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
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·Vol. 13
·期 17
·2500216
·
IF 7.2
Xin Wang,Le-Yang Dang,Xu Zhang,Jia-Qi Zhu,Gui-Gen Wang
Doping can effectively adjust the energy band structure of a semiconductor, thereby influencing its electrical and optical properties. In this study, density functional theory is employed to calculate the crystal structure, electronic configurations, energy bands, and optical properties of tellurium-doped Bi 2 O 2 Se (Bi 2 O 2 Se 1-x Te x ), demonstrating that Te substitution lowers the conduction band, reducing the bandgap. Then 2D Bi 2 O 2 Se 1-x Te x nanosheets are synthesized via organic ion template-guided solution growth method, with Te doping controlled by the Te/Se molar ratio. Optical spectroscopy confirmed that tellurium doping significantly modulates the electronic properties of Bi 2 O 2 Se. When the doping molar concentration is 30%, its bandgap decreases to 0.57 eV. Therefore, Bi 2 O 2 Se 1-x Te x nanosheet-based photodetector demonstrates obvious enhancement of the photoelectric response in the near-infrared region. Notably, Bi 2 O 2 Se 0.7 Te 0.3 photodetector demonstrates broadband photosensitivity across 650–1550 nm, with high responsivity of 32.87 A W −1 and enhanced detectivity of 8.89 × 10 9 Jones at 1060 nm. The device also features a short response time of 16.8/11 µs at 1550 nm. Moreover, the photo-response of the detector shows reliable working stability. Finally, the photodetector is utilized for single-pixel imaging, showcasing its high-contrast infrared light detection capability. These results indicate that Bi 2 O 2 Se 1-x Te x is a promising material for high-sensitivity infrared light detection applications.
研究领域:
材料科学
·
凝聚态物理
·
光学工程
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产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 2
·157
·
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
·
化学工程
·
环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 6
·1-12
·
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
·
电化学
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DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jianzong Li,Mingfang Wu,Hanxiao Zhang,Siqi Li,Can Wang,Peiyao Wang,Jiulong Sha,Xuelian Zhou
Photoelectrochemical (PEC)-type photodetectors are gaining significant interest as neoteric self-powered devices, owing to their high spectral responsivity and quick photoresponse. However, the underlying leakage issue makes the aqueous electrolyte contained inside PEC-type photodetectors unsuitable for manufacturing flexible optoelectronics. In this study, we report a flexible, self-powered PEC-type photodetector based on a cellulose-based hydrogel. Using a cellulose-based hydrogel electrolyte as the electron-transferring medium and two-dimensional Bi2O2Se nanosheet-coated indium tin oxide glass as the working electrode, the photodetector exhibits excellent self-powered capability. The hydrogel-based PEC photodetector exhibits a broadband photoresponse in the range of 365–850 nm. Moreover, under the condition of an illumination wavelength of 365 nm at a bias voltage of 0.6 V, the photodetector exhibits a responsivity of 0.68 mA/W, a detectivity of 2.44 × 108 Jones, and a fast response time of 85/103 ms, which are comparable to those of photodetectors based on traditional aqueous electrolytes. Additionally, the hydrogel-based PEC photodetectors show good flexibility and stability, maintaining more than 70.3% of their photocurrent density even after 100 cycles of bending at 120°, and no obvious photocurrent decay is observed after storage for 1 week. Based on these results, cellulose-based hydrogel electrolytes have significant potential for future applications in self-powered photodetectors.
研究领域:
材料科学
·
光电子学
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产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2020
·Vol. 126
·期 7
·1-9
·
IF 1.81
Chen Gexiang,Wu Jie,Wang Bo,Li Jun,Qi Xiang
2D layered material Bi 2 O 2 Se nanosheets, due to its high carrier mobility, near-ideal subthreshold swing, and high air-stability, which have shown great potential for applications in high-performance field-effect transistors and photodetector. Here, we have been successfully synthesized Bi 2 O 2 Se nanosheets via a facile one-step hydrothermal method. The Bi 2 O 2 Se nanosheets were characterized by scanning electron microscopy (SEM), Raman spectra and X-ray diffraction (XRD) patterns, which confirm an excellent crystallized of Bi 2 O 2 Se nanosheets. The as-prepared Bi 2 O 2 Se nanosheets were used to fabricate electrodes for a self-powered photodetector and exhibit preferable photoresponse activity. At 0 V, the photoeletrochemical (PEC) tests demonstrate that the responsivity and the response time of Bi 2 O 2 Se nanosheets can reach up to 20 μA W −1 and 0.12 s. Furthermore, the time stability and cycle stability also were measured. After a long time of testing, the photocurrent of Bi 2 O 2 Se nanosheets remained around 300 nA, and after processing 100 and 200 cycles, the photocurrent exhibits slight distinction. These findings indicate that Bi 2 O 2 Se nanosheets have great prospects for future applications in self-powered photodetector devices.
研究领域:
材料科学
·
纳米技术
·
光子学
·
半导体器件
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiahu Yao,Yang Yang,Hu Zhao,Chuanming Wang,Liang Jin,Tengyun Long,Wei Huang,Xiang Zhan,Xin Li,Xin Chen,Jinhu Xie,Bin Wu,Chuansi Wang,Liling Huang,Hongnian Pan,Xuan Nie,Changjun Yu,Wei Chen
The accumulation of reactive oxygen species (ROS) within colonic tissue represents a critical factor in the pathogenesis of inflammatory bowel disease (IBD). The application of antioxidant therapy utilizing artificial nanozymes has emerged as an effective strategy for the management of IBD. Nevertheless, current nanozymes exhibit limitations in stability, tissue compatibility, and systemic toxicity, which constrain their applicability within the biomedical domain. Herein, we designed a biocompatible colon-targeted integrated therapeutic system (BiOSe-RA@FP), the core of which is Bi 2 O 2 Se (BiOSe) nanosheets encapsulating natural plant rosmarinic acid (RA), enclosed within pH-responsive enteric hydrogel microspheres (FP). This system ensures targeted delivery of BiOSe-RA to the inflamed colon and prolongs its local retention time. BiOSe-RA fully exerts the activities of superoxide dismutase (SOD) and catalase (CAT) in the colon, effectively removing ROS (·OH, ·O 2 − , and H 2 O 2 ). Concurrently, BiOSe-RA exerts excellent anti-inflammatory activities in the colon, which could inhibit the secretion of inflammatory factors, and induce macrophages to polarize the M2 type. The ultimate effect is to preserve the integrity of the intestinal epithelial mucosal barrier and restore microbial homeostasis in the colon by mitigating intestinal oxidative stress and ameliorating the inflammatory microenvironment. The constructed BiOSe-RA@FP could regulate intestinal microbial community disorders, providing a safe and effective new solution for the treatment of IBD.
研究领域:
纳米技术
·
药学
·
胃肠病学
·
免疫学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）