ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Han Wu,Yu Wang,Duan Jiang,Xiaomin Chen,Jingping Tan,Zhenlin Xu,Hongtao Lei,Xiangmei Li
Background Mercury is one of the most toxic heavy metal contaminants that can be harmful to human health through the food chain. Recently, the colorimetric detection of heavy metals based on nanozyme catalytic activity has received extensive interest due to the simplicity, signal visibility and suitability for in situ detection. However, the majority of these nanozymes that can be utilized for detecting mercury with high synthesis temperature and complicated synthesis methods, which limited their practical application. Results In this work, flower-like ZnO@Pt composites were simply synthesized at room temperature , the flower-like structure and the high electron mobility of ZnO endow ZnO@Pt with stronger peroxidase-like activity. Consequently, dual-mode (UV–vis and smartphone) colorimetric sensors were designed to detect Hg 2+ . In UV–vis mode, the Hg 2+ concentration linear range was 10–400 nM, and the limit of detection (LOD) was 0.54 nM. In smartphone mode, the Hg 2+ concentration linear range was 50–1250 nM, and the LOD was 29.8 nM. A parallel analysis in 3 real water samples was confirmed by ICP-MS, the results showed good correlations (R 2 > 0.98), indicating the practical reliability of these sensors. Significance The novel flower-like ZnO@Pt composites with high stability, catalytic activity and Hg 2+ response were simply synthesized at room temperature, simplifying the synthesis steps and reducing costs. The sensitivity of the developed colorimetric sensor in UV–vis mode was 3–145 times higher than that of the similar methods. The colorimetric sensor in smartphone mode broadened the detection range and improved the portability of Hg 2+ detection. Thus, the dual-mode (UV–vis and smartphone) colorimetric sensors providing new detection modes for rapid monitoring of Hg 2+ in environmental water.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2021
·
IF 6.064
Mengqi Wang,Kaiyue Zhang,Feixiang Ji,Yurong Guo,Chao Wang,Shiping Wang,Ya Chu,Guangjiu Zhao
A water-soluble probe composite material (CDs/ZnO) was synthesized by microwave pyrolysis methods of citric acid , urea and zinc oxide (ZnO) with aggregation-induced emission activity. We creatively realized the composite of CDs and nano-ZnO in the form of foam, then used as bactericide for the first time and showed excellent antibacterial properties. Also, the composite materials overcame the problem of aggregation-induced quenching (ACQ) and realized solid-state emission. The materials had two different emission centers, and the two emission peaks were varied with the change of excitation wavelength. Furthermore, Methyl red (MR) showed fluorescence quenching for CDs/ZnO with obvious linear correlation, which demonstrated potential in the measurement of MR in dyeing wastewater. The CDs/ZnO we obtained perfectly inherited the advantages of CDs and nano ZnO , it has not just no cytotoxicity to cells, but also has a good killing effect on bacteria. Hence, this work shows significant adaptable fluorescence-based protocol with enormous potential applications in biology.
研究领域:
材料科学与工程
·
生物学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 6
·期 3
·1210-1218
·
IF 8.867
Tingting Yang,Jiawei Xue,Hao Tan,Anjian Xie,Shikuo Li,Wensheng Yan,Yuhua Shen
Highly ordered heteronanostructures with binder-free interfaces are the key factors in developing high-performance photoanodes. Here, we design and fabricate three-dimensional ordered macroporous ZnO/ZnFe2O4 inverse opals with binder-free heterojunction interfaces that improve the separation of photogenerated charge carriers. The well-defined ZnO/ZnFe2O4 inverse opal displays a high photoconversion efficiency of 0.81% at 0.38 V versus the RHE without any co-catalyst assistance, which is over 6 times higher than that of the pristine ZnO sample (0.13% at 0.65 V vs. the RHE). Furthermore, the photoanode is quite stable even after 10 h of continuous illumination with a slight photocurrent decay of 4.9% (88.0% loss for the pristine ZnO). The high performances of the ZnO/ZnFe2O4 inverse opals can be attributed to the improved interfacial charge carrier separation based on electrochemical analysis and first-principles calculations. This work may provide more insights into the design of highly efficient photoanodes for photoelectrochemical applications.
研究领域:
材料科学
·
光电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 11
·8581-8590
·
IF 3.442
Huang Xie-Jun,Zeng Xiao-Fei,Wang Jie-Xin,Zhang Liang-Liang,Chen Jian-Feng
Transparent ZnO/polymer nanocomposites with good UV shielding performance have shown great potential applications. Due to the photocatalytic activity of ZnO, core–shell structure nanoparticles (NPs) have been used to fabricate the transparent polymer-based nanocomposites. However, it is still a challenge to synthesize core–shell structure NPs with small particle size and good dispersity, and difficult to maintain the transparency of the nanocomposites because of Rayleigh scattering caused by the big size or the aggregation of NPs. This article reports a novel reverse microemulsion combined with surface modification method for the synthesis of monodispersed silica-coated ZnO (ZnO@SiO 2 ) NPs, which are introduced into ethocel (EC) matrix to fabricate the transparent nanocomposites by the solution-mixing method. The ZnO@SiO 2 NPs with an average size of 12 nm have an obvious core–shell structure and show excellent monodispersity in toluene. The as-prepared EC/ZnO@SiO 2 nanocomposites shield all the UV light completely under 350 nm and maintain the transparency of pure EC even the solid content reaches 60 parts per hundred of EC resin by weight (phr). Importantly, the photocatalytic activity of ZnO NPs is eliminated thoroughly by the silica shell, which apparently improves the UV aging resistance of polymer (EC), enabling the applications of ZnO as durable and environmental friendly UV blocker in transparent plastics and coatings to extend the lifetime of the products.
研究领域:
材料科学
·
纳米技术
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2022
·Vol. 24
·期 12
·1-14
·
IF 2.533
Lu Junfeng,Li Donglin,Chen Xianjia,Peng Xiaolin,Li Jing,Yang Yanting,Hong Bo,Wang Xinqing,Jin Dingfeng,Jin Hongxiao
Here, we demonstrate room temperature NO 2 sensors based on ZnO/rGO nanocomposites by a facile hydrothermal method. The ZnO nanoparticles (20 ~ 50 nm) were wrapped by film-like rGO with different contents (0.5, 1.0, 2.0, 3.0 wt %). They all exhibit p-type sensing toward NO 2 at room temperature. The content of rGO shows an obvious effect on the sensing properties. The ZnO NPs-1% rGO has a high response of 5.21 to 10 ppm NO 2 with a response/recovery time of 198/144 s. The sensing mechanism is discussed. The gas-sensitive properties are derived from the strong synergistic effect between the smaller particles of ZnO and rGO.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yanning Qu,Xiaojian Xu,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
ZnO is widely used as a photocatalyst in industry, however, it is still a challenge to degrade refractory antibiotics in water. In this study, a novel surface-functionalized N,S-doped carbon quantum dot (N,S-CQD) was synthesized and embedded into ZnO for the formation of a new ZnO/N,S-CQDs hybrid nanoflower via one-pot hydrothermal process. The as-prepared ZnO/N,S-CQDs showed significantly enhanced photocatalytic activity under visible and near-infrared (NIR) light irradiation, in which 72.8% of MG was decomposed after 180 min under NIR light. In addition, approximately 92.9% and 85.8% of ciprofloxacin (CIP) were degraded by ZnO/N,S-CQDs under simulated sunlight for 20 min and natural sunlight for 50 min, respectively. Furthermore, the mechanism was investigated and the results show that the surface functionalization, electron transfer, up-converted luminescence properties of N,S-CQDs, together with the highly reactive facets of ZnO nanoflowers, made great contributions to the enhanced photocatalytic activity of ZnO/N,S-CQDs. Additionally, the results of active species trapping experiments indicated that the hydroxide free radicals, holes and superoxide radical anions all played certain roles in the photocatalytic reaction. Finally, ZnO/N,S-CQDs was employed for photodegradation of antibiotics in actual water, the degradation efficiency of antibiotics still remained above 60% after 120 min. We believe that the ZnO/N,S-CQDs nanoflower is a promising photocatalyst for the degradation of refractory antibiotics under sunlight irradiation. The relatively low cost and excellent photocatalytic performance of ZnO/N,S-CQDs is beneficial for industrial applications.
研究领域:
环境科学
·
材料科学
·
光催化技术
✓ 已验证
DOI
高影响因子
Current Nanoscience
·
2024
·Vol. 20
·期 4
·543-553
·
IF 1.4
Liu Yurong,Zeng Xiaolong,Zhu Lin,Wang Cong,Geng Kuiwei,Yao Ruohe
Background: The development of high-performance piezoelectric pressure sensors with outstanding sensitivity, good linearity, flexibility, durability, and biocompatibility is of great significance for smart robotics, human healthcare devices, smart sensors, and electronic skin. Thus,
considerable progress has been achieved in enhancing the piezoelectric property of PVDF-TrFEbased composite pressure sensors by adding various ZnO nanostructures in PVDF-TrFE polymer acting as a nucleating agent and dielectric material. Aims: In this work, flexible pressure sensors with
a sandwich structure based on PVDFTrFE/ nano-ZnO composite sensing film were fabricated using a simple spin-coating method and post-annealing process, while electrospinning and high-voltage polarization processes were not adopted. Methods: Poly (vinylidene fluoride-trifluoroethylene) (PVDF-TrFE)/nano-ZnO
composite films were prepared via spin coating to fabricate flexible piezoelectric pressure sensors. ZnO nanoparticles (ZnO NPs), tetrapod ZnO (T-ZnO) and ZnO nanorods (ZnO NRs) were used as nano-fillers for piezoelectric PVDF-TrFE, to enhance the beta-crystal ratio as well as the crystallinity
of PVDF-TrFE. The structural and surface morphologies of the composite films were investigated using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results: Among three different types of ZnO nanostructures with a concentration
range (0-7.5 wt%), the sensor with 0.75 wt% ZnO NRs nanofiller exhibits a maximum output voltage of 1.73 V under an external pressure of 3 N and a maximum sensitivity of 586.3 mV/N at the range of 0-3 N. Further, the sensor can generate a clear piezoelectric voltage under bending and twisting
deformation as well as compression and tensile deformation. Conclusion: To summarize, the addition of different concentrations of nano-ZnO can remarkably improve the piezoelectric performance of the composite sensor, and ZnO NRs can achieve better piezoelectric properties of the sensor
as compared to ZnO NPs and T-ZnO. In addition, the sensor with 0.75 wt% ZnO NRs as nanofiller has the highest piezoelectric response, which is about 2.4 times that of the pure PVDF-TrFE sensor. It is demonstrated that the sensor has great potential applications in wearable health monitoring
systems and mechanical stress measurement electronics.
研究领域:
材料科学
·
传感器技术
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 26
·6371-6379
·
IF 5.066
Shuyuan Cui,Zhigao Dai,Qingyong Tian,Jun Liu,Xiangheng Xiao,Changzhong Jiang,Wei Wu,Vellaisamy A. L. Roy
Three-dimensional (3D) ZnO/Ag nanowire arrays (NWA) SERS substrates are fabricated by a screen-printing technique. The preparation of patterned ZnO NWA involves a two-step growth process. The ZnO nanoparticles-based ink is prepared and printed as seed layers, which are used as templates to fabricate patterned ZnO NWA via a hydrothermal method. During the screen printing process, the patterns of ZnO NWA are controlled by printing plates. The as-obtained NWA with uniform morphology was fabricated at 90 °C and exhibits hydrophilic and lipophilic properties. Subsequently, the sensitive 3D SERS substrates are fabricated through deposition of Ag nanoparticles (NPs) onto the surface of patterned ZnO NWA by magnetron sputtering. The detection limit of Malachite green (MG) can achieve 10−12 M with an enhancement factor of about 2.5 × 1010. Combined with the sensitivity and uniformity, the ZnO/Ag NWA is applied for the quick detection of low concentrations of molecules related to food safety, such as amoxicillin.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Huaxing Song,Geqian Fang,Zhaohua Gao,Yang Su,Xiaorui Yan,Jian Lin,Wenhua Wang,Wanzhong Ren,Haisheng Wei
Supported metal catalysts play a significant role in heterogeneous catalysis in liquid phase reaction systems, but they usually suffer from a stability problem. Encapsulation of active metal species without the compromise of catalytic performance has been considered as an effective strategy. Here, we report an ultrastable Ru-based catalyst with particle size of around 1.1 nm for selective hydrogenation reaction. The highly dispersed Ru species are covered by the in situ formed porous N–C–ZnO overlayer, which is induced through the transforming of ZIF-8 shell that derives from a ZnO substrate. The resulting Ru/ZnO@N–C–ZnO catalyst can exhibit good stability in the hydrogenation of p-chloronitrobenzene after 20 cyclic runs with 100% selectivity toward p-chloroaniline. Comparatively, the naked Ru/ZnO catalyst with larger Ru particles shows serious metal leaching issue with inferior stability and poor selectivity. It is revealed that the excellent performance of Ru/ZnO@N–C–ZnO is attributed to the porous overlayer, which strengthens the bonding of Ru nanoparticles on ZnO.
研究领域:
催化
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2019
·
IF 2.752
Wen Cui,Xiaoli Kang,Xiaoying Zhang,Xudong Cui
A highly efficient Rhodamine B (RhB) adsorbent based on a gel-like ZnO/Zr-metal-organic framework (ZnO/Zr-MOF) composite was prepared by reacting ZnO nanoparticles with glacial-acetic-acid-modulated Zr-MOF(bpy) via a sample solvothermal method. Introduction of ZnO greatly improved the texture properties of the parent Zr-MOF(bpy), and the resulting material exhibited an agglomerate morphology consisting of numerous quadrate nanoparticles, which is quite different from the cubo-polyhedron morphology of Zr-MOF(bpy). In this way, this composite showed a considerable RhB absorption capacity from aqueous solution in a wide pH range. The adsorption kinetics , isotherms and thermodynamics of the RhB adsorption by ZnO/Zr-MOF(bpy) were discussed and confirmed that this adsorption process satisfied pseudo-second-order kinetics and the Langmuir model, and was a spontaneous exothermic process. Moreover, the excellent adsorption performance is likely related to the synergism of hydrogen bonding , electrostatic interactions and π–π interactions between the ZnO/Zr-MOF(bpy) nanocomposite and RhB. The excellent texture properties of ZnO/Zr-MOF(bpy) promote the adsorption and diffusion of RhB on it, which is also crucial during the adsorption process.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
MATERIALS TECHNOLOGY
·
2020
·
IF 1.738
Yusong Pan,Minyuan Yin,Hongjun Fang,Linfeng Xu,Haixian Yan,Chengling Pan
A novel ternary ZnO/CdS/GO heterostructure with boosting photocatalytic performance and stability was prepared by a simple hydrothermal method. The morphology, crystal structure, chemical composition and optical properties of the composite were thoroughly investigated. Results show that the obtained ZnO/2CdS/10GO composite exhibits the optimal activity towards RhB removal under sunlight irradiation, which is higher than that of pristine ZnO and CdS. The enhanced photocatalytic performance of the composite is attributed to the close heterostructure and excellent conductivity of GO. Besides, the radical trapping experiments revealed that superoxide radical (•O2−) and holes (h+) were the vital active species in the photocatalytic process. Meanwhile, the corresponding photocatalytic mechanism was also investigated. In all, this work supplies a facile route to design highly efficient and stable photocatalysts for water purification.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jing Li,Lixin Chen,Zhe Hua,Baodan Liu
Gallium-zinc oxynitride solid solution has been considered as a promising candidate material for photoelectrochemical (PEC) water splitting. However, its PEC performance is severely limited by the poor charge separation efficiency and the adverse intrinsic vacancy defects . Herein, to solve these problems, we developed a novel strategy for constructing dendritic (GaN) 1-x (ZnO) x /GaN arrays with type-Ⅱ heterojunction on a conductive GaN crystalline substrate by an Au-assisted chemical vapor deposition method. Then, an additional annealing treatment in Ar is carried out to further decrease the density of surface oxygen vacancy and to increase the density of O N -V Ga vacancy complexes for enhancing photoelectrochemical performance. Under the synergistic effect of type-Ⅱ heterojunction and vacancy modulation, the optimized (GaN) 1-x (ZnO) x /GaN photoanode exhibits a photocurrent density of 0.25 mA cm −2 at 1.23 V vs. RHE and the surface modification with CoPi co-catalyst can further increase the photocurrent density to 0.45 mA cm −2 at 1.23 V vs. RHE. It is demonstrated that the O N -V Ga vacancy complexes are beneficial to increase the PEC performance of gallium zinc oxynitrides.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）