JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Boyi Wang,Yongli Wang,Shuqi Zheng,Shichao Liu,Juan Li,Siyi Chang,Teng An,Weilu Sun,Yuxuan Chen
Pb doped Cu 3 Sb 1-x Pb x Se 4 (x = 0, 0.01, 0.02, 0.04 and 0.06) compounds have been synthesized via microwave-assisted solvothermal method followed by SPS progress, and their thermoelectric properties from 300 K to 623 K has been explored. On one hand, Pb doping in the Sb site improved the electrical properties of Cu 3 SbSe 4 , on the other hand, the second phase PbSe formed at the high doping content (x ≥ 0.02) reduced the thermal conductivity by the phonon scattering. Altogether, the improvement of the electrical properties and decrease of the thermal conductivity results in a promising peak zT of ∼0.52 at 623 K of Cu 3 Sb 0.96 Pb 0.04 Se 4 sample, which is about 80% higher than that of the un-doped Cu 3 SbSe 4 . The current work provides a method which can reduce the thermal conductivity by forming heterojunction and also improve the electrical properties by doping of one element.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 16
·2324-2330
·
IF 3.304
Haiting Yan,Jianhui Li,Daomeng Liu,Xunan Jing,Daquan Wang,Lingjie Meng
Thin-layered WS2 nanostructures have attracted great attention owing to their superior structures and properties when compared to MoS2, including larger layer-spacing, higher energy gap and better photothermal and lubrication properties. However, it is still challenging to prepare high-quality WS2 nanosheets and assemble them into large quantities. In this work, we report a facile and efficient microwave-assisted solvothermal method for the synthesis of WS2 nanostructures in N-methyl-2-pyrrolidone (NMP) using cheap tungsten hexachloride (WCl6) and elemental sulfur (S) as starting materials. The formation of WS2 nanosheets and their controlled assembly into different morphologies (such as nanocones and nanoworms) were studied by adjusting the reactant concentration and reaction temperature. This method has also been successfully applied for preparation of other transition-metal dichalcogenides such as MoS2. The resulting WS2 and MoS2 nanomaterials were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The photothermal properties of WS2 nanostructures have been investigated and it was found that the WS2 nanosheets have the best photothermal efficiency and stable photothermal capacity, exhibiting great potential for photothermal therapy and other fields.
研究领域:
材料科学
·
纳米技术
·
光热治疗
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zhiyuan Liu,Qixuan Xiang,Hao Zhang,Xianglong Zhang,Hunjun Tan,Yaping Zhao
MgCo 2 O 4 is a promising electrode material in electrochemical energy storage devices. In this work, the supercritical CO 2 -assisted solvothermal (SCAS) method was applied to synthesize MgCo 2 O 4 nanomaterials for the first time. The crystallite size of the MgCo 2 O 4 prepared by SCAS was significantly smaller than the one prepared by the ethanol solvothermal method, reaching 9.0 nm at a CO 2 pressure of 16 MPa. The as-prepared MgCo 2 O 4 nanospheres exhibited a special spherical structure with abundant irregular pores and a high specific surface area of 69.9 m 2 /g. X-ray photoelectron spectroscopy demonstrated that the Co 3+ /Co 2+ ratio of the MgCo 2 O 4 was increased by the SCAS method and the mechanism of synthesizing MgCo 2 O 4 nanospheres was explored. In addition, the MgCo 2 O 4 electrode material prepared by the SCAS method exhibited a high specific capacitance of 741 F/g at 0.1 A/g. The results confirm that the SCAS method can synthesize ultrafine MgCo 2 O 4 nanoparticles with special morphology and high specific surface area, which are expected to be applied in high-performance electrode materials.
研究领域:
材料科学
·
电化学储能
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Wenbin Zhao,Jinhuai Hua,Yi Cao,Rui Yao,Yanshuo Li
A microwave-assisted solvothermal method was developed to achieve La 3+ exchange in NaA zeolite membranes for enhanced ethanol dehydration via pervaporation. Traditional ion-exchange processes are time-consuming and risk structural degradation, whereas the proposed approach utilizes alcohol-based solvents under microwave irradiation to accelerate ion exchange while preserving membrane integrity. By optimizing solvent selection (isopropanol) and La 3+ concentration (0.04–0.05 mol L −1 ), the modified La-LTA membrane exhibited simultaneous improvements in water flux (up to 12.78 % increase) and separation factor (up to 227 % enhancement), particularly in low-water-content systems. Characterization via SEM, XRD, and XPS confirmed retained crystallinity and successful La 3+ incorporation (35.42 % exchange degree). The method's universality was validated by exchanging other ions (Li + , Cu 2+ , Nd 3+ ), with Li-LTA and Nd-LTA membranes also showing dual performance enhancements. This work provides an energy-efficient, scalable strategy to tailor zeolite membranes for industrial dehydration applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Chemical Engineering Journal Advances
·
2025
·
IF 7.1
Tingting Lv,Hong Wang,Ruihai Li,Chengliang Yang,Ding Li,Wei Zhao,Jianxin Li
Although the advanced oxidation process based on persulfate (PS) is an attractive approach due to its high efficiency and environmental friendliness, the difficult degradability and low solubility of naphthalene (NAP) hinder its practical application for in situ chemical remediation of contaminated sites. Herein, this study reported that alkaline activated PS with acetonitrile (ACN) as assistant solvent for in-situ remediation of NAP contaminated soils to improve the removal efficiency. The results showed that the degradation rate of NAP in contaminated soil was up to 36.7 % on the 1st day in the presence of C PS = 382 mmol L -1 , and pH = 12, which was significantly higher than the NAP removal rate without the addition of ACN (8.6 %) under the same conditions. This indicated that the addition of ACN promoted the solubility of organic pollutants in the liquid phase and improved its degradation efficiency. The NAP removal rate (the 21st day) was up to 97.5 %. ESR tests and free radical quenching experiments indicated that SO 4 •− , ·OH and 1 O 2 were the dominant active species. The degradation mechanism of NAP mainly involved hydroxylation, decarboxylation, and ring opening reactions. The toxicity assessment using the Toxicity Estimation Software Tool (T.E.S.T.) and bioluminescent bacteria assays showed that NAP could eventually be degraded into less toxic degradation intermediates. In summary, this study confirmed the suitability of ACN enhanced alkaline activated PS system for the degradation of organic pollutants and provided some new ideas for the in situ large-scale remediation of organic contaminated sites.
研究领域:
环境科学
·
土壤修复
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产品关联
DOI
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2025
·
IF 3.4
Tingting Lv,Ruihai Li,Hong Wang,Chengliang Yang,Xinrui Chen,Ding Li,Wei Zhao,Cunhui Kou,Lixin Wang,Xiuxiu Huang,Jianxin Li
The development of efficient and sustainable remediation strategies is critical for treating volatile organic compound (VOCs)-contaminated soil. This study investigated the removal of methylbenzene (MB) and ethylbenzene (EB) from contaminated soil through co-solvent-assisted alkaline activation of persulfate (PS) system, The effect of the co-solvent in enhancing the desorption and solubilization of MB and EB was also evaluated. Under optimal conditions (C PS = 382 mmol L –1 , pH 12, 40% (v/v) acetonitrile (ACN) as co-solvent), the removal rates of MB and EB reached 41.5% and 50.9% on the 1 st day, significantly higher than those without ACN (11.4% and 16.2%, respectively). Moreover, the removal rates further increased to 91.7% for MB and 94.5% for EB on the 21 st day. The higher degradation rate of EB was attributed to the relatively weak benzylic C–C bond (76.4 kcal mol –1 ) and C–H bonds (85.4 kcal mol –1 ) at the ethyl site. Electron spin resonance (ESR) and quenching experiments confirmed that •OH and were the dominant reactive oxygen species, contributing 52.0% and 35.2% to MB degradation, respectively. The degradation of MB and EB proceeded via hydrogen abstraction, hydroxylation, electron transfer, and dealkylation, culminating in complete mineralization. Toxicity assessments using T.E.S.T. and bioluminescent bacteria assays indicated a significant reduction in ecological risk, with bioluminescence inhibition for MB and EB decreasing from 70.7% (very toxic) and 98.3% (very toxic) to 8.2% (low toxicity) and 5.6% (low toxicity), respectively. In summary, this study presents a promising strategy for the remediation of VOCs-contaminated soils.
研究领域:
环境科学
·
土壤修复
·
环境污染治理
·
高级氧化技术
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 13
·H952
·
IF 3.259
Ming Nie,Shun Lu,Dan Lei,Chi Yang,Zuzhen Zhao
Zeolitic imidazolate framework-8 is obtained rapidly within 30 min via ultrasonic-assisted solvothermal method. The structure, elemental composition and morphology are investigated by X-ray diffraction, energy-dispersive X-ray detector, scanning electron microscopy, transmission electron microscopy and Brunauer-Emmett-Teller. The results show that Zeolitic imidazolate framework-8 nanocrystals possess cubic sodalite-related structure and provide more active sites for adsorption. Furthermore, the prepared Zeolitic imidazolate framework-8 nanocrystals have been examined for the electrochemical sensor of dopamine using cyclic voltammetry and differential pulse voltammetry techniques. The electrochemical studies demonstrate that the modified electrode displayed enhanced catalytic activity in the process of oxidation of dopamine when the working potential is −100 mV. Additionally, we use the sensor to detect dopamine linearly over a concentration range from 5.0 × 10−8 to 2.0 × 10−5 M with a lower detection limit of 1.95 × 10−7 M (S/N = 3). Importantly, Zeolitic imidazolate framework-8 nanocrystals modified electrode showes favorable anti-interference ability and long-term stability.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Chen Yan,Na Li,Yuchi Zhang,Yun Wei
Cinnamaldehyde has been widely applied in various fields due to its special flavor and various pharmacological activities, such as antioxidant, anti-inflammatory and antibacterial properties. The strategy of quick and efficient enrichment for cinnamaldehyde is imperative. In this study, an electroosmotic coupled particle-assisted solvent flotation (ECPASF) system was designed for the cinnamaldehyde enrichment from cinnamon. The response surface method was used to optimize extraction parameters. Under optimal operating conditions, its yield was 9.33 ± 0.11 mg/g. Such high yield of cinnamaldehyde using the ECPASF might be because electroosmosis effectively alters the permeability of plant cells, which facilitates the release of cinnamaldehyde. In addition, both the crude extract of cinnamon and pure cinnamaldehyde showed good antioxidant activity. The results demonstrated that the ECPASF system is a sustainable and effective method for the extraction of cinnamaldehyde from cinnamon. It also has the prospect of being extended to the extraction of other natural products.
研究领域:
药理学
·
化学工程
·
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Yao Chen,Hong Wu,Bin Zhang,Junqi Chen,Zizhen Zhou,Xu Lu,Yun Zhou,Guoyu Wang,Guang Han,Xiaoyuan Zhou
Cu 2 Te-based compounds show promise for thermoelectric applications, but their synthesis typically involves ball milling or melting-annealing processes. Here, we present a surfactant-free microwave-assisted solvothermal method for the controlled synthesis of Cu 2 Te 1− x S x ( x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) nanostructures at 503 K within just 30 min. The substitution of sulfur promotes the formation of a hexagonal structure in Cu 2 Te 1− x S x with x of 0.2 – 0.5, and inhibits phase transitions during heating. Moreover, the alloying of sulfur contributes to a reduction in hole concentrations toward the optimal range, resulting in enhanced power factors ( e.g. , 910 μW m −1 K −2 at 825 K for Cu 2 Te 0.9 S 0.1 ) and reduced thermal conductivity ( e.g. , 0.53 W m −1 K −1 at 825 K for Cu 2 Te 0.5 S 0.5 ). Ultimately, Cu 2 Te 0.5 S 0.5 achieves a maximum dimensionless figure of merit of 0.80 at 825 K. This study offers a controllable solution-based strategy for synthesizing Cu 2 Te-based materials with tunable compositions and enhanced thermoelectric performance.
研究领域:
材料科学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 15
·3289
·
IF 4.6
Jingfei Luan,Tiannan Zhao
In this study, a Z-scheme Ho2InSbO7/Ag3PO4(HAO) heterojunction photocatalyst was successfully fabricated for the first time by ultrasound-assisted solvothermal method. The structural features, compositional components and morphological characteristics of the synthesized materials were thoroughly characterized by a series of techniques, including X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectrum, X-ray photoelectron spectroscopy, transmission electron microscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy. A comprehensive array of analytical techniques, including ultraviolet-visible diffuse reflectance absorption spectra, photoluminescence spectroscopy, time-resolved photoluminescence spectroscopy, photocurrent testing, electrochemical impedance spectroscopy, electron paramagnetic resonance, and ultraviolet photoelectron spectroscopy, was employed to systematically investigate the optical, chemical, and photoelectronic properties of the materials. Using oxytetracycline (OTC), a representative tetracycline antibiotic, as the target substrate, the photocatalytic activity of the HAO composite was assessed under visible light irradiation. Comparative analyses demonstrated that the photocatalytic degradation capability of the HAO composite surpassed those of its individual components. Notably, during the degradation process, the application of the HAO composite resulted in an impressive removal efficiency of 99.89% for OTC within a span of 95 min, along with a total organic carbon mineralization rate of 98.35%. This outstanding photocatalytic performance could be ascribed to the efficient Z-scheme electron-hole separation system occurring between Ho2InSbO7and Ag3PO4. Moreover, the adaptability and stability of the HAO heterojunction were thoroughly validated. Through experiments involving the capture of reactive species and electron paramagnetic resonance analysis, the active species generated by HAO were identified as hydroxyl radicals (•OH), superoxide anions (•O2−), and holes (h+). This identification provides valuable insights into the mechanisms and pathways associated with the photodegradation of OTC. In conclusion, this research not only elucidates the potential of HAO as an efficient Z-scheme heterojunction photocatalyst but also marks a significant contribution to the advancement of sustainable remediation strategies for OTC contamination.
研究领域:
环境科学
·
材料化学
·
催化
·
水处理
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2024
·
IF 3.7
Lei Xiao,Xinfei Wang,Tianfu Zhang,Xiaojun Feng,Kun Zhang,Junqing Yang,Xiaoming Jin,Gazi Hao,Wei Jiang
In order to achieve new energetic materials with high energy, low sensitivity, and moisture-proof properties, dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate (TKX-50)/ammonium perchlorate (AP) cocrystal (molar ratio 1:1) was successfully prepared through a spray-assisted solvent–nonsolvent method. SEM shows that the morphology of the cocrystal is different from those of the two raw materials. XRD and FT-IR spectra indicate the formation of the cocrystal. The apparent activation energy of the cocrystal is lower than that of raw TKX-50. The characteristic drop height (H50) is higher than that of TKX-50, while the friction sensitivity (P) of the cocrystal is lower. In addition, the moisture-proof property of the cocrystal is improved, showing good application potential.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 17
·8366
·
IF 4.9
Jingfei Luan,Boyang Liu,Liang Hao,Wenchen Han,Anan Liu
A high-performance Z-scheme heterojunction photocatalytic compound, ZnBiGdO4/SnS2(ZS), was prepared for the first time using a microwave-assisted solvothermal method. ZS significantly improved the separation efficiency of photoinduced carriers and effectively broadened the response range to visible light through the unique mechanism of the Z-type heterojunction. Therefore, ZS exhibited an excellent photocatalytic performance during the degradation process of tinidazole (TNZ). Specifically, the removal rate of TNZ by ZS reached 99.63%, and the removal rate of total organic carbon (TOC) reached 98.37% with ZS as catalyst under visible light irradiation (VLIN). Compared to other photocatalysts, the photocatalytic performance of ZS was significantly better than that of ZnBiGdO4, SnS2, or N-doped TiO2(N-T). The removal rate of TNZ by ZS was 1.12 times, 1.26 times, or 2.41 times higher than that by ZnBiGdO4, SnS2, or N-T, respectively. The mineralization efficiency of TNZ for TOC with ZS as a catalyst was 1.15 times, 1.28 times, or 2.57 times higher than that with ZnBiGdO4, SnS2, or N-T as a catalyst, respectively. Free radical scavenging experiments and the electron paramagnetic resonance experiments confirmed that ZS could generate multiple reactive species such as hydroxyl radicals (•OH), superoxide anions (•O2−), and photoinduced holes (h+) during the photocatalytic degradation process of TNZ. The photocatalytic degradation performance of ZS on TNZ under VLIN was evaluated, concurrently, the reliability, reproducibility, and stability of ZS were verified by five cycle experiments. This study explored the degradation mechanism and degradation pathway of TNZ with ZS as a catalyst under VLIN. This study not only provides new ideas for the design and preparation of Z-type heterojunction photocatalysts but also lays an important foundation for the development of efficient environmental remediation technologies for TNZ pollution.
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产品关联
DOI
PubMed
高影响因子
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