INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Shanshan Wu,Meng Tian,Yang Hu,Nan Zhang,Wei Shen,Jianyi Li,Linchuan Guo,Pengfei Da,Pinxian Xi,Chun-Hua Yan
Formate is identified as economically viable chemical fuel from electrochemical carbon dioxide reduction. However, the selectivity of current catalysts toward formate is limited by the competitive reaction such as HER. Herein, we propose a CeO2 modification strategy to improve the selectivity of catalysts for formate through tuning of the *OCHO intermediate, which is important for formate production.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 9
·1-9
·
IF 5.3
Si Zhongzhou,Shao Rong,Li Ting,Yang Minghui
Photoelectrochemical biosensor based on Bi 2 S 3 /Bi 2 O 2 CO 3 heterojunction as photoelectrically active material and lactate oxidase was constructed for sensitive detection of lactic acid in serum. Topological transformation method was utilized to prepare Bi 2 S 3 /Bi 2 O 2 CO 3 composites, which can generate electron–hole pairs triggering photoelectrochemical reactions under light illumination. The Bi 2 S 3 /Bi 2 O 2 CO 3 heterojunction effectively promoted the separation and transportation of photogenerated electrons and holes, leading to improved photoelectric conversion efficiency. Lactic acid is catalyzed by lactate oxidase to generate H 2 O 2 , which reacts with photogenerated holes, leading to photocurrent increase, achieving quantitative detection of lactic acid. The prepared biosensor has a wide detection range for lactic acid from 0.01 mM to 10 mM, with detection limit as low as 0.006 mM. In addition, the detection of lactic acid in serum samples further validated the potential application of the sensor. Graphical abstract
研究领域:
生物传感器
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临床检验
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纳米材料应用
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光电化学分析
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生物医学检测
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Yu Liu,Jian Zheng,Zhijia Zhu,Zhangmi Huang,Chunyan Hu,Baojiang Liu
Although the presence of the built-in electric field will solve the problem of carrier complexation in photocatalytic systems to some extent. However, free carriers will quickly shield the stabilized electric field and lose its effect. Therefore, how to introduce the dynamic piezoelectric field into the photocatalytic system has become an imminent problem. Herein, we developed an overcoated, visible light responsive, piezoelectric-assisted photocatalytic system by depositing Bi 2 S 3 photocatalysts with a narrow-band system onto the surface of highly piezo-responsive BaTiO 3 nanorods (BTO NRs). The heterojunction structure, bound by Bi-O chemical bonding, enhances carrier transport efficiency under the influence of the piezoelectric field. In the degradation experiments, the first-order rate constant for the degradation of chlortetracycline hydrochloride (CTC) in the BTO NRs/Bi 2 S 3 system with the optimal complex ratio was 0.0276 min −1 , which was 3.1 and 7.8 times higher than that of BTO NRs and Bi 2 S 3 , respectively. Additionally, we deduced the degradation pathways of CTC through a combination of Density functional theory (DFT) calculations and Liquid Chromatograph Mass Spectrometer (LC-MS), evaluating the toxicity of the intermediates. This complex system, featuring a highly photo-responsive semiconductor as a photo-acceptor deposited on a piezoelectric semiconductor surface providing a dynamic built-in electric field, enhances carrier separation efficiency under optimal light energy utilization conditions. These findings present novel and effective strategies for addressing two primary challenges in photocatalytic systems: low spectral utilization and significant photogenerated carrier complexation.
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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产品关联
DOI
PubMed
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2020
·Vol. 14
·期 4
·1900679
·
IF 2.291
Xi Chen,Fanggong Cai,Chuanrong Liu,Rong Dong,Lanxin Qiu,Lili Jiang,Guocai Yuan,Qinyong Zhang
Decoupling the electric conductivity, Seebeck coefficient, and thermal conductivity is a core issue to improve the properties of thermoelectric materials by tuning the electron and phonon transport properties. Herein, Bi 2 Te 2.7 Se 0.3 /Bi 2 S 3 heterostructure is successfully synthesized by a simple anion exchange method with Bi 2 Te 2.7 Se 0.3 as the starting material. The Bi 2 Te 2.7 Se 0.3 /Bi 2 S 3 heterointerfaces can achieve an effective phonon scattering and significant decrease in thermal conductivity, while maintaining a high power factor, resulting in an enhanced figure of merit ( ZT ). By controlling the concentration of Bi 2 Te 2.7 Se 0.3 /Bi 2 S 3 heterointerfaces, the carrier-transporting and phonon-scattering behaviors can be simultaneously optimized. A maximum ZT of 0.7 is obtained at 473 K, which is 23% higher than that of pure Bi 2 Te 2.7 Se 0.3 . In addition, the average ZT at 300–548 K increases from 0.49 to 0.61, which is 25% higher than that of pure Bi 2 Te 2.7 Se 0.3 .
研究领域:
材料科学
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物理学
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产品关联
DOI
高影响因子
Chemosensors
·
2021
·Vol. 9
·期 8
·190
·
IF 3.398
Chengling Qu,He Li,Shuang Zhou,Guodong Li,Cheng Wang,Rony Snyders,Carla Bittencourt,Wenjiang Li
The engineering of an efficient electrochemical sensor based on a bismuth sulfide/reduced graphene oxide (Bi2S3/rGO) composite to detect ascorbic acid (AA) is reported. The Bi2S3nanorods/rGO composite was synthesized using a facile hydrothermal method. By varying the amount of graphene oxide (GO) added to the synthesis, the morphology and size of Bi2S3nanorods anchored on the surface of rGO can be tuned. Compared to a bare glassy carbon electrode (GCE), the GCE modified with Bi2S3/rGO composite presented enhanced electrochemical performance, which was attributed to the optimal electron transport between the rGO support and the loaded Bi2S3as well as to an increase in the number of active catalytic sites. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis of Bi2S3/rGO/GCE demonstrate that the active Bi2S3/rGO layer on GCE plays an important role in the electrochemical behavior of the sensor. In particular, the Bi2S3/rGO/GCE sensor shows a wide detecting range (5.0–1200 μM), low detection limit (2.9 µM), good sensitivity (268.8 μA mM−1cm−2), and sufficient recovery values (97.1–101.6%) for the detection of ascorbic acid.Keywords:Bi2S3;reduced graphene oxide;ascorbic acid;electrochemical sensor
研究领域:
材料科学
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分析化学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Chong Li,Ran Tao,Jianlei Zhang,Jinlong Chen,Chen Fu,Jikai Zhang,Huiling Ong,Chenze Lu,Yi Chen,Qiang Wu,Jing-Ting Luo,Yongqing Fu
Along with the revolution of the Internet of Things (IoT), smart, flexible, easily fabricated, and highly sensitive gas sensors are essential for many portable electronics. In this study, a wearable NO2 sensor based on a nanomesh structure woven with Ti3C2Tx microflakes and Bi2S3 nanobelts operated at room temperature was successfully designed and prepared. The effects of the mass ratio between two materials on the performance were evaluated. Bi2S3 nanobelts embedded inside accordion-like Ti3C2Tx provide large specific surface areas and abundant active sites for the adsorption of NO2 molecules. Attributed to the high conductivity of Ti3C2Tx, the carriers generated in the sensitive layers are easily transmitted during sensing, thus significantly reducing the response and recovery times. The sensor based on the nanomesh containing 30 wt % Ti3C2Tx exhibits excellent sensing performance, fast response/recovery rates, and high stability even in arbitrary deformed shape conditions. Upon exposure to 1 ppm NO2, the response of the sensor is 12.67, and the response/recovery times are 5/28 s, respectively. A stable sensing performance can be maintained after 1500 cycles of deformation. This work demonstrates a simple but reliable manufacturing strategy of wearable gas sensors for the next generation of IoT monitoring network-linking human activities.
研究领域:
材料科学
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传感器技术
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物联网应用
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产品关联
DOI
高影响因子
Small
·
2023
·
IF 13.3
Zi-Yuan Wang,Jun Guo,Yu Wang,Yi-Xing Zhang,Jing Feng,Zhen-Hua Ge
Bismuth sulfide is a promising thermoelectric material because of its low cost and toxicity; however, its low electrical conductivity limits its thermoelectric properties. In this study, Bi 2 S 3 + x wt% HfCl 4 ( x = 0, 0.25, 0.5, 0.75, and 1.0) bulk samples are fabricated using a combination of melting and spark plasma sintering. The microstructures, electronic structures, and thermoelectric properties of the composites are characterized. The results of electronic structure calculations show that doping with HfCl 4 produces an impurity energy level that narrows the bandgap and allows the Fermi energy level to enter the conduction band, leading to a favorable increase in carrier concentration. By regulating the HfCl 4 doping concentration, the electrical conductivity of the 0.75 wt% doped sample reaches 253 Scm −1 at 423 K and its maximum ZT value is 0.47 at 673 K. Moreover, the sample is compounded with Bi 2 S 3 nanorods prepared by the hydrothermal method, reducing thermal conductivity by 30% due to the introduction of additional interfaces and pores. This resulted in a final ZT value of 0.61 at 673 K, which is approximately eight times higher than that of pure Bi 2 S 3 . This step-by-step optimization approach provides a valuable methodology for enhancing the performance of other thermoelectric material systems.
研究领域:
材料科学
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物理学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2020
·Vol. 21
·期 12
·4224
·
IF 4.556
Wenxiu Yang,Yonggui Li,Long Feng,Yimiao Hou,Shuo Wang,Bo Yang,Xuemin Hu,Wei Zhang,Seeram Ramakrishna
Photothermal conversion materials have attracted wide attention due to their efficient utilization of light energy. In this study, a (GO)/Bi2S3-PVDF/TPU composite nanofiber membrane was systematically developed, comprising GO/Bi2S3nanoparticles (NPs) as a photothermal conversion component and PVDF/TPU composite nanofibers as the substrate. The GO/Bi2S3NPs were synthesized in a one-step way and the PVDF/TPU nanofibers were obtained from a uniformly mixed co-solution by electrospinning. GO nanoparticles with excellent solar harvesting endow the GO/Bi2S3-PVDF/TPU membrane with favorable photothermal conversion. In addition, the introduction of Bi2S3NPs further enhances the broadband absorption and photothermal conversion properties of the GO/Bi2S3-PVDF/TPU composite membrane due to its perfect broadband absorption performance and coordination with GO. Finally, the results show that the GO/Bi2S3-PVDF/TPU composite membrane has the highest light absorption rate (about 95%) in the wavelength range of 400–2500 nm. In the 300 s irradiation process, the temperature changes in the GO/Bi2S3-PVDF/TPU composite membrane were the most significant and rapid, and the equilibrium temperature of the same irradiation time was 81 °C. Due to the presence of TPU, the mechanical strength of the composite film was enhanced, which is beneficial for its operational performance. Besides this, the morphology, composition, and thermal property of the membranes were evaluated by corresponding test methods.Keywords:graphene oxide/bismuth sulfide;solar distillation;nanofiber membrane;photothermal conversion
研究领域:
材料科学
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纳米技术
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太阳能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 39
·24290-24295
·
IF 3.945
Jun Guo,Zi-Yuan Wang,Lin Chen,Yu-Ke Zhu,Ying Zhou,Quan Shan,Jing Feng,Zhen-Hua Ge
The hexagonal Bi0.33(Bi6S9)Br intermediate was incorporated to enhance the thermoelectric properties of Bi2S3 by a facile synthesis process. As a result of the increase of carrier concentration caused by Br diffusion doping and the enhancement of phonon scattering caused by pores, point defects, and secondary phase interfaces, a maximum ZT value of 0.64 was achieved at 773 K in Bi2S3 + 5% Bi0.33(Bi6S9)Br. This study provides a strategy for achieving Br doping in the Bi2S3 system by adding the Bi0.33(Bi6S9)Br intermediate alloy, while the nanostructure was maintained in the matrix, which may be also suitable for other thermoelectric materials to obtain higher performance.
研究领域:
材料科学
·
物理学
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产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 9
·095005
·
IF 1.449
Hui-Li Zhu,Qing-Yuan Cheng,Mei-Yan Liao,Zhi-Ling Zhang,Wei-Guo Cai,Jiao-Jiao Ma,Meng-Ying Sun,Ming-Xia Yu,Zhi-Quan Tian,Dai-Wen Pang
Ultra-small Bi2S3 nanoparticles are potential contrast agents for high-sensitive CT imaging. However, the expensive and harmful synthesis process limited their further application. Herein, an economical and low-toxic process was developed by employing S powders as sulfur precursors for large-scale preparation of ultra-small Bi2S3 nanoparticles. The as-prepared ultra-small Bi2S3 nanoparticles were modified with amine-terminated poly(ethylene glycol) (PEG) to produce water-soluble contrast agents. In vitro experiment results suggested that the ultra-small Bi2S3-PEG nanoparticles were low cytotoxic and superior contrast agents. In vivo experiments demonstrated that the ultra-small Bi2S3-PEG nanoparticles were preferred contrast agents for long-term and high-sensitive CT imaging.
研究领域:
医学影像学
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纳米医学
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xing Yang,Jun Guo,Zi-Yuan Wang,Wen-Hao Gu,Quan Shan,Jing Feng,Zhen-Hua Ge
Bi 2 S 3 -based materials with low thermal conductivity and high Seebeck coefficient has been regarded as promising thermoelectric materials for years. To optimize the thermoelectric properties of Bi 2 S 3 materials, (Se, Cl)-co-doped nanostructured Bi 2 S 3 bulks were prepared by hydrothermal method combined with spark plasma sintering . The doping contents of Se and Cl in Bi 2 S 3 depend on the reaction time of the hydrothermal process. A high power factor of 450 μWm −1 K −2 was achieved for Bi 2 S 3 sample with the reaction time of 24 h owing to the substitution of S by Se and Cl. Meanwhile, a low thermal conductivity of 0.35 Wm −1 K −1 is obtained for the Bi 2 S 3 sample with the reaction time of 18 h, owing to the strong phonon scattering caused by the high density of grain boundaries, pores and point defect . Therefore, benefiting from the improved electrical transport properties and reduced thermal conductivity, a peak ZT value of ~ 0.57 was obtained at 673 K for the Bi 2 S 3 sample with the reaction time of 24 h.
研究领域:
材料科学
·
热电材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 7
·1-14
·
IF 2.8
Guo Yan,Zhang Xinxu,Zhang Rui,Li Aiyuan,Zhang Jiawen,He Hui
In this work, Bi 2 O 3 and Bi 2 S 3 nanomaterials are modified with polyvinylpyrrolidone (PVP). The products are defined as Bi 2 O 3 @PVP and Bi 2 S 3 @PVP, respectively. SEM demonstrates that the addition of PVP helps to reduce the size of Bi 2 O 3 and Bi 2 S 3 nanomaterials. XRD exhibits that the structure of Bi 2 O 3 changed from α-Bi 2 O 3 to β-Bi 2 O 3 @PVP due to the addition of PVP, while the Bi 2 S 3 configuration remained unchanged. XPS demonstrates that excess PVP leads to a partial reduction of trivalent Bi 3+ to metallic Bi 0 . Their supercapacitive performances are tested and it is found that appropriate PVP can improve the capacitive performance and cyclic stability of both Bi 2 O 3 and Bi 2 S 3 . The specific capacitance of Bi 2 O 3 @1 g PVP is 1.4 times that of the pristine Bi 2 O 3 , and the specific capacitance of Bi 2 S 3 @1 g PVP is 1.8 times that of the pristine Bi 2 S 3 . Compared with 82.0% Bi 2 O 3 and 79.6% Bi 2 S 3 , the cyclic retention is 94.7% and 95.2% for Bi 2 O 3 @1 g PVP and Bi 2 S 3 @1 g PVP after 10,000 cycles. The reason for enhancement is that PVP can support Bi 2 O 3 and Bi 2 S 3 materials, not only to support their structural stability but also to reduce their size and facilitate electron transfer and ion diffusion.
研究领域:
材料科学
·
电化学
✓ 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）