JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 17
·21858-21868
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IF 2.478
Wang Jinmao,Yan Hong,Long Yumei,Li Weifeng
In this work, a series of h -BN/ α -SnWO 4 (BN/SW) nanocomposites with different h -BN concentrations (0.3–1.0 wt%) were prepared through a hydrothermal method. The composition, structure and morphology of BN/SW nanocomposites were systematically investigated. The formation of BN/SW heterojunction was evidenced by Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM). The BN/SW composites showed plate-to-plate structure consisting α -SnWO 4 and h -BN nanoplates. The optical and photoelectrochemical studies revealed that the decorating of h -BN can significantly facilitate the separation of the photo-created charge carries due to the formation of heterostructure. As a result, BN/SW hetero-structure exhibited the superior photocatalytic performance under visible light, which was confirmed by the photo-degradation of methyl orange (MO) and tetracycline (TC). Especially, the BN/SW-0.5 sample has the best rate constant of 0.0323 min −1 , which is 4.6 times larger than that of α -SnWO 4 . Based on trapping experiment, the h + radical was identified as the dominant reactive species, and ·O 2 − and ·OH also made contribution to the photocatalysis. In addition, the photocatalytic enhancement mechanism of BN/SW heterojunction was proposed. This study shed light on the roles of h -BN in the design of photocatalysts with high-performance.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Nina Ma,Shuyi Ma,Gege Fan,Ping Ni,Jiayun Guo,Wei Ma
The accurate detection of hazardous gases and monitoring of ambient temperature are crucial for preserving the ecological environment, safeguarding human health, and fostering industrial advancement. In this research, a straightforward hydrothermal technique was employed to synthesize the heterogeneous nanocomposite structure of CsPbBr 3 /SnWO 4 , which facilitates the detection of ethanolamine gas at room temperature. The synthesized CsPbBr 3 /SnWO 4 heterostructures underwent further analysis using XRD , SEM , HRTEM , XPS , BET and Mott-Schottky techniques. The findings revealed that the CsPbBr 3 /SnWO 4 heterostructure exhibits a coarse cubic morphology, consisting of nano-cubic CsPbBr 3 and nano-sheet SnWO 4 . Additionally, the integration of CsPbBr 3 markedly enhances the specific surface area of the pristine SnWO 4 nanosheets. Due to its coarse surface, expansive contact area, and n-n heterojunction, CsPbBr 3 –SnWO 4 demonstrates remarkable selectivity, superior long-term stability, and a sensitivity of 45.6 to ethanolamine at ambient temperature. In conclusion, the CsPbBr 3 /SnWO 4 heterostructure, constructed from a cube with a rough surface, is anticipated to serve as an effective room temperature sensor with heightened selectivity for ethanolamine.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Advanced Energy and Sustainability Research
·
2021
·Vol. 3
·期 1
·2100146
·
IF 0
Deyu Liu,Xiuyu Chen,Yuepeng Qiao,Yang Zhou,Yongbo Kuang
Oxide-based photoelectrodes for solar water splitting have gained growing attention because of their decent stability and cost-effectiveness. Particularly, α-SnWO 4 has been regarded as a potential next-generation light absorbing material due to the predicted favorable bandgap of 1.9 eV. Herein, the investigation and amelioration of the crystallinity as a performance dominating factor to the α-SnWO 4 -based photoanode are demonstrated. The improvement is attributed to a unique crystallization process induced by the formation of oxygen vacancies in the reductive atmosphere at 500 °C. The sample exhibits notably enhanced visible-light absorption and an improved charge transport property. Electrochemical measurements reveal a cathodic shift of the flat-band potential, corresponding to the impacted band position. The photocurrent is enhanced from 0.03 to 0.42 mA cm −2 (AM1.5, 1.23 V RHE ). Such a new treatment can be used as an effective tool for developing α-SnWO 4 into efficient photoelectrocatalytic (PEC) materials.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
Surfaces and Interfaces
·
2025
·
IF 6.3
NiNa Ma,ShuYi Ma,JiaYun Guo,GeGe Fan,Ping Ni,YinYue Wang,JiaMin Zhu,Heng Wang
In this study, we engineered a triethylamine sensor that operates at low temperatures and is distinguished by its exceptional selectivity. The experiments specifically entailed synthesizing WO 3 nanostructured composites and SnWO 4 nanorod model materials through a direct hydrothermal approach. The superiority of composite samples over pure ones was established by evaluating their gas sensitivity through rigorous testing. Given the importance of accurately detecting trimethylamine gas in intricate environments, it is remarkable that only a limited number of sensors possess this capability. To tackle this problem, we have engineered a triethylamine sensor that exhibits strong resistance to interfering gases, delivering an outstandingly swift response time of 50 s and a recovery time of just 7 s. The composite sensor demonstrates remarkable sensitivity to 200 ppm of triethylamine gas, exhibiting a response that is 5.4 times more pronounced than that observed in the pure sample. The integration of WO3 notably decreases the optimal operating temperature of the SnWO 4 sensor from 240 °C to 130 °C, while also demonstrating a response value of 6.6 at reduced gas concentrations of 5ppm. Furthermore, the engineered gas-sensitive material demonstrates remarkable repeatability and enduring stability upon exposure to triethylamine. Further discussion delved into the gas sensing mechanism of the WO 3 /SnWO 4 gas sensor. In conclusion, this study presents a novel perspective on the sensitivity and selectivity of gas sensors, demonstrating extensive practical utility and significant application value.
研究领域:
材料科学
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传感技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2024
·Vol. 54
·期 1
·348-360
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IF 2.2
Zhou Mincong,Li Xu,Wang Qingji
Unique nanostructures contribute to optimizing gas-sensitive properties, which has been widely acknowledged in the field of gas sensing. However, the construction of nanostructures by the in situ method is still challenging. In this work, nanorod-assembled SnWO 4 was fabricated directly on interdigital electrodes by a one-step aerosol-assisted chemical vapor deposition method. The xylene gas sensor was developed, featuring low detection limits and fast response. Under the operating temperature of 350°C, the detection limit of the SnWO 4 sensor for xylene reaches a minimal level of 10 ppb. Meanwhile, the sensor exhibits excellent performance in response time, providing a rapid response of 2 s to 100 ppm xylene. Apart from this, the sensor also exhibits good selectivity. Among various volatile organic compound gases of the same 100 ppm at 350°C, the sensor’s response to xylene (484%) is 3.6 times that of toluene and 5.3 times that of benzene. The excellent gas-sensing performance is primarily due to the unique structural properties of nanorod-assembled SnWO 4 . This paper holds significant research potential in the field of gas sensing, particularly for the development of high-performance xylene sensors. Graphical
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Shuairu Zhu,Deyu Liu,Jianming Li,Yongbo Kuang
Photoelectrochemical (PEC) systems provide a cost-effective strategy to harvest solar power into green fuels and valuable chemicals. Among various candidate materials for the light-absorbing layer in PEC photoanodes, n-type α-SnWO4 is quite attractive owing to its favorable band positions and decent visible light absorption. Although thin films are the most widely reported type of PEC photoelectrodes, up to now, only very few physical deposition techniques were realized for α-SnWO4 PEC structures. Herein, we demonstrate a chemical vapor deposition (CVD) strategy for high-quality α-SnWO4 thin films for PEC applications. This route features unsophisticated instrumentation, and, more importantly, a chemical process uniformly reacting vaporized SnCl2 with a predeposited WO3 layer on substrates. Homogeneous and phase-pure thin films can be obtained with controllable thickness (260–560 nm) and excellent visible light absorption. The nanoscale film was confirmed with decent intrinsic structural durability, as confirmed by a stable PEC photocurrent output. We also tentatively demonstrated the successful surface modification of a catalytic overlayer on this nanoscale film, which is desired for the efficient extraction of charge carriers. This CVD route first demonstrates a paradigm for preparing metastable oxide thin films, which are of particular interest for PEC and other optoelectronic applications.
研究领域:
材料科学
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能源科学
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光电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xiaoyue Zhou,Yunying Liu,Yingqi Miao,Wenwen He,Yanan Pan,Adela Jing Li,Junhao Qin,Huashou Li,Renli Yin,Rongliang Qiu
Piezo-photocatalytic processes based on heterogeneous catalysts, by establishing electronic fast track to realize electronic storage and conversion, are proved to be effective ways to improve the efficiency of PMS activation. Herein, α-SnWO 4 /ZnO catalyst with p-n heterojunction was constructed to testify the piezo-photocatalytic effect on peroxymonosulfate (PMS) activation for pollution control. The decomposition rate of carbamazepine (CBZ) in the piezo-photocatalytic PMS activation process by α-SnWO 4 /ZnO heterojunction was 12.6 and 5.2 times to that by ZnO and α-SnWO 4 processes, respectively. In addition, the total organic carbon (TOC) removal rate of CBZ reached 89%, and TOC in the actual water body was also effectively removed. Free radical quenching and detection experiments showed that nonradicals ( 1 O 2 ) and free radicals (O 2 − , OH) were the mainly active species of the process, by which the toxicity of the intermediates of CBZ was significantly reduced by the combination of the radical and nonradical pathways through hydroxylation and singlet oxygen oxidation . Furthermore, the influences of the experimental factors, including the initial pH, PMS concentration, temperature and reuse of catalysts on CBZ degradation were evaluated. Notably, the activation energy (Ea) in this work was calculated as 34.2 kJ mol −1 , which was lower than that of other reported systems. Overall, this work can scientifically guide the design of high-performance piezo-photocatalysts to use common metals for efficient activation of PMS as economical alternatives over expensive rare metal catalysts for water purification.
研究领域:
环境科学
·
催化
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shihao Su,Xuyang Zou,Guojun Lv,Fuxin Wang,Yangbin Shen
Tandem catalysis reaction, which integrates two consecutive steps into a single one, can efficiently eliminate the separation of intermediate products, shortening the reaction time and decreasing energy expenditure. Therefore, the development of an efficient method for catalyzing tandem conversion of alkenes to prepare 1,2-diols is extremely fascinating. In this work, we reported the hydrothermal synthesis of tin-tungsten oxide catalysts at different pH values and their application as bifunctional catalyst for the one-pot tandem catalysis of alkenes to 1,2-diols. The SnWO 4 catalyst prepared at pH = 5 revealed the best tandem conversion performance and could attain a 95.4 % of cyclohexene conversion as well as a 77.2 % of 1,2-cyclohexanediol selectivity within 4 h of reaction. A possible mechanism corresponding to the tandem catalytic conversion of cyclohexene into 1,2-cyclohexanediol over SnWO 4 catalyst was proposed. Moreover, quenching experiments, density functional theory (DFT) calculations and in-situ infrared characterizations were further utilized to verify the reaction mechanism. Sn(II) could stabilize tungstate through the formation of W-O-Sn bonds and effectively reduced the energy of tungsten active centre binding to hydrogen peroxide, promoting the tandem catalysis reaction of cyclohexene to 1,2-cyclohexanediol. In addition, the one-pot tandem catalysis system could be further extended to the majority of linear and cyclic alkene substrates. This work can give a basis for the development of more green and efficient tandem conversion reaction of alkenes into 1,2-diols.
研究领域:
化学工程
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催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMATERIALS
·
2017
·
IF 8.402
Meng Zhang,Zhaowen Cui,Ruixue Song,Bin Lv,Zhongmin Tang,Xianfu Meng,Xiaoyan Chen,Xiangpeng Zheng,Jiawen Zhang,Zhenwei Yao,Wenbo Bu
The “partial matching” between upconversion nanoparticle (UCNP) emission and absorption by photosensitizers (PSs) often leads to a theoretically reduced therapeutic efficiency in UC-based photodynamic therapy (PDT) strategies in which the chosen PSs have limited capabilities and are unable to utilize all the near-infrared-upconverted light. In this study, needle-like SnWO 4 nanocrystals (SWs) with a broad UV–vis absorption region were synthesized to solve the problem. After covalent conjugation with UCNPs, all the UCNP-emitted light was effectively absorbed by SWs, triggering the type-I PDT process to activate ROS maxima. The unique nanostructure of the as-formed UCNP-SnWO 4 nanohybrids (USWs) also enhanced the receiving light intensities of SW, which further boosted the antitumor efficacy. Meanwhile, the strong X-ray attenuation capacity of both tungsten and tin elements qualified the USWs as excellent radio-sensitizers for radiotherapy (RT) enhancement, which played a complementary role with PDT treatment because PDT-mediated induction arrested the cells in the G0-G1 cell cycle phase, and RT was more damaging toward cells in the G2/M phase. The remarkably enhanced UC-PDT/RT efficiency of USWs was next validated in vitro and in vivo, and the combined NIR light and ionizing irradiation treatment completely suppressed tumor growth, revealing its great potential as an efficient anticancer therapeutic agent against solid tumors.
研究领域:
纳米技术
·
生物医学工程
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癌症治疗
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材料科学
·
放射学
✓ 已验证
DOI
PubMed
高影响因子
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