ACS Sensors
·
2025
·
IF 9.1
Xinxin He,Xuanyu Ren,Xuyang An,Ping Guo,Yinhua Hu,Tiezhu Liu,Jia Zhang
Monitoring sulfur dioxide (SO2) is crucial for protecting human health as exposure to this pollutant can cause respiratory and cardiovascular illnesses, particularly in vulnerable populations. The primary materials currently used for detecting SO2 are metal oxides. However, it is still a challenge to detect SO2 at the parts per billion (ppb) level via these materials even when operated at high temperatures. Herein, we propose a highly sensitive SO2 sensor that operates at room temperature (RT). The sensing material employed is the hydrothermally synthesized bismuth oxyselenide (Bi2O2Se) nanosheets. The Bi2O2Se sensor exhibits a response value of 34% to 1 ppm SO2 and a detection limit of 20 ppb, which surpasses most SO2 sensors reported to date. The superior sensitivity and selectivity of Bi2O2Se nanoppbsheets toward SO2 are attributed to their strong adsorption energy (−0.76 eV) and significant electron transfer (2.205 e) between Bi2O2Se and SO2 molecules, as confirmed by density functional theory (DFT) calculations. Finally, a wireless SO2 sensing system is designed and implemented based on the SO2 sensor, enabling the detection of trace-level SO2 in indoor environments such as factories and laboratories, thereby protecting the well-being of personal further.
研究领域:
材料科学
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环境监测
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Huifang Lv,Haibo Rao,Zhiyu Zhou,Yang Zhao,Hualiang Wei,Zexiang Chen,Xiao Zhang,Yunlu Dai,Yanli Gong,Yan Wang
Improving the energy storage capabilities of aqueous alkaline supercapatteries relies heavily on the development of high-performance anode materials. Here, we presented a one-step composite molten salts method for the preparation of cobalt selenium hydroxide and Bi 2 O 2 Se heterostructure composites (CoSe(OH)/Bi 2 O 2 Se). The composite capitalizes on the advantageous interlayer properties of two-dimensional (2D) layered Bi 2 O 2 Se, connected via weak Van der Waals forces, alongside the high theoretical specific capacity of cobalt hydroxide derived from cobalt selenium hydroxide. This synergy facilitates efficient ion transport, thus exhibiting remarkable electrochemical characteristics. Specifically, CoSe(OH)/Bi 2 O 2 Se demonstrates a great specific capacity of 313.6 mAh/g at 1 A/g, significantly outperforming pure Bi 2 O 2 Se nanosheets. Moreover, CoSe(OH)/Bi 2 O 2 Se exhibits remarkable rate capability with 63.8% capacitance retention at sufficiently high current density (20 A/g), and excellent cycle performance that the capacitance remains is 70.3% after 1000 cycles of GCD testing. Additionally, ex-situ XRD analysis of CoSe(OH)/Bi 2 O 2 Se at different charge and discharge stages provides further insights into its energy storage mechanism. Furthermore, the NiAl-Cl LDH// CoSe(OH)/Bi 2 O 2 Se device demonstrates high power density and energy density. These results validate the feasibility of enhancing the electrochemical performance of 2D Bi 2 O 2 Se layered materials through the incorporation of active and cost-effective transition metal oxides/hydroxides, highlighting the tremendous potential of CoSe(OH)/Bi 2 O 2 Se as a negative electrode material for aqueous alkaline supercapattery.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2023
·
IF 4
Heyan Yuan,Fang Wang,Xin Lin,Xin Shan,Kaiyi Zhang,Jixiang Zhong,Yujing Ji,Ke Shan,Yangyang Xie,Kai Hu,Zhitang Song,Kailiang Zhang
As an emerging ultrathin semiconductor material, Bi 2 O 2 Se has shown outstanding performance in fields of electronics, optoelectronics and ultrafast optics. High performance Bi 2 O 2 Se nanosheets were desperately needed for further foundational research and practical applications. However, their synthesis has not yet been completely developed. In this paper, high quality Bi 2 O 2 Se nanosheets were efficiently obtained by sdjusting synthesis pressure. The uniform nucleation of Bi 2 O 2 Se nanosheets on substrates was achieved, put forward the nucleation mechanism of Bi 2 O 2 Se nanosheets. The near-infrared (NIR) optoelectronic properties of multilayer Bi 2 O 2 Se nanosheets were systematically investigated. Photodetectors were constructed based on Bi 2 O 2 Se nanosheets of different thicknesses and the near-infrared (NIR) photoelectric properties of Bi 2 O 2 Se-based photodetectors with the highest responsivity were systematically investigated. The multilayer Bi 2 O 2 Se nanosheets exhibit sensitive responsivity to the NIR, including high responsivity (∼825 A/W), high external quantum efficiency (∼1.25 × 10 5 %) and high detectivity (6 × 10 10 Jones). These results suggest that devices based on multilayer Bi 2 O 2 Se nanosheets may have great potential for future applications in ultrafast, high-sensitivity NIR optoelectronic devices.
研究领域:
材料科学
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光学
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电子工程
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 23
·2201396
·
IF 10.05
Yuchao Wei,Chao Chen,Chong Tan,Le He,Zhengze Ren,Chaoyi Zhang,Silu Peng,Jiayue Han,Hongxi Zhou,Jun Wang
Owing to its suitable electronic bandgap, excellent air stability, and high carrier mobility at room temperature, low-dimensional bismuth oxyselenide (Bi 2 O 2 Se) has become attractive in the context of visible–near-infrared (VIS–NIR) detection. However, the high carrier concentration and bolometric effect of Bi 2 O 2 Se nanosheets are not conducive to reducing the dark current and improving the response speed, which hinders Bi 2 O 2 Se nanosheet-based photodetectors from achieving an optimal performance. In this study, a Bi 2 O 2 Se nanoribbon is controllably synthesized on a fluorophlogopite substrate by means of the chemical vapor deposition approach. Through the use of a Bi 2 O 2 Se nanoribbon structure and the application of a Schottky barrier between the Bi 2 O 2 Se and Au electrodes, a fast response and low noise photodetector is achieved. More specifically, the response times are 2.1 and 313 µs at 650 and 1550 nm, respectively, and the corresponding optimal detectivities are 3.28 × 10 13 and 8.07 × 10 9 Jones. Furthermore, the device reaches a −3 dB bandwidth of 81 kHz and exhibits a responsivity of 3.2 × 10 5 A W −1 at 650 nm under a bias of 5 V. This study provides new opportunities for the application of high-performance VIS–NIR photodetectors.
研究领域:
材料科学
·
光电探测
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DOI
高影响因子
ADVANCED MATERIALS
·
2018
·Vol. 30
·期 31
·1801021
·
IF 21.95
Xiangling Tian,Hongyu Luo,Rongfei Wei,Chunhui Zhu,Qianyi Guo,Dandan Yang,Fengqiu Wang,Jianfeng Li,Jianrong Qiu
Pulsed lasers operating in the mid-infrared (3–25 µm) are increasingly becoming the light source of choice for a wide range of industrial and scientific applications such as spectroscopy, biomedical research, sensing, imaging, and communication. Up to now, one of the factors limiting the mid-infrared pulsed lasers is the lack of optical switch with a capability of pulse generation, especially for those with wideband response. Here, a semiconductor material of bismuth oxyselenide (Bi 2 O 2 Se) with a facile processibility, constituting an ultrabroadband saturable absorber for the mid-infrared (actually from the near-infrared to mid-infrared: 0.8–5.0 µm) is exhibited. Significantly, it is found that the optical response is associated with a strong nonlinear character, showing picosecond response time and response amplitude up to ≈330.1% at 5.0 µm. Combined with facile processibility and low cost, these solution-processed Bi 2 O 2 Se materials may offer a scalable and printable mid-infrared optical switch to open up the long-sought parameter space which is crucial for the exploitation of compact and high-performance mid-infrared pulsed laser sources.
研究领域:
光学
·
光子学
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材料科学
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半导体物理
·
激光技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）