representative model reaction and investigated the photocatalytic performance of Cs3Bi2Br9 NCs. Under the illumination of visible light, benzyl alcohols can be transformed at the presence of Cs3Bi2Br9 NCs into corresponding aldehydes with near 100% selectivity and 99.64% conversion in 1 h. The radical scavenging experiments, spectroscopic analysis, and EPR measurements confirmed that the main active species responsible for highly selective oxidation were singlet oxygen 1O2, which were proved to be generated from the transformation of superoxide radicals •O2−. This work is expected to provide insights for extending the design and photocatalytic applications of lead-free MHPs NCs.
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
高影响因子
Science China-Materials
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2024
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IF 6.8
Liu Hongjie,Sun Xue,Liu Jiaxin,Li Xiang,Hua Yunqiu,Yue Zhongjie,Song Jian,Wang Xilong,Yang Yujie,Lin Qianqian,Zhai Zhongjun,Tao Xutang,Zhang Guodong
Lead-halide perovskite single crystal (SC) heterojunctions have attracted significant attention for X-ray detection owing to their unique combination of high sensitivity, resolution, stability and low detection limit. However, the toxicity of lead in those perovskite heterojunctions limits their practical applications. Herein, we report the construction of the first all-inorganic lead-free Cs 2 AgBiBr 6 /Cs 3 Bi 2 Br 9 SC heterojunctions with an area of 20 × 20 mm 2 via a facile liquid-phase epitaxial method through temperature-lowering crystallization. The epitaxial crystallization of the three-dimensional (3D) Cs 2 AgBiBr 6 SC film on a 2D Cs 3 Bi 2 Br 9 SC substrate requires a large driving force for transitioning from the Volmer–Weber mode to the layer-by-layer growth mode under a rapid cooling rate. The Cs 2 AgBiBr 6 /Cs 3 Bi 2 Br 9 SC heterojunction detector achieves a high sensitivity of 1390 µC Gy air −1 cm −2 for 100 keV hard X-ray detection at room temperature, which is enhanced to 2075 µC Gy air −1 cm −2 at 75°C, demonstrating impressive high-temperature stability. Moreover, the detector achieves a detection limit of 37.48 nGy air s −1 and excellent stability for 90 days without any encapsulation. This work demonstrates the feasibility of using the epitaxial mechanism of perovskite formation on a high-surface-energy substrate for the controllable construction of a 3D/2D heterojunction that significantly enhances X-ray detection performance.
研究领域:
材料科学
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物理学
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电子工程
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Jianghua Xu,Jianping Xu,Shaobo Shi,Weihao Bian,Jing Chen,Songyao Gao,Xue Zhou,Lina Kong,Xiaosong Zhang,Lan Li
Non-toxic, stable Cs 3 Bi 2 Br 9 halide perovskite films prepared using a one-step solution method have become the active layer of resistive switching memory. Here, we control the nucleation and growth of Cs 3 Bi 2 Br 9 perovskite by introducing an appropriate amount of HBr to adjust the supersaturation of the perovskite precursor solution, thus improving the film formation quality and optimizing the device performance. The memory prepared for this film has a significant bipolar resistive behavior with a high switching ratio of 10 5 , a cycle time of 300 and a retention time of 10 4 s. In addition, the current transient response of the device under pulsed voltage is investigated. By different the pulse voltage parameters (pulse amplitude, duration and time interval) to study the variation of the device current value, the term "TJUT" is finally encoded and decoded using different the number of pulses and repetitions.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
Journal of Materials Chemistry C
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2025
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IF 5.1
Jian Liu,Ying Nie,Xiaolong Zhou,Juanjuan Qi,Dongke Li,Jianqiang Luo,Ke Wang
Lead-free Cs3Bi2Br9 perovskite has emerged as a promising candidate for memristor and artificial synapse devices due to its high environmental stability and low toxicity compared to lead-based alternatives. In this work, we successfully prepared a high-quality Cs3Bi2Br9 perovskite film via simple spin-coating method combined with low-pressure assisted treatment. Based on the obtained Cs3Bi2Br9 film, a memristor with the structure of W/Cs3Bi2Br9/ITO was fabricated. The memristor demonstrated excellent resistive switching performance, including analog-switching behavior, high environmental stability (> 11 months), low operating voltages (VFORMING ~ 0.65 V, VSET ~ 0.53 ± 0.08 V, and VRESET ~ −0.83 ± 0.11 V), fast switching speed (< 1 μs), and long switching endurance (> 1100 cycles). Furthermore, the synaptic plasticity such as short-term plasticity, long-term plasticity, and synaptic weight potentiation and depression were successfully simulated by pulse-train measurement. Finally, a Fully Connected Neural Network built with the W/Cs3Bi2Br9/ITO memristor can obtain an accuracy of about 90% in recognizing handwritten digits. The results indicate that the lead-free Cs3Bi2Br9-based memristor has great potential for high-stability, cost-effective, eco-friendly, and low-power consumption nonvolatile memory and neuromorphic computing applications.
研究领域:
材料科学
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神经形态计算
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电子工程
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DOI
高影响因子
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