APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Yan Li,Zi-Ning Li,Xiao-Xue Lian,Jing-wen Liu,Ai-lin Li
The development of highly sensitive and selective gas sensors for detection of nitrogen dioxide (NO 2 ) is imperative for environmental monitoring and industrial safety. Herein, we report a novel multi-dimensional heterostructure, 1D MXene (Ti 3 C 2 T x ) nanofibers were derived from 2D MXene (Ti 3 C 2 T x ) through alkaline treatment, then integrated with 0D ZnO nanoparticles for high-performance NO 2 sensing. The unique architecture synergistically combines the high carrier mobility and abundant surface functional terminals of MXene (Ti 3 C 2 T x ) with tunable semiconducting characteristics of ZnO. Benefiting from enhanced charge transfer at the heterointerfaces and maximized active sites, optimized sensor demonstrates exceptional responses to NO 2 at room temperature, realizing a substantial response value of 64.58% towards 50 ppm NO 2 , significantly surpassing pristine MXene (Ti 3 C 2 T x ). Notably, the multi-dimensional composite exhibits an ultra-low limit of detection of 25.14 ppb for NO 2 , which meets the requirements for ppb-level detection. Additionally, the response of sensor to NO 2 (64.58%) significantly exceeds that to other interfering gases at equivalent concentrations, such as NH 3 (0.7%) and trimethylamine (7.3%). Furthermore, during long-term stability testing, the response to NO 2 at equivalent concentrations exhibited only a 4.7% decay over approximately 30 days. Density functional theory calculations reveal that the binding energy of this multi-dimensional structure for NO 2 is 0.5 eV, significantly higher than that for other gas species. Theoretical simulations reveal that improved performance originates from strengthened NO 2 adsorption energy and modulated electron depletion layers at hybrid interface. This work provides viable solution for fabricating advanced gas sensors through multi-dimensional material engineering, demonstrating great potential in real-time air quality analysis.
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高影响因子
RSC Advances
·
2015
·Vol. 6
·期 3
·2241-2251
·
IF 3.84
Xiaohua Sun,Weilong Luo,Linlin Chen,Linjie Zheng,Chao Bao,Panpan Sun,Niu Huang,Yihua Sun,Liang Fang,Lei Wang
Porous Al doped ZnO (AZO) nanosheets have been prepared as an efficient multifunctional water treatment material. Their fundamental properties were characterized by various spectroscopic testing methods. The AZO nanosheets displayed very rapid adsorption rate and high adsorption capacity for methyl orange (MO) dye. The kinetics and equilibrium of adsorption process were found to follow the pseudo-second-order kinetic and Langmuir isotherm models, respectively. Furthermore, the AZO nanosheets exhibited superior photodecolorizative activity compared with the commercial P25 TiO2 nanoparticles. It was found that Al doping increased the zeta potential of AZO nanosheets and then significantly enhanced the adsorption capacity for MO dye and, at the same time, retarded the recombination of photoexcited electron–hole pairs, and prolonged the lifetime of the photo-generated carriers, and then improved the semiconductor photocatalytic activity. In addition, the visible-light-driven dye photosensitized degradation was also an important reason for enhanced photodecolorizative activity. Therefore, AZO nanosheets are a potential multifunctional water treatment material combining highly efficient adsorption and photocatalytic degradation.
研究领域:
材料科学
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环境化学
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纳米技术
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光催化
·
水处理
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Zhenrui Yang,Jiyong Zhang,Wentao Zhang,Qin Zhou,Jiayuan Shen,Yi Huang
Herein, the Co 2+ -doped ZnO nanoarrays with high photocatalytic activity were grown on the stainless steel wire mesh (Co 2+ -ZnO@SSM) by the hydrothermal method , and the special micro-nano structure with high surface roughness was obtained through stearic acid (STA) surface modification for the superhydrophobicity. By changing the concentrations of STA, the hydrophilic and hydrophobic structure of Co 2+ -ZnO/STA@SSM could be controlled, and the water contact angle in air reached 154.9° when the STA concentration was 0.04 mol/L. In different oil/water mixtures, the Co 2+ -ZnO/STA@SSM showed excellent oil/water separation efficiency and separation flux, and after 16 separation cycles and bending tests, the separation efficiency remained above 89%. In addition, the Co 2+ -ZnO/STA@SSM still maintained excellent visible photocatalytic activity, and the photocatalytic efficiency for methylene blue degradation could reach 93% in water. This dual-functional Co 2+ -ZnO/STA@SSM membrane with visible-light photocatalysis and oil/water separation provides a potential purification strategy for the complex industrial wastewater.
研究领域:
材料科学
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环境工程
·
纳米技术
·
物理化学
·
催化化学
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高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Muhammad Khalid Hussain,N.R. Khalid,M.B. Tahir,Muhammad Tanveer,Tahir Iqbal,Maira Liaqat
A novel ternary ZnO/CuO/MoO 3 (ZnO/CuO/M) heterojunction photocatalysts with the nanorods morphology was synthesized by facile hydrothermal treatment . The surface morphology as nanorods, optical properties , photogenerated separation/transfer of charge carriers and photocatalytic properties were characterized for all developed photocatalysts. The photodegradation of organic pollutants including rhodamine B (RhB) and alizarin yellow (AY) dyes was studied under the visible light irradiance. The ternary ZnO/CuO/M nanorods revealed improved photocatalytic performance than pristine ZnO, CuO, MoO 3 and binary CuO/M composite. Amongst all ternary ZnO/CuO/M photocatalysts displayed the best photocatalytic activity for RhB (97%) and AY (79%) dyes within 120 min, which is 57 times and 64 times higher than that of pristine MoO 3 . Reactive trapping experiments were also executed qualitatively to perceive the characters of different active species for both dyes degradation. The improved photocatalytic presentation could be credited to the development of the ZnO/CuO/M heterojunction photocatalysts, which is advantageous for efficient fast transfer and separation of the photoexcited charge carriers.
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Analytical Methods
·
2023
·Vol. 16
·期 3
·411-419
·
IF 3.1
Xiaohui Ren,Xinyue Song,Lili Wang,Wenjie Ma,Xin Li
The reliable and accurate detection of unauthorized additives in food is significant to prevent health risks. In recent years, surface-enhanced Raman spectroscopy (SERS) with fast, simple, and sensitive capabilities has been widely used for food safety analysis. In order to detect illegally added dye molecule rhodamine 6G and small molecule melamine in food, we have proposed a fast, convenient, and label-free SERS detection technology using flower-like Ag/ZnO as the SERS substrate. The structure and morphology of the flower-like Ag/ZnO were characterized by scanning electron microscopy, energy dispersive spectrometery, transmission electron microscopy, and X-ray diffraction analysis. We investigated the SERS effect and sensitivity of flower-like Ag/ZnO toward rhodamine 6G and melamine. The synergistic effect of flower-like Ag/ZnO provides high SERS activity for the detection of rhodamine 6G and melamine at the lowest detection concentrations of 0.5 ng mL−1 and 1.0 ng mL−1, respectively. Therefore, flower-like Ag/ZnO with good sensitivity and uniformity has potential for improving the detection of illegal food additives.
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PubMed
高影响因子
ANALYTICAL LETTERS
·
2023
·
IF 2
Xiaoyu Zhang,Peiran Meng,Wei Wang,Xiwen Li,Zuan Yang,Shaokai Du,Yue Sun
Simultaneous determination of erythromycin (Ery) and hemoglobin (Hb) is of great significance for clinical diagnosis of many diseases. ZnO nanorods modified with Au nanoparticles were fabricated as an interface on the flexible carbon cloth (CC) and utilized to simultaneously determine Ery and Hb by a simple electrochemical method. The results demonstrated that Au/ZnO/CC displayed excellent analytical performance for Ery with a low detection limit of 3.38 × 10−7 mg/L and a linear range from 1 × 10−6 to 1 × 10−1 mg/L. At the same time, the sensor also showed a sensitive response to Hb with a low detection limit of 2.07 × 10−7 mg/L and a linear range from 1 × 10−6 to 1 × 10−1 mg/L. This work provides a viable approach for designing a flexible electrode and sensitive simultaneous determination of Ery and Hb.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Huihui Jiang,Qian Liu,Hang Zhang,Peilin Yang,Tianyan You
The development of effective strategies for the detection of oxytetracycline (OTC) in soil is of great importance for preserving agri-environmental safety and human health. Herein, a novel photoactive material of metal-organic framework (MOF) derived ZnO nanopolyhedra/graphitic carbon nitride (ZnO/g-C 3 N 4 ) heterojunction was designed by mixing calcination of zeolite imidazole framework-8 (ZIF-8) and melamine . A self-powered photoelectrochemical aptasensor for the sensitive and selective detection of OTC in soil was proposed using ZnO/g-C 3 N 4 as the photoanode . The photoactivity of the MOF derived ZnO nanopolyhedra was regulated effectively by the introduction of g-C 3 N 4 , which resulted in a 7-fold increase in the photocurrent of the ZnO nanopolyhedra at a bias potential of 0 V. It was assigned to the higher carrier density of ZnO/g-C 3 N 4 . By virtue of the amplified photocurrent of ZnO/g-C 3 N 4 , the specificity of the OTC aptamer and the anti-interference ability of the self-powered sensing method, the designed aptasensor demonstrated the advantages of a wide linear range (0.005–200 nM), low limit of detection (1.49 × 10 −3 nM), good selectivity and good reproducibility. For real soil sample analysis, satisfactory recoveries were obtained and further verified by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS).
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Chuanqiang Li,Xiang Liu,Xinyu Yang,Tao Peng,Yuqin Li,Maowen Chen,Chuanchuan Lin,Jing Jiang,Ziyu Su,Weijian Kong,Yang Wang
Tetragonal multilayered ZnO/CuO composites prepared by the annealing of a Zn- and Cu-containing pillar-layered metal-organic framework were characterized by using instrumental techniques and investigated as catalysts for the degradation of 4-nitrophenol (4-NP) under irradiation with UV–vis light. The as synthesized samples contained p-n junctions, amorphous-crystalline heterojunctions , which benefitted light absorption and charge separation. The calcination temperature significantly influenced both the physicochemical properties and photocatalytic activities of these composites. The sample obtained at 400 °C (TL-ZC-400) exhibited the best photocatalytic performance, achieving a 4-NP degradation efficiency of 93.93% after 40 min of illumination. The TL-ZC-400 still showed high photodegradation ability (97.2%) after four times recycling. Furthermore, the recombination of ZnO and CuO adjusted the band gap structure of TL-ZC-400. Radical trapping experiments showed that the degradation of 4-NP was mainly mediated by hydroxyl radicals and holes. A possible photocatalytic mechanism was also proposed in this study.
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JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 61
·期 20
·2451-2461
·
IF 3.4
Jingda Huang,Shite Lin,Yipeng Liang,Enfu Wang,Yu Miao,Wenbiao Zhang,Kuichuan Sheng
It is still a serious challenge to construct a water-soluble polymer-based air filtration membrane with high efficiency and good mechanical properties by electrospinning. In the study, using polyvinyl alcohol (PVA) and polyacetylimide (PEI) as the main materials, both nanocellulosic crystal (CNC) and zinc oxide (ZnO) as the synergistic reinforcers and methyltrimethoxysilane (MTMS) as the hydrophobic modifier, the electrospun PVA/PEI/CNC/ZnO composite nanofibrous membrane with dual air filtration mechanisms was established. One of the mechanisms was the interception of the three-dimensional network structure built by the composite nanofibrous membrane, the other was the electrostatic adsorption provided by CNC. Based on the dual air filtration mechanisms, the filtration efficiency of particulate matter 2.5 (PM2.5) reached 98.20%. Moreover, the composite nanofibrous membrane displayed a good thermal stability and could still maintain more than the filtration efficiency of 83% and low-pressure drop after treatment at 200 °C for 1 h. Moreover, the composite nanofibrous membrane could still maintain the filtration efficiency (97.3%) and low-pressure drop (110.7 Pa) after five washing cycles after filtration, reflecting good reusability. Interestingly, the PVA/PEI/CNC/ZnO composite nanofibrous membrane was simple to produce and demonstrated excellent filtration efficiency, as well as excellent thermal stability, which could be an effective barrier against PM2.5 invasion. Graphical
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ENVIRONMENTAL POLLUTION
·
2021
·
IF 8.071
Sen Yan,Sinuo Tian,Zhiyuan Meng,Wei Sun,Ning Xu,Ming Jia,Shiran Huang,Yu Wang,Zhiqiang Zhou,Jinling Diao,Wentao Zhu
Although many toxicological studies on pesticides and nanoparticles have been conducted, it is not clear whether nanoparticles will increase the toxicity of pesticides. In this study, we chose imidacloprid (IMI) as a representative pesticide, and explored the influence of ZnO NPs on the toxic effect of IMI. In addition, we studied the bioaccumulation of IMI in mice. Using biochemical index analysis, liver histopathological analysis, non-targeted metabolomics, and LC/MS analysis, we found that ZnO NPs increased the toxicity of IMI, which may be related to the increase in IMI bioaccumulation in mice. In addition, we used intestinal histopathological analysis, RT-qPCR, and 16sRNA sequencing to find that the disturbance of the gut microbiota and the impaired intestinal barrier caused by ZnO NPs may be the reason for the increase in IMI bioaccumulation. In summary, our results indicate that ZnO NPs disrupted the intestinal barrier and enhanced the bioaccumulation of IMI, and therefore increased the toxicity of IMI in mice. Our research has deepened the toxicological insights between nanomaterials and pesticides.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Guiming Xie,Xingyang Bai,Yi Man,Pengju Ren,Rongrong Jin,Runduo Zhang,Kostya (Ken) Ostrikov,Zhou-jun Wang,Qingyuan Yang
Innovative catalyst design and in-depth mechanism understanding are imperative for industrialization of CO 2 hydrogenation to methanol. Herein, Al-doped Cu/ZnO catalysts, Cu/Al-ZnO-x (x = 1/32, 1/16 and 1/8, denoting Al/Zn molar ratio), were creatively synthesized using MIL-53(Al) as Al sources and reactive templates. The Cu/Al-ZnO-1/16 catalyst exhibited the highest methanol production rate among the Cu/Al-ZnO-x catalysts, which was 1.93 times as active as the conventional Cu/Al-ZnO-1/16-C catalyst using Al(NO 3 ) 3 ·9H 2 O as Al source. Structural characterizations reveal that the use of MIL-53(Al) led to higher S BET , more uniform Al distribution, more abundant oxygen vacancies, more appropriate metal-support interactions and larger amount of medium basic sites. Mechanism studies demonstrate that Al doping would markedly induce oxygen vacancy formation on Cu-ZnO interfaces and thus significantly boost methanol synthesis activity. This work offers a facile approach to develop efficient methanol synthesis catalysts and provides new insights into the nature of Al promotion in Cu/ZnO-based catalysts.
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 8
·5041-5052
·
IF 3.553
Hu Leqi,Jia Fuchao,Wang Shuo,Shao Xingyan,Wang Xiaomei,Sun Yuping,Yin GuangChao,Zhou Tong,Rajan Ramachandran,Feng Zhenyu,Liu Bo
In the present study, the nano-composite of Co-doped g-C 3 N 4 and ZnO (Co–C 3 N 4 /ZnO) sensor was successfully prepared by using solid-phase precursor synthesis method. The crystalline phases were analyzed by X-ray diffraction (XRD), the microstructure of Co–C 3 N 4 /ZnO sensor was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the chemical bonding states were analyzed by X-ray photoelectron spectroscopy (XPS). The gas sensing performance of Co–C 3 N 4 /ZnO sensor was systematically studied and compared with other sensors at the operating temperature of 200–370 °C, and the highest response was observed at 370 °C. Interestingly, Co–C 3 N 4 /ZnO sensor exhibited better response to o-xylene, m-xylene and p-xylene compared with other BTEX gases tested in this study; especially about 11 times higher response was observed against p-xylene compared with pure ZnO sensor at 370 °C. In addition, this sensor showed good stability and repeatability even after 14 weeks with a response/recovery time of 2 s/2 s. The improved gas sensing performance of this sensor was attributed to the formation of more active sites and more number of active oxygen species on the surface of ZnO. Based on these results, it could be ideal to explore Co–C 3 N 4 /ZnO sensor for the rapid detection of BTEX gases, specifically for p-xylene, in the surrounding environment.
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