Desalination and Water Treatment
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2024
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IF 1
Ling Yu,Yiqiao Xie,Mengxiao Liu,Lianyu Liu,Zhi Chen,Yang Yu
The wide-spread micropollutants in water have posed severe risks to human health and eco-environment. However, the current treatment techniques generally suffer from low efficiency, high cost and unpractical application feasibility. In this study, a piezoelectric membrane was fabricated by embedding zinc oxide (ZnO) nanorods with several micrometer length into polytetrafluoroethylene nanofiber membrane and applied for the removal of carbamazepine (CBZ) from water. After the sintering, the prepared membrane showed a narrower pore size distribution with the average pore size of ∼1.7 µm. The addition of ZnO nanorods could significantly improve the piezoelectric property of the membrane. During the membrane filtration, the peroxymonosulfate could be effectively activated by the prepared piezoelectric membrane with 2 % ZnO dosage to generate free radicals, achieving about 83.1 % of CBZ from water. According to the radical quenching tests and electron spin-resonance analysis, the hydroxyl radical, sulfate radical, singlet oxygen and superoxide radical greatly participated in the CBZ removal. The CBZ removal efficiency in the US/PMS/PTFE@ZnO-2 system was decreased by 18.2 % after continuous 5-cycle operation, but the performance could be easily renewed by methanol rinsing, demonstrating its attractive reusability and application potential on the efficient removal of micropollutants from water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2024
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IF 3.2
Bo Wang,Zihao Pan,Ziyan Zhao,Bo Zhou,Xuejian Liu,Zhengren Huang,Yan Liu
In this paper, we designed two series of the ZnO-B 2 O 3 -SiO 2 (ZBS) glass to explore their applicability for joining AlN ceramic. The density, flexural strength, structure, characteristic temperature, coefficient of thermal expansion (CTE) and crystallization behavior of the ZBS glass with varying ZnO and B 2 O 3 content were systematically studied. The results show that as B 2 O 3 content increase, the glass network is disrupted with the transition from three-dimensional shelf-like structure [BO 4 ] to two-dimensional layers [BO 3 ], increasing the number of the broken bonds, while an increase in ZnO results in a more compact glass network structure. We also found that both glass transition temperature (T g ) and softening temperature (T S ) exhibit a declining trend with the increase in B 2 O 3 and ZnO. Zn 2 SiO 4 and ZnAl 2 O 4 , began to precipitate after heat treatments in all the samples except 60ZnO-30B 2 O 3 –10SiO 2 (abbreviated as B30), where the diffraction peaks do not appear in Zn 2 SiO 4 but in Zn 4 B 6 O 13 . Notably, Zn 2 SiO 4 is the main phase for most samples while the main phase of B30 sample is ZnAl 2 O 4 . The CTE increases from 4.6 to 5.03 (× 10 –6 / °C) and 4.23 to 4.73 (× 10 –6 / °C) with an increase of B 2 O 3 and ZnO content, respectively. Among these, the CTE of B30 sample is compatible with that of AlN ceramic substrate. The optimal shear strength, 60.32±10.26 MPa, was achieved with B30 samples at 750 °C. The high strength was attributed to the interfacial reaction that leads to strong chemical bonding and the uniform distribution of the ZnAl 2 O 4 in the interlayer, which reinforces the strength of the interlayer itself.
研究领域:
材料科学
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无机非金属材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2025
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IF 6.3
Yan Chen,Qingsong Luo,Yu Wan,Shuang Gao,Yanting Wang,Changhao Feng
Background The rapid identification of n-butanol holds substantial significance; however, the current response speed of n-butanol gas sensors is relatively slow. The ZnO/SnO 2 composite nanofibers present a considerable prospect as a suitable alternative for conventional n-butanol sensors. Methods Pure SnO 2 and composite nanofibers composed of ZnO/SnO 2 with distinct molar ratios were crafted via the electrospinning technique. The microstructure and components of these composite nanofibers were analyzed and identified using XRD and SEM. Significant findings The ZnO/SnO 2 composite nanofibers-based gas sensor (ZS2) exhibited enhanced response towards n-butanol, achieving a high response of 29.68 to 30 ppm n-butanol at 150 °C, which was 3.3 times greater than that of SnO 2 . Moreover, the sensor also showcased a swift response time, taking just 1 s to react. Furthermore, the ZS2 sensor had a lower potential limit for detecting n-butanol, with a value of 0.27 ppm. The good repeatability and stability were also confirmed in this study. The successful creation of heterojunctions is thought to be contributing factors to ZS2 nanofibers’ superior sensing capabilities. Therefore, ZnO/SnO 2 composite nanofibers can be considered as a promising candidate for sensing materials in practical applications.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yue Feng,Xun Liu,Jingyi Wang,Xinyu Zou,Dianlin Wang,Lei Xie
Nanostructures have been commonly incorporated into oil-water separation membranes to improve their antifouling properties. However, the antifouling mechanism of the membrane with different nanostructures is still unclear. In this work, ZnO nanostructures, i.e., nanorods, hollow nanorods and randomly assemble nanosheets, were constructed on polyvinylidene fluoride (PVDF) membrane surfaces. The resulted membranes exhibited improved antifouling properties in comparison with the pristine PVDF membrane, and the hollow nanorods showed the best antifouling property. The antifouling mechanism was investigated through direct force measurements between oil drops and membrane surfaces using atomic force microscopy. The theoretical analysis of approach force curves indicated that the repulsive electrical double layer force was enhanced at higher pH and in the presence of ZnO nanostructures, which prevented the oil attachment on the membrane surface. The retraction force curves suggested that the adhesion between oil and membrane was significantly affected by the ZnO nanostructures, and the adhesion followed the trend of hollow nanorods < randomly assemble nanosheets < nanorods. Consequently, the oil drops on the membrane with hollow nanorods could be easily removed by water rinsing, which agreed with the flux recovery results. This work provided a fundamental understanding of the antifouling mechanism of the oil-water separation membranes with nanostructures, and a useful guidance for constructing suitable surface structures for efficient oil-water separation membranes.
研究领域:
材料科学
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环境工程
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
Sensor Review
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2025
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IF 1.4
Zhaopeng Li,Pei Li,Peisi Yin,Xin Zhao,Yangting Hu,Fei Sun,Xia Sun,Zhenhe Wang
Purpose This paper aims to develop a highly sensitive resistive gas sensor for accurately detecting ethyl formate to achieve reliable and real-time monitoring of fish meal spoilage. Design/methodology/approach Based on the one-step solvothermal reduction method, in a specific triethylene glycol solution environment and high temperature, the 3D ZnO sensing material with a jackfruit-like structure was prepared for detecting ethyl formate gas in fish meal. Findings The gas sensor based on 3D ZnO displays high sensor response (69.68–100 ppm) at 280°C and 43% RH and good sensor response (12.18–100 ppm) at 280°C and 80% RH, ultra-low detection limit of 10 ppb at 43% RH, excellent selectivity, repeatability and long-term stability. The sensing mechanism is due to the gain or loss of electrons caused by the sensor surface reaction. The unique jackfruit-like structure, abundant oxygen vacancies and large surface area may be another factor contributing to its excellent ethyl formate gas sensing performance. Originality/value The authors first developed an ethyl formate gas sensor, and the results were compared with the previously published data. The analysis showed the ZnO gas sensor demonstrated excellent sensing performance. This work highlights the potential of high response ethyl formate gas sensors to accurately evaluate fish meal quality.
研究领域:
材料科学
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食品科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2016
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IF 2.758
Weixuan Zeng,Xianfeng Yang,Minghui Shang,Xiewen Xu,Weiyou Yang,Huilin Hou
The tailored doping levels towards the band gap tunability are one of the challenges to push forward the potential application of one-dimensional (1D) ZnO nanostructures in the opto/electric nanodevices . In present work, we reported the exploration of Mg-doped ZnO nanofibers via electrospinning of polyvinylpyrrolidone (PVP), Zn(CH 3 COO) 2 (ZnAc) and Mg(CH 3 COO) 2 (MgAc), followed by calcination in air. The resultant products were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscope (HRTEM), and X-ray photoelectron spectroscopy (XPS). The optical measurements (UV–vis) of the Mg-doped ZnO nanofibers suggested that the optical band gaps of the ZnO nanofibers could be tuned from 3.33 to 3.40 eV as a function of the Mg doing levels. This tunability of the band gap of ZnO nanofibers with an intentional impurity could eventually be useful for optoelectronic applications .
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Qihang Sun,Baoyu Li,Jiaxin Hu,Hongquan Fu,Juan Zhang,Jinming Chang,Hejun Gao,Yunwen Liao
U(VI) in nuclear wastewater threatens human health and the environment due to its high toxicity and mobility. Photocatalysis is seen as a promising, simple, low-cost, and sustainable method for wastewater treatment, but existing photocatalysts face challenges like complex preparation and severe electron-hole recombination. In this work, ellipsoidal Se-linked ZnSe/ZnO was in situ constructed using a simple one-pot hydrothermal method, with non-metallic selenium serving as the carrier. In 30 minutes, the removal rate of U(VI) can reach 90.2 % in 100 mg/L U(VI) solution. The reaction kinetics of the optimal Se/ZnSe/ZnO ratio reached 0.14939 min −1 , which is nearly 10 times that of pure ZnO. Photocatalytic analysis revealed that introducing Se as the medium for electron transport in the composite material can effectively reduce electron-hole recombination, thereby enhancing photocatalytic efficiency. The results of this study offer a simple and efficient new method for photocatalytic reduction of U(VI) and provide an effective strategy for establishing a conductive medium in the heterojunction using a one-pot hydrothermal method.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Lijia Zhao,Shupeng Sun,Su Zhang,Xiaogan Li
Using uniform carbon nanospheres as sacrificial templates, gold nanoparticle-modified ZnO@ In 2 O 3 hollow nanospheres with controlled dimensions and porous architectures were successfully synthesized through water bath, hydrothermal and chemical reduction methods. Gas sensing evaluation revealed that the Au-decorated ZnO@ In 2 O 3 hollow nanostructures exhibited a dramatically amplified response up to 14.8 when exposed to 10 ppm formaldehyde analyte at room temperature. Furthermore, multifaceted performance benefits of Au-decorated ZnO@ In 2 O 3 over single-phase ZnO, Au-ZnO, ZnO@ In 2 O 3 heterojunction-based composites were observed, including excellent selectivity towards formaldehyde even in complex gas mixtures; tremendous sensitivity enhancement stemming from synergies between efficient gas diffusion through hollow heterojunction nanospheres and accelerated surface reactions at catalytically-active Au sites; and rapid, fully-reversible response/recovery time of 32 s and 42 s, respectively. In-depth investigations were conducted into the fundamental sensing mechanisms enabling formaldehyde detection using AC impedance spectroscopy, in situ diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS), and density functional theory (DFT) computational modeling analyses.
研究领域:
材料科学
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环境科学
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纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
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2025
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IF 5.5
Juanjuan Yang,Dandan Shao
CO2 to methanol is considered a promising method for CO2 conversion and utilization, yet achieving desirable selectivity remains a significant challenge. Herein, efficient CO2 hydrogenation to methanol is achieved by synthesizing Co0.7ZnO with abundant oxygen vacancies (Ov) through the incorporation of a portion of Co into nanoscale ZnO. By tuning the molar ratio of Co/(Co+Zn) in CoxZnO to increase the Ov content to 71%, CO2 adsorption and activation to form formate (COOH*) are enhanced, thereby reducing the CO selectivity. The efficiency of the hydrogenation of CO2 to methanol was optimized with Co0.7ZnO, which exhibited an impressive methanol formation rate of 2.1 mmol/(g h) and a selectivity of up to 96.7%. The unique structure of incorporating partial Co into nanoscale ZnO to increase the level of Ov not only reduces the level of CO selectivity but also inhibits methane formation, thereby contributing to the high methanol selectivity. This study presents an innovative strategic design through partial doping, which is essential for controlling the selectivity of target products in the CO2 hydrogenation.
研究领域:
化学工程
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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
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Peng Shi,Hongju Chen,Shenwen Fang,Rui Liu,Ming Duan
Hydraulic oil is essential for machine operation, but water contamination can impair its functionality and lead to mechanical damage. Traditional dehydration methods, such as evaporation, are energy-intensive and may degrade the oil's quality. While filtration has been used to reduce water content in light oils, its application to highly viscous hydraulic oil remains unexplored. This study introduces a novel filter fabricated using ZnO, TiO₂, and stearic acid (STA)-modified mesh via a hydrothermal approach. The filter demonstrated the ability to reduce the water content in 46# hydraulic oil from 25,000 mg/L to below 162 mg/L, irrespective of the presence of surfactants. Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy, X-ray Photoelectron Spectroscopy (XPS), and performance evaluations suggest that esterification between stearic acid and oxygen groups on the TiO₂ surface is the key mechanism driving the filter's dehydration efficiency. This work represents a significant advancement in the deep dehydration of viscous oils through filtration, offering a low-energy and effective solution for enhancing hydraulic oil performance.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Shuo Geng,Shu Min Lin,Shi Gang Liu,Wei Zhang,Nian Bing Li,Hong Qun Luo
We synthesized polyethyleneimine capped ZnO quantum dots (PEI-ZnO QDs) which dispersed well in ethanol by using a two-step method. UV–visible absorption spectroscopy, photoluminescence, Fourier transform infrared spectroscopy, high resolution transmission electron microscope, and field emission scanning electron microscope were used to characterize the as-prepared PEI-ZnO QDs. It emitted green-yellow fluorescence (527 nm) for excitation at 355 nm. We used the PEI-ZnO QDs to determine the alcoholic strength because of its different property in water and ethanol which caused decrease in the PEI-ZnO QDs fluorescence intensity with increasing water content. With this method, we determined the alcoholic strength of different artificial samples with a linear range from 20% to 60% vol and detected commercial spirits with satisfactory results.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Junping Shi,Lielin Wang,Hua Xie,Shidi Yao,Xiuqi Pu,Zhu Liu,Xiaojiang Chen,Yun Ding
Highly reactive fission product cesium may volatilize at high temperatures. PbO–B 2 O 3 –ZnO glass with low melting temperature and excellent chemical durability can be used as a potential matrix for immobilizing Cs. In this work, five PbO–B 2 O 3 –ZnO glasses with different contents of Pb were synthesized via a melt-quenching process. These specimens were characterized with XRD , Raman, DTA and viscosity measurements . The results showed that the melting temperature decreases, viscosity decreases and structural polymerization increases with increasing lead content. Cs-doped 35PbO–60B 2 O 3 –5ZnO glasses were synthesized at low temperatures. XRD results revealed the amorphous nature of the glass solidified bodies. EDS and ICP-MS studies confirmed that Cs is retained in the glass. Clear vitrified waste products containing up to 13.6 wt% Cs were obtained. The chemical durability of the samples was evaluated via PCT-A and MCC-1 method. For the glass solidified body comprising a Cs/matrix ratio of 0.136, the leaching rate of Cs was 1.6 × 10 −1 g m −2 d −1 from the PCT test, which indicates that it has a good chemical stability. 35PbO–60B 2 O 3 –5ZnO glass was expected to be a suitable matrix for Cs immobilization.
研究领域:
材料科学
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核废料管理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）