Catalysts
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2025
·Vol. 15
·期 2
·157
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IF 4
Shun Li,Xinbo Liu,Xinyue Zhang,Yong Liu
Piezocatalysis is a promising technology for converting mechanical energy to chemical energy. Two-dimensional (2D) piezoelectric materials, with their large surface area, high charge mobility, and good flexibility, are among the most promising candidates in piezocatalysis. In this work, for the first time, we report Bi2O2Se nanosheets (NSs) with an average thickness of ~8 nm and a lateral size of ~160 nm for efficient piezocatalytic H2O2production from water and oxygen under mechanical force induced by ultrasonication. The Bi2O2Se NSs achieved a high H2O2production rate of 1033.8 μmol/g/h using ethanol as the sacrificial agent, significantly surpassing that of its bulk-sheet counterpart. Our results provide a novel potential 2D piezocatalytic material and offer valuable guidance for the design and development of high-efficiency H2O2production driven by mechanical energy from water.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Zhuang Fu,Jia-Ling Jiang,Song-Tao Dong,Miao-Cheng Yu,Lijun Zhao,Lei Wang,Shu-Hua Yao
In this study, the facile synthesis method of Bi 2 − x Zr x O 2 Se ( x = 0, 0.02, 0.04, and 0.06) ceramics using a combining the high-energy ball milling and cold pressing was reported. The effects of zirconium (Zr) doping on the microstructure and thermoelectric properties of Bi 2 O 2 Se were systematically investigated. The results indicate that the powder samples were synthesized as a single phase with no impurities. With increasing Zr content, conductivity increased from 13.49 S to 34.91 S cm −1 at 773 K. The thermal conductivity of Bi 1.98 Zr 0.02 O 2 Se was also reduced to 0.51 W m −1 K −1 . The maximum power factor (PF) value of the Bi 1.96 Zr 0.04 O 2 Se sample was 186 μW m −1 K −2 at 773 K. A peak ZT of around 0.27 was achieved for the Bi 1.96 Zr 0.04 O 2 Se sample, which is approximately 2.4 times greater than that of un-doped one (∼0.11). The results indicate that Zr-doping significantly improves the thermoelectric properties of the Bi 2 O 2 Se system.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2022
·
IF 3.407
Peng Chen,Xin Shan,Xin Lin,Heyan Yuan,Yangyang Xie,Fang Wang,Kailiang Zhang
Bi 2 O 2 Se has attracted a lot of attention in the field of photodetection due to its ultra-high mobility and tunable band gap. However, the mechanism of controllable preparation of high-quality Bi 2 O 2 Se is unclear and needs further investigation. In this paper, the concentration of reactants in the substrate region was increased by the method of space-compression, the number of nucleation was effectively controlled, and larger size Bi 2 O 2 Se was obtained. And the nucleation and selenylation mechanisms of Bi 2 O 3 were revealed based on the effect of temperatures modificatives growth of Bi 2 O 2 Se. And the controlled growth was achieved in a certain thickness range by increasing the reactant concentration in the substrate region and controlling the nucleation number. Moreover, photodetectors were constructed based on the highly crystalline Bi 2 O 2 Se. The photodetector exhibited a photoresponsivity of up to 9550 A/W under the excitation of 405 nm light and obtained highly stable and recoverable characteristics with multiple laser switches.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Deng Ding,Zhuo Jiang,Dong Ji,Myung Nosang Vincent,Ling Zan
To enhance the photocatalytic activity, co-catalysts are often utilized to accelerate rate-limited surface reactions. Herein, various amounts of bismuth oxyselenide (Bi 2 O 2 Se) ( i.e. , 5 to 25 wt%) as a novel co-catalyst were deposited on TiO 2 nanoparticles for photocatalytic hydrogen evolution reaction. The 15% Bi 2 O 2 Se/TiO 2 showed the best enhanced hydrogen production rate of 1240.7 μmol h −1 g −1 , which was about 50 times greater than that of pure TiO 2 . The SEM, EDX-Mapping and TEM revealed the mechanism of in-growth of Bi 2 O 2 Se on the TiO 2. Trapping experiment of superoxide free radical (O 2 − ) and transient photocurrent decay measurement also revealed that the recombination of the photogenerated electron–hole was remarkably suppressed in Bi 2 O 2 Se/TiO 2 compared to pure TiO 2 . Detailed analysis of XPS, transient photocurrent responses, electrochemical impedance spectroscopy (EIS) and DFT calculations indicated that there is a strong interaction between Bi 2 O 2 Se and TiO 2 , and the electrons of TiO 2 can be injected into Bi 2 O 2 Se. These findings show the potential of Bi 2 O 2 Se as co-catalytic materials and open a new avenue for solar water splitting.
研究领域:
材料科学
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能源科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 6
·1-12
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IF 2.8
Zhou Silan,Zhao Nanyin,Li Jun
Electrochromic materials are substances that undergo the implantation or removal of electrons and ions in response to an electric field, which is redox reactions. These materials can change from one color to another and exhibit a reversible color change after a reverse voltage is applied. In this study, we report a novel material, Bi 2 O 2 Se, capable of both electrochromic and electrochemical energy storage. We successfully synthesized Bi 2 O 2 Se nanosheets using a hydrothermal method. Electrochemical tests on the Bi 2 O 2 Se nanosheets were conducted utilizing a three-electrode system at an electrochemical workstation. Under the influence of an electric field, the Bi 2 O 2 Se nanosheets transitioned from gray to yellow. This discoloration behavior was reversible upon applying reverse voltage, thereby exhibiting an electrochromic effect. Discharge at a voltage of 0 V after discoloration, resulting in reverse current generation. During this discharge process, the color of the Bi 2 O 2 Se electrode gradually recovers, exhibiting its energy storage capability. These findings suggest that Bi 2 O 2 Se nanosheets hold promise for potential applications that integrate both electrochromic functionality and energy storage capabilities. In the near future, they are likely to have a substantial impact on our daily lives.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Small
·
2019
·Vol. 16
·期 1
·1905208
·
IF 10.856
Hanhan Xie,Mingqiang Liu,Baihao You,Guanghong Luo,Yue Chen,Bilu Liu,Zhenyou Jiang,Paul K. Chu,Jundong Shao,Xue-Feng Yu
As new 2D layered nanomaterials, Bi 2 O 2 Se nanoplates have unique semiconducting properties that can benefit biomedical applications. Herein, a facile top-down approach for the synthesis of Bi 2 O 2 Se quantum dots (QDs) in a solution is described. The Bi 2 O 2 Se QDs with a size of 3.8 nm and thickness of 1.9 nm exhibit a high photothermal conversion coefficient of 35.7% and good photothermal stability. In vitro and in vivo assessments demonstrate that the Bi 2 O 2 Se QDs possess excellent photoacoustic (PA) performance and photothermal therapy (PTT) efficiency. After systemic administration, the Bi 2 O 2 Se QDs accumulate passively in tumors enabling efficient PA imaging of the entire tumors to facilitate imaging-guided PTT without obvious toxicity. Furthermore, the Bi 2 O 2 Se QDs which exhibit degradability in aqueous media not only have sufficient stability during in vivo circulation to perform the designed therapeutic functions, but also can be discharged harmlessly from the body afterward. The results reveal the great potential of Bi 2 O 2 Se QDs as a biodegradable multifunctional agent in medical applications.
研究领域:
生物医学工程
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纳米医学
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癌症治疗
✓ 已验证
DOI
PubMed
高影响因子
CARBON
·
2023
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IF 10.9
Ci Lin,Xiaolong Zhao,Yejun Xiao,Shahid Sattar,Lei Tang,Adeela Nairan,Yu Guo,Mingyu Xia,Carlo Maria Canali,Usman Khan,Dennis Y.C. Leung
Enabling highly efficient photocatalytic hydrogen production from solar-driven water splitting is of immense potential and environmental significance. However, the crucial issue of the low utilization efficiency of photogenerated charges in most photocatalysts , such as polymeric graphitic carbon nitride , g-C 3 N 4 (CN), hampers the overall photocatalytic activity and hinders practical applications. To surmount this parasitic phenomenon, we develop a heterojunction-based strategy that improves the charge separation efficiency in CN. The heterostructure is constructed between thermally exfoliated CN and liquid phase exfoliated Bi 2 O 2 Se (BOS) via a solution-phase, electrostatically driven self-assembly process. The properly aligned band positions between the two components create a built-in electric field, which endows the composite with an enhanced charge separation efficiency. The optimized Pt-deposited heterostructure photocatalyst exhibits a hydrogen production rate of 6481 μmol h −1 g −1 , and an apparent quantum efficiency of 11.65% at 420 nm, compared to those of Pt-deposited ECN (4595 μmol h −1 g −1 , 6.64 %). We validate the efficient charge separation effect and the prolonged lifetime of photogenerated carriers in the heterostructure using a series of comprehensive characterizations across multiple timescales, thus, elucidating the origin of the observed photocatalytic activity. This demonstration offers valuable insights into improving the utilization efficiency of photogenerated charges for photocatalysis by heterostructure engineering with materials of distinct electronic configurations.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 32
·12571-12581
·
IF 5.7
Kaiyi Zhang,Fang Wang,Lei Zheng,Junqing Wei,Yongxu Hu,Yangyang Xie,Hongling Guo,Fengpu Zhang,Xin Lin,Zewen Li,Tianling Ren,Zhitang Song,Kailiang Zhang
2D Bi2O2Se is an intriguing building block for next-generation optoelectronic devices owing to its ultrahigh electron mobility and ultrabroadband photodetection capability. However, fully exploiting its advantages in advanced optoelectronic applications remains greatly challenging owing to the lack of in-depth understanding of the morphological evolution of Bi2O2Se crystals and efficient methods for enhancing their photoresponse. Herein, we developed a novel “cage-confinement” technique to achieve dimensionality-tunable growth of Bi2O2Se crystals in a space-confined CVD system. It can effectively control the key parameter of determining the dimensionality of crystals, referred to as the elastic strain energy of nucleation (ΔGs), by tuning the active area size of Bi2O3 seeds at a suitable flow rate of carrier gas. Furthermore, based on an optimized van der Waals transfer technique of crystals and electrodes, a sheet-shaped phototransistor of Bi2O2Se has a high responsivity (R) of ∼74 000 A W−1 and detectivity (D*) of ∼4.0 × 1011 Jones. Meanwhile, a wire-shaped device demonstrates an impressive R value of 300 000 A W−1, D* value of 3.9 × 1012 Jones and photoconductance gain (Gph) of 1.2 × 105. These results surpass most reported Bi2O2Se-based detectors and pave the way for the applications of 2D layered semiconductors in advanced optoelectronic devices and technologies.
研究领域:
材料科学
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光电子学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Fengpu Zhang,Fang Wang,Shuyu Xu,Xiangjie Zhang,Xin Lin,Zewen Li,Junqing Wei,Zhitang Song,Kailiang Zhang
As an emerging 2D-layered semiconductor material, the Bi2O2Se nanosheet has shown great application potential in the field of electronics and optoelectronics due to its high carrier mobility, superior air stability, and tunable bandgap. However, the mechanism of controllable synthesis of Bi2O2Se nanosheets is still unclear, and further basic research and applications are urgently needed in the field of photovoltaics. In this paper, Bi2O2Se nanosheets were prepared based on the “dual-source independent control” method, and photodetectors were demonstrated on Si/SiO2. The device has a mobility of 258.6 cm2 V–1 s–1, responsivity of 8030 A/W at 532 nm (0.32 mW/cm2), and detectivity of 1.972 × 1011 Jones, and the detector obtains highly stable and recoverable properties with multiple laser switches. The modulation mechanism of Bi2O2Se-based photodetectors is then explored based on the I–V characteristics of photodetectors and photoconductivity effect solutions.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Xiaoyang Mu,Chao Li,Li Wang,Rumeng Zhang,Yingping Huang,Xiang Yu,Po Keung Wong,Liqun Ye
Solar-induced sterilization via photothermal synergy has attracted enormous attention due to its zero-energy consumption and the elimination of hazardous chemical disinfectant. Herein, we successfully synthesized a super biosafety Bi 2 O 2 Se with crossed nanosheet structure (Bi 2 O 2 Se-CN) for the sterilization of Escherichia coli ( E. coli ) via solar-induced photothermal synergistic effect. In comparison to bulk Bi 2 O 2 Se, the lower light reflection and more efficient photogenerated charge carrier separation under visible-infrared light irradiation resulted in the excellent sterilization effect of Bi 2 O 2 Se-CN, with a sterilization efficiency of 99.9% under the synergistic effect of light and heat. The crossed ultrathin nanosheet structure and suitable band gap width of Bi 2 O 2 Se-CN are fundamental reasons for its enhanced light absorption and charge carrier separation efficiency. Mechanistic studies showed that Bi 2 O 2 Se-CN can completely inactivate bacteria via generating a large amount of reactive oxygen species (•O 2 - , •OH, and 1 O 2 ) to attack the cell membrane, which further resulted in the reduced activity of intracellular enzymes and the leakage of intracellular contents. The biosafety property of Bi 2 O 2 Se-CN was confirmed by in vivo toxicological evaluation on the mice model. This work provided new ideas for the design of more efficient, energy-saving, biocompatible and environmental friendly solar water purification projects.
研究领域:
环境科学
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材料科学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Jun Gou,Xiutao Yang,Hang Yu,He Yu,Yuchao Wei,Ziyi Fu,Laijiang Wei,Zexu Wang,Jiayue Han,Zhiming Wu,Yadong Jiang,Jun Wang
Conventional nm-scale Bi 2 O 2 Se-based near-infrared (NIR) photodetectors (PDs) exhibit commendable performance in terms of responsivity and response speed. Currently, the growing complexity of application scenarios requires NIR PDs to possess not only these fundamental functionalities but also the capability for NIR polarization detection and operation well under dim light conditions. Here, this study proposes the 2D ReS 2 /3D Bi 2 O 2 Se homo-heterojunction PD, which exhibits high photo-response speed, polarization-sensitive detection capabilities, and enhanced sensitivity in the NIR spectrum. In detail, a device constructed from µm-thick Bi 2 O 2 Se demonstrates polarization-sensitive photodetection at a wavelength of 850 nm, exhibiting a polarization ratio of 1.4 achieved by applied voltage modulation. Based on photogating effect and strong intrinsic absorption, the homo-heterojunction PD also can detect light power level of nW at 1310 nm, with a response speed of ≈10 µs and responsivity of 34.8 A W −1 at this wavelength. Additionally, this configuration exhibits an outstanding specific detectivity exceeding 10 10 Jones within the wavelength range of 700 to 1310 nm. Even at a cut-off wavelength of 1550 nm, the device achieves a specific detectivity of ≈10 9 Jones. The ReS 2 /Bi 2 O 2 Se heterojunction NIR PD shows promise for advanced optoelectronic applications due to its high sensitivity and polarization-sensitive photodetection in NIR band.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Gexiang Chen,Yang Zhou,Ganbo Zhang,Jun Li,Xiang Qi
Flexible photodetectors have attracted great attention in fields such as display screens, aerospace, and civil engineering due to their wearable and large-area foldable advantages. Therefore, the hybrid structure of Bismuth oxyselenide(Bi 2 O 2 Se)/Graphene was successfully synthesized in this work through mechanical compound method. In addition, we constructed a photodetector based on solid-state electrolyte, which has the advantage of small size, light weight, and portability. Photoelectrochemical tests show that the Bi 2 O 2 Se/graphene photodetector based on solid-state electrolyte has excellent photoresponse characteristics under 0 V, and its photocurrent density is 400 nA/cm 2 when the optical power is 120 mW/cm 2 . In addition, the Bi 2 O 2 Se/graphene photodetector exhibits superb flexibility. After different bending angles and bending times, the photocurrent slightly decreases, which may be due to small cracks in the bending process. Finally, the tested Bi 2 O 2 Se/graphene solid-state photodetector showed excellent stability. The photocurrent was only slightly reduced after 1000 s, which was 81% of the original value. The result shows that the hybrid structure of Bi 2 O 2 Se/Graphene has potential in the field of photodetectors with exceptional performance, excellent stability and mechanical properties.
研究领域:
材料科学
·
电化学
·
光子学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）