SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Da Xu,Feng Sun,Hong Shao,Feng Liu,Qianli Ma,Wensheng Yu,Feng Li,Xiangting Dong
Metal oxide semiconductors (MOSs) are widely utilized in the gas-sensing field owing to their superior gas sensing performances. Herein, a hierarchical nanostructure consisting of Bi 2 MoO 6 nanosheets (NSs) assembled on LaFeO 3 nanofibers (NFs) was successfully synthesized by combining an electrospinning with a solvothermal method . The full study of the sensing performances was conducted by manufacturing commercial gas sensors based on Bi 2 MoO 6 /LaFeO 3 hierarchical nanostructure in order to showcase its potential application in gas sensing. The results show that the sensor based on Bi 2 MoO 6 /LaFeO 3 hierarchical nanostructure exhibits excellent HCHO gas sensing performances including a high response (R a /R g = 36.5), a superior selectivity and a short recovery time (τ rec = 20 s). Additionally, sensors based on Bi 2 MoO 6 NSs and LaFeO 3 NFs were also respectively fabricated to measure HCHO gas sensing performances in order to elucidate the sensing mechanism and structural superiority of the Bi 2 MoO 6 /LaFeO 3 hierarchical nanostructure. The increased capability of detecting HCHO gas can be attributed to the n-p heterostructure formed within the Bi 2 MoO 6 /LaFeO 3 hierarchical nanostructure. The findings in this work can contribute to the realization to enhance the sensing performances by designing n-p heterostructure in gas sensing material.
研究领域:
材料科学
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传感器技术
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纳米技术
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DOI
高影响因子
Catalysis Science & Technology
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2024
·Vol. 14
·期 22
·6621-6640
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IF 4.4
Bin Guan,Junyan Chen,Zhongqi Zhuang,Zhan Gao,Zeren Ma,Xuehan Hu,Chenyu Zhu,Sikai Zhao,Kaiyou Shu,Hongtao Dang,Tiankui Zhu,Zhen Huang
As a promising future energy material, g-C3N4 as a CO2 photo-thermal-reduction catalyst can effectively convert CO2 to renewable fuel, but the low yield and low product selectivity significantly limit its further development and application. Herein, Ag and Bi2MoO6 were loaded separately or together on g-C3N4 catalysts by photo-deposition and solvothermal synthesis methods, wherein the conversion efficiency of the g-C3N4 catalyst co-loaded with 0.5% Ag and 10% Bi2MoO6 was the highest (CO yield = 50.77 μmol g−1 h−1, CO selectivity = 96.98%). Characterization shows that the co-loading of Ag and Bi2MoO6 reduces the band gap of g-C3N4, improves the light absorption performance, and promotes the photoelectron transfer and CO2 adsorption, which may be attributed to the LSPR of Ag and the Z-scheme heterojunction between g-C3N4 and Bi2MoO6. The results of in situ DRIFTS and DFT calculations are consistent with the above conclusion and show that Ag loading effectively reduces the energy barrier of each intermediate state. This thesis aims to provide data support and theoretical guidance for optimal design of g-C3N4 catalysts.
研究领域:
材料科学
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催化化学
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能源科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Rui Zhang,Maoqin Xu,Junrong Yu,Ziyin Chen,Jiacheng Jiang,Jie He,Jingjing Hao
Water pollution has reached alarming levels due to the overuse of antibiotics, and photocatalysis is considered to be a green and efficient degradation technology for the treatment of water pollution caused by antibiotics. In this paper, a series of p-n heterojunction Bi 2 MoO 6 /Cu 2 O composite photocatalysts were synthesized by hydrothermal method . The samples were characterized by XRD, SEM, XPS, UV–Vis-DRS, PL , and EIS . The photocatalytic activities of the photocatalysts were analyzed based on the degradation of two antibiotics under visible light illumination. Results showed a removal rate of 88% and 94% for chlortetracycline (CTC) and tetracycline (TC), respectively. The corresponding first-order kinetic curves indicated that the reaction rates were 4.2 and 7.9 times higher than those of the Bi 2 MoO 6 and Cu 2 O monomers . The enhanced removal efficiency of antibiotics is ascribed to the improved light absorption and electron-hole pair transport channels, facilitated by the formation of p-n heterojunction within the catalyst. Further, a possible degradation mechanism was proposed. Finally, the intermediate products were analyzed using liquid chromatography-mass spectrometry (LC-MS), and a possible photocatalytic degradation pathway of CTC was proposed. Based on the present study and experimental observations, Bi 2 MoO 6 /Cu 2 O as a visible-light-driven photocatalyst is suggested to be a promising candidate for the removal of antibiotics.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Fuzheng Fu,Furui Hu,Zi Yu,Yongxin Liang,Tao Gan,Huayu Hu,Zuqiang Huang,Yanjuan Zhang
The existing photocatalytic systems are difficult to achieve high selectivity and conversion for the oxidation of 5-hydroxymethylfurfural (HMF) under mild conditions. MnO 2 exhibits notable tunability in valence state, but its photocatalytic oxidation efficiency is limited by the poor absorption in near-infrared region, insufficient oxygen adsorption, and slow charge transfer. To overcome these limitations, an innovative MnO 2 @Bi 2 MoO 6 /kaolinite (MnO 2 @BMO/KL) composite photocatalyst was synthesized by the hydrothermal and co-precipitation techniques, and the as-prepared photocatalyst was used for selective photocatalytic oxidation of HMF to produce 2,5-diformylfuran (DFF). The combination of MnO 2 , three-dimensional layered Bi 2 MoO 6 (BMO), and kaolinite enhanced electron transport and oxygen adsorption. The incorporation of kaolinite as a support material led to the structural transformation of BMO, while the in-situ grown amorphous MnO 2 trapped and accelerated electron transfer to adsorbed O 2 , thus efficiently segregating the photo-generated charges to enhance the utilization rate. MnO 2 @BMO/KL achieved almost complete conversion of HMF (>99.0 %) and a DFF yield of 83.0 % after 6 h of visible light irradiation. Additionally, MnO 2 @BMO/KL exhibited excellent structural stability over 6 cycles. The synergistic action of singlet oxygen ( 1 O 2 ) and superoxide ( • O 2 − ) was crucial in promoting the selective oxidation of HMF, while minimal generation of hydroxyl radical (•OH) reduced the risk of overoxidation. This study provides new insights into the development of economical and stable non-precious metal photocatalysts for highly selective conversion of biomass-derived chemicals.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Dekun Shi,Zhaojun Shi,Lixin Zhang,Yaan Cao
A series of halogen ions (Cl − , Br − , or I − ) modified Bi 2 MoO 6 (Bi 2 MoO 6 –Cl, Bi 2 MoO 6 –Br, or Bi 2 MoO 6 –I) are synthesized via a one-step solvothermal method . It is determined that the halogen ions (Cl − , Br − , or I − ) are modified on the surface of Bi 2 MoO 6 as the -Bi-Cl, -Bi-Br, or -Bi-I species (the connected Bi 3+ is coordinated with three lattice O2- ions in Bi 2 MoO 6 ). The -Bi-Cl, -Bi-Br, or -Bi-I species on the Bi 2 MoO 6 surface can act as highly active sites to polarize and activate the N 2 and H 2 O molecules adsorbed on the surface of catalysts. Moreover, due to the surface-modified -Bi-Cl, -Bi-Br, or -Bi-I species, the visible light absorption is improved, the separation of photogenerated charge carriers is promoted, as well the band structure is better matched with the redox potential of photoreduction of N 2 . As a result, the photocatalytic activity of Bi 2 MoO 6 –Cl, Bi 2 MoO 6 –Br, or Bi 2 MoO 6 –I is improved for photoreduction of N 2 into NH 3 compared with Bi 2 MoO 6 . Overall, this work provides new insights into the doping states of halogen ions, the surface-active sites, the band structure, the photocatalytic activity, and the mechanism for photoreduction of N 2 into NH 3 for Bi 2 MoO 6 with modification of halogen ions (Cl − , Br − , or I − ).
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Catalysis Science & Technology
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2014
·Vol. 4
·期 4
·1028-1037
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IF 4.76
Haiping Li,Quanhua Deng,Jingyi Liu,Wanguo Hou,Na Du,Renjie Zhang,Xutang Tao
Bi2MoO6/Zn–Al layered double hydroxide (LDH) hierarchical heterostructures assembled from Bi2MoO6 hierarchical hollow spheres and Zn–Al LDH nanosheets were synthesized by a low-temperature hydrothermal method. X-ray diffraction, Fourier transform-infrared spectroscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy (XPS) confirmed the formation of the Bi2MoO6/Zn–Al LDH composites. Morphologies were characterized by scanning electron microscopy and transmission electron microscopy (TEM). XPS and high resolution TEM indicated the formation of a Bi2MoO6/Zn–Al LDH heterojunction. Increasing the LDH content from 0 to 27.0 wt.% caused the Brunauer–Emmett–Teller (BET) specific surface area of the composites to gradually increase. The photocatalytic degradation activity for Rhodamine B (RhB) under visible light irradiation exhibited a large enhancement, followed by a decrease, with increasing LDH content. The Bi2MoO6/Zn–Al LDH heterostructure composite with LDH content of 5.5 wt.% showed the highest photocatalytic activity and degraded 99% of RhB in 80 min, while Bi2MoO6 degraded less than 50%. The average photocatalytic efficiency is enhanced by more than 100%. The enhanced photocatalytic activity of the Bi2MoO6/Zn–Al LDH heterostructure photocatalyst was mainly attributed to the efficient separation of photoinduced electrons and holes. Superoxide radicals and holes were the major active species. The Bi2MoO6/Zn–Al LDH heterostructure photocatalyst exhibited excellent stability and reusability. A detailed mechanism for its enhanced photocatalytic activity was discussed in this study. This work provides an effective way to fabricate a series of Bi-based and LDH-containing heterostructure photocatalysts.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 87
·84485-84492
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IF 3.289
Yan Lu,Xiaoxuan Li,Changcun Han,Lei Ge,Siman Fang,Ping Qiu
A novel PtCo/Bi2MoO6 composite photocatalyst was successfully synthesized by loading PtCo alloy nanoparticles via a simple polyol reduction method. The as-prepared PtCo/Bi2MoO6 composite exhibits an enhanced photocatalytic performance for the degradation of RhB under visible-light irradiation. Among various PtCo/Bi2MoO6 composites with different contents of PtCo, the 1 wt% PtCo–Bi2MoO6 sample shows the highest photocatalytic activity and its degradation constant is 5 times higher than that of pure Bi2MoO6. Through photocatalytic experiments, the fabricated PtCo/Bi2MoO6 composite demonstrated that it can efficiently promote the separation efficiency. X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) results confirm the composition of the PtCo alloy in the composite catalysts. TOC measurement also suggests that RhB is easily mineralized. SPS measurements illustrate that the high activity of PtCo–Bi2MoO6 could be attributed to its better ability to grab photoexcited electrons compared with Pt–Bi2MoO6. Based on experimental results, we propose a possible photocatalytic mechanism of PtCo–Bi2MoO6, which may provide a theoretical basis for future research.
研究领域:
材料科学
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光催化化学
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环境功能材料
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纳米材料
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表面科学
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能源与环境技术
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DOI
高影响因子
Frontiers in Chemistry
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2022
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IF 5.545
Xiao Hui-Jin,Liao Xiao-Jing,Wang Hui,Ren Shu-Wei,Cao Jun-Tao,Liu Yan-Ming
A novel signal-increased photoelectrochemical (PEC) biosensor for l-cysteine (L-Cys) was proposed based on the Bi2MoO6–Bi2S3 heterostructure formed in situ on the indium–tin oxide (ITO) electrode. To fabricate the PEC biosensor, Bi2MoO6 nanoparticles were prepared by a hydrothermal method and coated on a bare ITO electrode. When L-Cys existed, Bi2S3 was formed in situ on the interface of the Bi2MoO6/ITO electrode by a chemical displacement reaction. Under the visible light irradiation, the Bi2MoO6–Bi2S3/ITO electrode exhibited evident enhancement in photocurrent response compared with the Bi2MoO6/ITO electrode, owing to the signal-increased sensing system and the excellent property of the formed Bi2MoO6–Bi2S3 heterostructure such as the widened light absorption range and efficient separation of photo-induced electron–hole pairs. Under the optimal conditions, the sensor for L-Cys detection has a linear range from 5.0 × 10−11 to 1.0 × 10−4 mol L−1 and a detection limit of 5.0 × 10−12 mol L−1. The recoveries ranging from 90.0% to 110.0% for determining L-Cys in human serum samples validated the applicability of the biosensor. This strategy not only provides a method for L-Cys detection but also broadens the application of the PEC bioanalysis based on in situ formation of photoactive materials.
研究领域:
生物传感技术
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材料科学与工程
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DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2017
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IF 7.78
Lingnan Wang,Zhenbang Liu,Dandan Wang,Shuang Ni,Dongxue Han,Wei Wang,Li Niu
Along with continuous growing widespread adulterations of botanical drugs, the necessity for drug quality monitoring has become more popular than ever. Considering that antioxidants are widely found in natural plant pharmaceuticals, gallic acid (GA) is often regarded as the reference standard to make sure whether these are up to grade as guided by Chinese Pharmacopeia. Herein, a novel Bi 2 MoO 6 /Bi 2 S 3 photoelectrochemical sensor has been successfully involved toward selective GA analysis to supervise drug quality, in which γ-Bi 2 MoO 6 nanobelts were treated as template nanocrystal and scaffold. Such Bi 2 S 3 accommodated in Bi 2 MoO 6 nanobelts render platform with excellent light-harvesting capability, selectivity and reproducibility. Concerned mechanism was in-depth pursued through theoretical computation and morphology speculation, inferring that two aspects mainly contribute to the findings: (1) engineering particular structure brings about surface dangling bonds , which raises the likelihood of electrostatic interaction with opposite charges; (2) appending Bi 2 S 3 to the Bi 2 MoO 6 nanobelts acted as a new avenue to mediate photoelectrochemical behavior, nearly devoid of interference effect. Our work opens up broad possibilities for finely distinguishing different antioxidants. As the extension of this simple and valid strategy, photoelectrochemistry will become a potent backing for quality guaranty in drug field, which offers an entry into ensuring good consistency in batch production .
研究领域:
材料科学
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分析化学
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药学
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DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2018
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IF 2.891
Hongjing Zhen,Muhammad Asim Khan,Mingzhu Xia,Wu Lei,Fengyun Wang
In this article, Bi 2 O 3 /Bi 2 MoO 6 composites were synthesized hydrothermally under optimized conditions, by adjusting pH, the concentration of polyvinylpyrrolidone (PVP (K30)) and reaction time. During the synthesis process, flower-root shaped zero-gap Bi 2 O 3 /Bi 2 MoO 6 heterojunctions were successfully synthesized. The adopted samples were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Energy spectrometer (EDS), X-ray photoelectron spectroscopy (XPS), Diffuse reflectance spectra (DRS), Photoluminescence (PL), and Fourier transform infrared spectroscopy (FT-IR). The photocatalytic activity was measured under visible-light-irradiation (λ > 420 nm) by degrading tetracycline (TC), ciprofloxacin (CPFX) (antibiotics) and rhodamine B (RhB), methylene blue (MB) (dangerous dyes). The degradation results indicated that photocatalyst sample synthesized at pH 9.0, PVP (K30) 0.05 mol/L and 80 min reaction time (Sup-Bi 2 O 3 /Bi 2 MoO 6 ) demonstrated highly efficient performance. The Sup-Bi 2 O 3 /Bi 2 MoO 6 showed the highest apparent rate constant (K app ) that’s 50% more than the samples prepared at ordinary conditions. Photocatalytic degradation order was i.e. RhB > TC > CPFX > MB, which depends on the polarity of the degrading medium.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2023
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IF 3.8
Liang Wei,Shuqi Chen,Xiande Yang,Hongxi Zhang,Zimei Mo,Jing Yang,Haibo Wang
Aflatoxin B1 (AFB1) is a dangerous toxin found in food and feed, it is of great significance to find a photocatalyst for the efficient degradation of AFB1. Bismuth molybdate (Bi 2 MoO 6 ) photocatalyst has advantages of good visible light response, low cost, and non-toxicity. In this study, the solvent composition polarity and different temperatures were discussed on the surface nano-sheets aggregation, crystal size, and crystal defect of Bi 2 MoO 6 . The photocatalytic performance of Bi 2 MoO 6 was investigated towards AFB1 degradation under visible light. The results showed that sample BMO(3:7)-160 prepared under a volume ratio of 3:7 about ethylene glycol to ethanol and 160℃ was spherical structure composed of nanosheets, which had a good photocatalytic degradation efficiency and photocatalytic stability on AFB1. After 120 min, the degradation rate of AFB1 can reach 99.8 %, which was attributed to the best electron-hole separation efficiency of BMO(3:7)-160. In addition, h + was identified as the primary active species. The degradation products of AFB1 were analyzed to deduce the pathway of AFB1 decomposition and the possible photocatalytic mechanism.
研究领域:
环境科学
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材料科学
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食品安全
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2018
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IF 3.849
Junlei Zhang,Zhen Ma
Novel Ag-Ag 2 CO 3 /Bi 2 MoO 6 composites were obtained through in situ formation of Ag 2 CO 3 rods/nanoparticles onto Bi 2 MoO 6 nanosheets, followed by photoreduction. These composites were found to be much more active than Bi 2 MoO 6 in photocatalytic degradation of rhodamine B (RhB) under visible-light irradiation. In particular, an Ag-Ag 2 CO 3 /Bi 2 MoO 6 composite with a theoretical Ag 2 CO 3 /Bi 2 MoO 6 mass ratio of ∼27.5% exhibited the highest photocatalytic activity. It was also the most active in photocatalytic degradation of methyl blue (MB) and tetracycline hydrochloride (TC), due to the enhanced visible-light absorption and efficient separation of photogenerated carriers. The good reusability of Ag-Ag 2 CO 3 /Bi 2 MoO 6 was verified by cycling degradation experiments. The dominant active species were found to be photogenerated holes (h + ). A possible photocatalytic mechanism was proposed.
研究领域:
材料科学
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环境科学
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光催化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）