CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Tingting Ren,Yanqing Zhang,Suning Fu,Yuanming Hou,Jiaxin Wang,Jingyi Qin,Zhengzheng Xie,Jianjun Yang,Zhongjie Guan,Shilong Jiao,Qiuye Li,Xianwei Fu
Exploring well-designed photocatalysts with high-quality interfaces for converting CO 2 into value-added chemical fuels faces a great challenge. Herein, a 2D/0D S-scheme heterojunction of Cs 3 Bi 2 Br 9 nanosheet/BiOBr nanocrystal (CBB/BOB) photocatalysts is designed and synthesized by an in-situ growth strategy for photocatalytic CO 2 reduction. The S-scheme heterojunctions with atomic-level intimate interfaces greatly accelerate the separation and transfer efficiency of photoinduced carriers and improve the reduction ability of photogenerated electrons resulting in prominent photocatalytic activity toward CO 2 photoreduction. Consequently, the environment-friendly hybrids show impressive photocatalytic CO 2 reduction efficiency and high CH 4 selectivity with a CH 4 yield and selectivity of 12.8 μmol g −1 h −1 and 79 %, respectively, which is 43 and 2 times higher than that of pristine CBB, respectively. The detailed experimental characterization and theoretical calculations indicate that the high adsorption/activation capability of CO 2 molecules and CO* intermediates and the lowered free energy of CO 2 reduction promote the photoconversion of CO 2 to CH 4 on the CBB/BOB heterojunctions. This work provides a new strategy for constructing perovskite-based photocatalysts for solar fuel applications.
研究领域:
光催化
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材料科学
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环境化学
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纳米技术
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能量转换
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产品关联
DOI
高影响因子
Small
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2025
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IF 12.1
Sai-Nan Guo,Yan-Jun Dong,Yao-Xin Lv,Ze-Peng Bai,Xin-Ran Shi,Jie-Xin Wang,Jian-Feng Chen
Enhancing the built-in electric field (BIEF) in heterojunctions remains a pivotal challenge for developing efficient photocatalysts. Herein, a high-gravity-assisted approach utilizing rotating packed bed (RPB) is proposed to instantaneously and continuously construct Cs 3 Bi 2 Br 9 /TiO 2 (CBB/TiO 2 ) heterojunctions with intensified BIEF, intimate interfacial contact, and accelerated charge-transfer kinetics, overcoming the constraints of traditional electrostatic self-assembly techniques. Compared to the counterpart of batch-type stirred tank (ST), the optimized heterojunction exhibits a 1.8-fold elevation in surface charge density and a 2.3-fold enhancement in BIEF strength, offering a robust driving force for directional charge-transfer. These advancements result in remarkable carbon dioxide (CO 2 ) photoreduction performance, achieving a high CO production rate of 259 µmol g −1 h −1 , which is 1.5 times higher than that of ST, 3.6 and 6.0 times exceeding both pristine components. Mechanistic investigations indicate that the enhanced activity stems from ameliorated charge carrier separation and transport at the high-quality interface. The generality of this approach is corroborated through successful extension to CBB/ZnO (1.92-fold BIEF enhancement) and CBB/CuO (2.04-fold) systems. This study establishes high-gravity engineering as a potent platform for the fabrication of high-performance photocatalytic heterojunctions.
研究领域:
材料科学
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催化
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化学工程
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纳米技术
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CLUSTER SCIENCE
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2024
·Vol. 36
·期 1
·1-12
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IF 2.7
Liu Jiali,Li Chen,Zhang Shen,Liu Xinni,Wei Xiao,Gao Yue,Wang Fei,Yan Mengwei,Wang Jiaqi,Kamuti Diana
All-inorganic perovskite quantum dots have sparked a research boom due to their excellent optical properties, however, their own strong ionicity and lead toxicity have hindered further development in the field of sensing. In this study, we have solved the toxicity problem of lead-based perovskite quantum dots by replacing lead with green metal bismuth. Meanwhile, due to the ligand-passivation effect of oleylamine and oleic acid, we successfully synthesized highly stable bismuth-based perovskite quantum dots(Cs 3 Bi 2 Br 9 PQDs)in ethanol, and constructed the environment-friendly fluorescence sensor for the quantitative detection of oxytetracycline (OTC) for the first time. The results demonstrated that the fluorescence quenching degree of Cs 3 Bi 2 Br 9 PQDs showed a good linear relationship with the concentration of OTC within the range of 2.0 ~ 18 µM, and the detection limit was 0.432 µM. By studying fluorescence lifetime, absorption spectroscopy, and evaluation of internal filtration parameters, it was proved that the sensing mechanism was caused by the inner filter effect owing to the overlapping of fluorescence emission spectrum of Cs 3 Bi 2 Br 9 PQDs and UV absorption spectrum of OTC. Moreover, Cs 3 Bi 2 Br 9 PQDs fluorescent sensor had good selectivity and anti-interference ability. It is believed that this work will open up a new way for lead-free perovskite quantum dots fluorescence sensor in the field of analytical detection.
研究领域:
分析化学
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环境科学
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生物医学
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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
Xing-Yao Zhao,Xiao-Song Zhang,Xin Liu,Xiao-Kai Gong,Xiu-Rong Yuan,Bao-zeng Zhou,Jian-Ping Xu,Li-Na Kong,Lan Li
Lead-based perovskite quantum dots (QDs) have promising applications in optoelectronic devices , but commercial applications are limited by the potential toxicity and poor stability of lead. Meanwhile, there are lattice, polarity, and thermal expansion coefficient mismatches in integrating semiconductor materials onto the surface of photoelectronic circuit devices, resulting in high-density defects limiting the reliability of photoelectronic devices. Therefore, there is a need to investigate perovskite alternatives that are non-toxic, stable, and can be effectively coupled to silicon photonic circuits. In this paper, lead-free perovskite Cs 3 Bi 2 Br 9 /SiO 2 QDs were synthesized. The emission wavelength falls within the 400–560 nm range, exhibiting vibrant blue photoluminescence and demonstrating exceptional air stability for a duration exceeding 60 days. Optical tests and density-functional theory (DFT) calculations show that the silica shell layer effectively binds the electron and hole wave functions, prevents photon-generated carriers from escaping, reduces surface defects , and improves the carrier recombination probability. Meanwhile, using Cs 3 Bi 2 Br 9 /SiO 2 QDs as a luminescent down-shifting (LDS) layer in combination with a conventional silicon solar cell , the photovoltaic conversion power was increased by 1.82%. Hence, the core-shell structure is designed by the green environmental protection method to control the improvement of the PL characteristics of QDs , which opens a window for the synthesis of new barrier materials in ethanol and water systems, making the Cs 3 Bi 2 Br 9 /SiO 2 QDs have great potential for the application of novel optoelectronic devices in the future.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2024
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IF 10.7
Dong Ding,Bo Zhou,Xiaoteng Li,Jiaqi Duan,Kaiyan Wu,Bin Hou,Honglei Fan,Hongliang Liu,Lei Jiang
Two-dimensional inorganic lead-free metal halide perovskite (MHP) single crystals possess superior photoelectric properties and robust stability and are promising as functional materials with optimized performance. However, controlling the growth habit of MHPs to mass-produce two-dimensional crystals without relying on ligands or spatial constraints has yet to be achieved because of their strong three-dimensional bonding characteristics. Here, we propose a crystallization kinetic regulation strategy for mass production of thin Cs3Bi2Br9 platelet single crystals using an anti-solvent-mediated cooling crystallization (AM-CC) approach. Using Cs3Bi2Br9 as morphology-preserving growth templates, we further synthesized isostructural thin Cs2AgBiBr6 platelet single crystals by introducing Ag+ during AM-CC. The quantity of Ag+ in the system emerged as a critical determinant of Cs2AgBiBr6 platelet thickness. The Cs2AgBiBr6 platelets exhibited exceptional optical and photo-response properties, surpassing those of polyhedron-shaped Cs2AgBiBr6. The versatility of our synthesis approach will enable development of high-quality, low-dimensional MHPs with enhanced properties for a diverse range of future applications.
研究领域:
材料科学
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化学
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光子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Juan Gao,Qin Gao,Jiangshun Huang,Xueli Geng,Pengzhan Li,Yihang Liu,Qiaofeng Yang,Hao Zhang,Mei Wang,Zhisong Xiao,Paul K. Chu,Ruifeng Lu,Anping Huang
Low-power and color-sensitive neuromorphic vision systems are critical to the next generation of intelligent devices. Here, we report a coral-inspired, lead-free synaptic device based on Cs3Bi2Br9 perovskite nanocrystals prepared by centrifugal casting into a porous thin film. The device exhibits wavelength-dependent plasticity under 405, 520, and 635 nm illumination without an external bias. By modulating the light wavelength and intensity, short-term and long-term synaptic plasticity are achieved to mimic excitatory, inhibitory, and saturating biological responses. Structural and spectroscopic analyses reveal that bromine vacancies play a key role in the dynamic modulation of carrier transport and plasticity evolution. The efficient preprocessing of RGB visual information significantly enhances recognition accuracy in artificial neural network devices. This wavelength-specific modulation of synaptic plasticity, a novel approach for color image preprocessing and recognition, is very promising for the advancement of neuromorphic systems.
研究领域:
神经形态工程
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光电子学
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材料科学
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人工智能硬件
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光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）