SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Yuting Wang,Xiaoqiong Fu,Tianqi Wang,Feng Li,Dan Li,Ying Yang,Xiangting Dong
In this work, a Cu 2 ZnSnS 4 (CZTS)-based gas sensor incorporated by polyoxometalate(POMs) electron acceptor were synthesized by hydrothermal method . For the first time we investigated on the application of CZTS in NO 2 sensor and the influence of POMs incorporating on gas sensing performances of CZTS sensor. As a result, the gas sensing response could be remarkably improved to 6.12 times by incorporating POMs compared with pure CZTS. This is mainly attributed to introducing POMs into CZTS could reduce electron-hole recombination and facilitate electrons transfer. The research results exhibit the highest gas sensing response of CZTS-based gas sensor up to now. This research reveals a new idea for developing high-performance gas sensors based on CZTS by introducing POMs.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Xiwen Xu,Ying Yang,Wenyuan Pei,Dan Li,Hui Yu,Xiangting Dong,Tianqi Wang
As a classical rare earth oxide, cerium dioxide (CeO 2 ) has played an important role in the realm of gas detection. Nonetheless, pure CeO 2 as a gas sensor material is challenged by a wide band gap, rapid carrier recombination, and high operating temperature, which affects its efficacy. Constructing heterogeneous composite materials is an effective method to remedy this issue. Herein, we introduced polyoxometalate (POMs, cluster formations of rare metal oxides.) electron acceptor into CeO 2 gas sensor for the first time to investigate the effect of POMs on gas sensitive properties. As a result, the CeO 2 /PW 12 gas sensor responds quickly and recovers promptly, showing a value of 8.41 to 100 ppm of toluene gas, which is much higher compared to pure CeO 2 sensor (3.05). And then CeO 2 /PW 12 sensor response recovery time of 6 s/71 s. Selectivity, repeatability, long-term stability and humidity resistance were also comprehensively explored. The results show that the sensor has the highest response value at 1 % PW 12 content. And the sensor showed good long-term stability and humidity resistance. The sensor has a minimum detection limit of 77.434 ppb for toluene. The improved sensing capabilities are a result of the incorporation of PW 12 . It serves as a shallow electron trap, capturing electrons within the conduction band of CeO 2 , thus the electron-hole pairs could be effectively separated. In that way the gas sensing performances of CeO 2 sensor were successfully improved. The research presented in this article outlines a novel approach to creating highly sensitive gas sensors utilizing CeO 2 , offering valuable insights into the utility of polyoxometalates in gas detection applications.
研究领域:
材料科学
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传感器技术
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环境监测
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产品关联
DOI
高影响因子
CELLULOSE
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2025
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IF 4.8
Yao Yiqing,Cheng Haibing,Han Juan,Wang Haifeng,Liang Zhijie
The development of cotton fabrics with exceptional and durable fluorescent properties has garnered significant attention. In this study, an enduring fluorescence cotton fabric was fabricated by a convenient and efficient approach. Interestingly, carboxyl reactive groups were employed as bridging agents to covalently link the raw fabric with Europium (Eu)-based polyoxometalate, thus guaranteeing the tight bonds between the polyoxometalates and the fabric matrix. The morphology and microstructures of composite fabrics were characterized and compared, demonstrating the successful integration of polyoxometalates into the fabric featuring covalent bonding interactions. Additionally, the fluorescence emissions of composite fabrics were investigated ( λ ex = 243 nm). The emission spectrum exhibits typical emission peaks of Eu 3+ and polyoxometalate, corresponding to the 5 D 0 → 7 F 0–4 transitions in the range of 550–750 nm and the O → W transition, which results in distinct red fluorescence. Moreover, the lifetime-decay behavior, monitored at an excitation wavelength of 243 nm, follows a single-exponential function, yielding a lifetime ( τ ) of 0.4 ms. More importantly, owing to the robust interaction between the components, the composite fabric demonstrates exceptional fastness properties, including resistance to washing (50 times washing), abrasion (under both dry and wet conditions), and sunlight (9 days). In particular, three kinds of shaped masks were used, highlighting its potential as a reusable anti-counterfeiting material. The plausible mechanisms of the system is attributed to the efficient electron transition and energy transfer processes within the composite structure. Besides, mechanical property reveal PW 11 Eu@CF almost inherits the original fabric’s mechanical property. This work provides a novel strategy for the controlled design and fabrication of polyoxometalate-based anti-counterfeit material.
研究领域:
材料科学
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纺织工程
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光学材料
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DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 44
·17948-17955
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IF 4.177
Farooq Khurum Shehzad,Ningning Qu,Yunshan Zhou,Lijuan Zhang,Huanyao Ji,Zonghai Shi,Jiaqi Li,Sadaf ul Hassan
Composite films with the general formula (POM/CuTAPc)n derived from water-soluble Keggin-type polyoxometalates (POMs = H5PMo10V2O40, H4SiW12O40, H3PMo12O40 and H3PW12O40) and water-insoluble 4,9,16,23-copper tetraaminophthalocyanine (denoted CuTAPc) are successfully fabricated by a layer-by-layer self-assembly technique and systematically characterized. The structure of the polyoxometalate anions in the multilayers is kept intact; the deposition amounts of POM and CuTAPc remain constant in every adsorption cycle of the composite film assembly process. The nonlinear optical properties of the composite films were studied by a Z-scan technique at a wavelength of 532 nm and a pulse width of 7 ns. The results not only show that the composite films exhibit notable optical nonlinear self-defocusing behavior and a saturated absorption effect with the nonlinear optical absorption co-efficient β, refractive index n2, and third-order NLO susceptibility χ(3) of the films increasing with the increase in number of layers of the films, but also reveal importantly that the discrepancy of LUMO levels between CuTAPc and POMs is proportional to their third-order NLO response.
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Cui Li-Ping,Zhang Shu,Zhao Yue,Ge Xin-Yue,Yang Le,Li Ke,Feng Liu-Bin,Li Ren-Gui,Chen Jia-Jia
It remains a great challenge to explore redox mediators with multi-electron, suitable redox potential, and stable pH buffer ability to simulate the natural solar-to-fuel process. In this work, we present a defect engineering strategy to design soluble multi-electron redox polyoxometalates mediators to construct a photocatalysis-electrolysis relay system to decouple H 2 and O 2 evolution in solar-driven water splitting. The appropriate use of vanadium atoms to replace tungsten in the Dawson-type phosphotungstate successfully regulated the redox properties of the molecular clusters. Specifically, the single vanadium substitution structure ({P 2 W 17 V}) possesses 1-electron redox active and sequential proton-electron transfer behavior, while the tri-vanadium substituted cluster ({P 2 W 15 V 3 }) exhibits 3-electron redox active and cooperative proton electron transfer behavior. Based on the developed multi-electronic redox mediator with pH buffering capacity, suitable redox potential (0.6 V), and fast electron exchange rate, we build a photocatalysis-electrolysis relay water splitting system. This system allows for high capacity of solar energy storage through photocatalytic O 2 evolution using BiVO 4 photocatalyst and stable H 2 production with a high Faraday efficiency of over 98.5% in the electrolysis subsystem.
研究领域:
化学
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能源科学
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材料科学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 16
·6251-6260
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IF 3.288
Chaowei Wang,Zhe Liu,Ruimin Gao,Jinhua Liu,Siying An,Ronglan Zhang,Jianshe Zhao
Novel composite materials of vanadium-substituted Keggin-type polyoxometalates anchored on amine-functionalized Ce-MCM-41 (POM/APTES-CeM) are successfully synthesized and fully characterized by FT-IR, XRD, N2 adsorption–desorption isotherms, SEM, TEM, EDX, and XPS. The catalytic activities of these new catalysts are evaluated for the oxidative desulfurization of the model fuel with molecular oxygen as an oxidant. Meanwhile, the optimal reaction conditions are investigated, including the loading amount of POM, catalyst mass, reaction temperature, agitation rate and the amount of oxygen. This result shows that PW9V3/APTES-CeM-50 exhibits the highest catalytic activity with a desulfurization performance of 99.26% as well as brilliant reusability and catalytic efficiency with slight diminution after being used consecutively eight times. Moreover, the kinetic study displays that the oxidative desulfurization process conforms to the pseudo-first-order model.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
·
IF 5.091
Liang Zeng,Ling Xiao,Yangke Long,Xiaowen Shi
In this study, POM@UiO-66 nanoparticles were fabricated by encapsulation of POM (K 6 P 2 W 18 O 62 polyoxometalate) into mesoporous UiO-66 metal organic framework through a solvothermal method with trichloroacetic acid as a modulator to promote the defects formation of UiO-66. The as-prepared samples were characterized by TEM , SEM, PXRD , TG, XPS , and EDX elemental mapping, and the successful combination of POM and UiO-66 was confirmed. Two cationic dyes, rhodamine B and malachite green , and one anionic dye orange G were employed to investigate the adsorption performance of POM@UiO-66. The adsorption data showed that the removal process of cationic dyes by POM@UiO-66 matched well with the pseudo-second-order model and Langmuir isothermal model. The resulting POM@UiO-66 nanoparticles exhibited high adsorption to cationic dyes but low adsorption to anionic dyes, and the adsorption capacities of rhodamine B, malachite green, and anionic dye orange G were 222.6, 190.6 and 40 mg g −1 , respectively. Furthermore, the cationic dyes could be selectively removed from a cationic-anionic dye binary system. These results suggested that the novel polyoxometalate-based UiO-66 material is a promising candidate for the adsorption of cationic dyes from effluent.
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
PubMed
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Yulin Zhang,Guozhao Ji,Fahim Ullah,Aimin Li
The properties of tire pyrolysis oil are similar to diesel oil, but the high sulfur content in the pyrolysis oil limits its use in diesel engines . In this work, taking the boiling point range of traditional diesel oil as the cutting temperature, a fraction in the temperature range of 190–350 °C was obtained by distillation of tire pyrolysis oil (TPO 190–350 °C ). The sulfides in TPO 190–350 °C are mainly benzothiophene derivatives. And a simple and effective POM-based catalyst ([C 16 H 33 N(CH 3 ) 3 ] 3 PW 4 O 24 ) has been used in the oxidation desulfurization process for the removal of sulfur compounds from the oil. The catalyst played the role of transferring reactive oxygen species atoms on H 2 O 2 to sulfur compounds . The benzothiophene , dibenzothiophene , and 4,6-dimethyl-dibenzothiophene (500 ppm S) in model oil could be converted to the corresponding sulfone within 1 h at 40 °C. Even if the sulfur content was increased to 2000 ppm, the catalyst exhibited well catalytic performance under the same conditions. The catalyst could be recycled and reused with no loss of desulfurization efficiency. Distillation could effectively reduce the presence of olefins in the oil leading to reduce oxidation performance during the oxidation desulfurization process (ODS). In the subsequent desulfurization experiments of TPO 190–350 °C , a high desulfurization efficiency (91.28%) was achieved for TPO 190–350 °C , with initial sulfur contents of 11033 ppm declining to 961 ppm.
研究领域:
化学工程
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环境科学
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能源技术
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 24
·期 39
·9976-9982
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IF 5.16
Dan-Dan Zhou,Qing Zhao,Fu-Ping Zhu,Zhi-Gang Zhang,Yang Zhou,Zi-Jun Yong,Ju-Ping Ma,Yoshihiro Kuroiwa,Chikako Moriyoshi,Yong-Zheng Fang,Jia-Li Gu,Jie Shu,Zhi-Yong Li,Jian-Mei Chen,Li-Rong Zheng,Hong-Tao Sun
Graphical Benefit from micropores : The ion-exchange strategy is exploited as a unique approach to prepare POM-based luminescent materials by using a microporous POM compound as a versatile host (see figure). The introduced bismuth ions, with an unconventional coordination geometry, selectively occupy an off-center site in the framework, leading to unusual luminescence unattainable by other means. The synthesis of luminescent polyoxometalates (POMs) typically relies on the assembly of POM ligands with rare earth or transition metals, placing significant constraints on the composition, structure, and hence the luminescence properties of the resultant systems. Herein, we show that the ion-exchange strategy can be used for the synthesis of novel POM-based luminescent materials. We demonstrate that introducing bismuth ions into an ion-exchangeable, microporous POM compound yields an unconventional system luminescing in the near-infrared region. Experimental characterization, coupled with quantum chemical calculations, confirms that bismuth ions site-specifically occupy an off-center site in the lattice, and have an asymmetric coordination geometry unattainable by other means, thus giving rise to peculiar emission. Our findings offer an effective strategy for the synthesis of POM-based luminescent materials, and the design concept may potentially be adapted to the creation of POM-based systems with other functionalities.
研究领域:
化学
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材料科学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 22
·10777-10786
·
IF 3.925
Xiaoxia Yu,Jianye Pei,Lihua Bi
To develop an excellent electrochemical sensor for the detection of 2,4-dinitrophenylhydrazine (2,4-DNPH), which has become a primary organic pollutant in the environment and is greatly poisonous, four polyoxometalates (POMs) with different structures (H3PW12O40: PW12, K6P2W18O62: P2W18, K12.5Nal.5[NaP5W30O110]·15H2O: P5W30, K28Li5H7P8W48·92H2O: P8W48) were chosen to investigate their sensing performance in solution and composite films towards the detection of 2,4-DNPH. The results indicated that the composite film containing P8W48 exhibited the best performance among the four POMs. The study focused on the effect of the layer number and solution pH on the sensing performance of the composite film containing P8W48, proving that the composite film with seven layers of P8W48 in pH 7 solution showed the optimal electrocatalytic activity for the reduction of 2,4-DNPH. Further, under the optimized conditions, the sensing performance of the P8W48-based composite film was evaluated by CV and i–t curves, giving a linear concentration range of 1 to 700 μM with a low detection limit of 0.012 μM. Moreover, the selectivity, stability, reproducibility and repeatability were examined, confirming that the developed sensor has good potential for determining 2,4-DNPH in the environment.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Meng Zhang,Xintong Lv,Tianqi Wang,Wenyuan Pei,Ying Yang,Feng Li,Duanduan Yin,Hui Yu,Xiangting Dong
In this paper, polyoxometalates (POMs) electron acceptors were introduced into a classical p-type gas sensitive ceramic-copper oxide (CuO). Then, we investigated the effect of phosphomolybdic acid (PMA) on the sensing performance of CuO gas sensors. The results show that by introducing PMA, the response of CuO gas sensor to 100 ppm ethanol gas can be effectively improved to 2.78. This promotion may be due to the electron trapping effect of PMA, which promotes the carrier migration and inhibits its recombination. Simultaneously, the response and recovery time of the sensor is only 5 s and 4 s. Other gas sensing parameters of the sensors were also comprehensively investigated. The mechanism analysis shows that PMA, as an electron-transport mediator, can trap electrons in the conduction band of CuO, generate shallow electron traps, and effectively inhibit the recombination of electrons and holes in CuO, thereby enhancing gas sensing performance. This work provides a new idea for the advance of CuO-based gas sensors with enhanced sensing sensitivity using polyoxometalates as electron acceptors .
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Qina Sun,Mengzhou Wang,Yujia Yang,Jinshan Song,Junfeng Li,Qingrui Zhang
Commonly used polyoxometalate (POM) adsorbents exhibit high cesium (Cs) adsorption capacity. However, its impotent ability to sequester adsorbates poses a risk of Cs migration in radioactive waste decontamination and disposal. By leveraging the cesium affinity of POMs and the regulatory properties of ionic liquids (ILs), POM-IL composites hold promise for mitigating the risk of cesium migration through efficient adsorption and retention. Herein, we designed two POM-ILs composed of the phosphotungstate anion (PW) and tetrabutylammonium cation (TBA), i.e., the {WO 6 }-saturated TBA-PW 12 and mono-lacunary TBA-PW 11 , for the capture and retention of aqueous Cs. The composites were then characterized, and the performance and mechanism of Cs uptake were investigated. TBA-PW 12 exhibited ∼300 nm aggregate of particles around 20–60 nm. TBA-PW 12 retained the Keggin structural features of PW 12 O 40 3− , which was proven essential for the binding of Cs + . With a retention efficiency of 97.3% in an NH 4 Cl eluent and a maximum adsorption capacity of 400.9 mg/g at 338 K, TBA-PW 12 exhibited superior Cs capture and retention compared to the POM-IL derived from common Cs adsorbent phosphomolybdate. The Cs adsorption onto TBA-PWs achieved equilibrium within 180 min. Cs uptake by TBA-PWs was monolayer chemisorption of Cs + accompanied by H + release, and the removal efficiencies stabilized around initial pH 5–10. Due to intense affinity between {WO 6 } and Cs + , TBA-PW 12 efficiently sequestered Cs + through {WO 6 } octahedra so that the {WO 6 }-saturated TBA-PW 12 presented better Cs uptake performance than the mono-lacunary TBA-PW 11 . The IL anion [N(C 4 H 9 ) 4 ] + provided a composite-water biphasic interface for aqueous Cs adsorption, while retaining the ability of POM cation PW 12 O 40 3− to form a stable structure with Cs via its affinity to {WO 6 } octahedra. These findings support the design of POM-IL composites as efficient adsorbents for capturing and retaining Cs, aiding in the decontamination and safe disposal of radioactive waste, thereby minimizing the risk of nuclide leakage into the environment.
研究领域:
环境科学
·
材料科学
·
放射性废物管理
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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）