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.
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DOI
PubMed
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2023
·Vol. 57
·期 12
·125301
·
IF 3.4
Maira Liaqat,Sayyam Ahsan,Tahir Iqbal,Sumera Afsheen,Rana Rashad Mahmood Khan,Nabil Al-Zaqri,Adel El-Marghany,Ismail Warad
This study reports the efficient synthesis and thorough characterization of novel graphene doped {\text{BiV}}{{\text{O}}_4}/{\text{ZnO}} nanocomposites. Among these doping percentages, 3% BVZO/G is optimized composite as it shows the highest photocatalytic performance i–e 98% and 95% among all the doping percentages. Under the visible light exposure\left( {\lambda \unicode{x2A7E} 420\,{\text{nm}}} \right), the decomposition of tetracycline (TC) and methylene blue has been studied to evaluate the photocatalytic activity of the prepared composites. The characterization techniques such as photoluminescence spectroscopy, UV visible (UV-Vis) spectroscopy, x-ray diffraction, scanning electron microscopy, and Fourier transform infrared have been used to investigate the optical, structural, morphological, and vibrational properties respectively. The findings of the research indicate that the doping of graphene resulted in enhanced absorption of visible light and efficient mitigation of charge carrier recombination. To check the stability of optimized photocatalyst, reusability test has been performed. Additionally, role of active species has been examined using different scavengers in trapping experiment. By understanding the composite material for the enhanced photocatalysis, the results of this research help to design a sustainable and efficient photocatalyst.
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高影响因子
Cell Reports Physical Science
·
2022
·
IF 7.832
Yingdong Hao,Fang Mao,Jialin Shi,Yonghui Zhao,Luozhen Jiang,Nannan Sun,Lina Li,Wei Wei
New catalysts and product diversification of direct CH 4 conversion remain very challenging in catalysis. Here, we report FeO x /ZnO photo-catalysts for the conversion of CH 4 to liquid oxygenates with high yield (4,108 μmol·g cat −1 ·h −1 ) and nearly 100% selectivity. Based on the combinative results from X-ray photoelectron spectroscopy, X-ray absorption, electron paramagnetic resonance, radical quenching, and theoretical calculations, it is found that, in addition to the activation of CH 4 in the liquid phase, the presence of highly dispersed FeO 3 motifs in the ZnO lattice facilitates the formation of surface-active O − species; this plays an effective role for CH 4 activation to · CH 3 radicals. Meanwhile, HCHO is obtained as the major product in our system, rather than the typically reported CH 3 OH, and this may offer new opportunities to extend the product structure of CH 4 upgrading via tandem catalysis.
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高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 2
·026401
·
IF 1.929
Guoyong Liu,Yuan Yuan,Zhou Jiang,Jiang Youdong,Wang Liang
Superhydrophobic (SHP) surfaces had promising application in anti-icing field. In this work, ZnO SHP surfaces were prepared on aluminum alloy by radio frequency (RF) magnetron sputtering. The structure, chemical composition, morphology, wettability of the SHP surfaces were investigated by using corresponding methods. The anti-frosting/anti-icing performance of the ZnO SHP surfaces were investigated. Morphology of surfaces showed that sputtering time affected the surface morphology of the ZnO surfaces. When the sputtering time was 15 min, the rough structure exhibited excellent anti-frosting/anti-icing property due to the exceptional superhydrophobicity and self-transfer behavior at subzero temperature, which composed by densely gathered nanoclusters. The freezing of water droplets was delayed for about 2 h, and frosting was delayed for approximately 5 h at the temperature of −10 °C. The SHP surfaces could efficiently enhance the anti-icing property in glaze ice. Meanwhile, the as-prepared ZnO SHP surfaces displayed a low ice-adhesion strength of 12 ± 4.7 kPa. However, the structure with large undulation and pore space reduced the anti-frosting/anti-icing property of the SHP surface. This work provided a direction for the design and preparation of anti-icing surfaces for power transmission lines.
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高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Ya-Nan Zhang,Bo Li,Lin Fu,Qun Li,Long-Wei Yin
We adopt Metal-Organic-Framework (MOF)-derived zinc oxide (ZnO) as electron extraction material for hybrid cationic perovskite solar cells for the first time, breaking the prevailing paradigm of using oxides nanoparticle as electron extraction layer. MOF-derived ZnO with a polyhedral morphology and abundant internal porous structure can increase light harvesting ability and optimize the interfacial contact with perovskite . In contrast to conventional ZnO nanoparticles , the introduction of MOF-derived ZnO will achieve more efficient electron extraction, reduction of trapped state density and lower electron-hole recombination probability, thus significantly increase the fill factor and short-circuit current density of the cells. MOF-derived ZnO based perovskite solar cells exhibit a champion power conversion efficiency of 18.1% coupled with improved fill factor of 0.74 and short-circuit current density of 22.1 mA cm −2 . Simultaneously, there is almost no hysteresis effect , and performance attenuation of the device in the ambient atmosphere over time can be suppressed. The performance improvement of perovskite solar cells stems from improved light harvesting efficiency in a wide wavelength range, as well as enhanced carrier extraction efficiency resulted from the increase of interface area between MOF-derived ZnO and perovskites.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Tao Tang,Chengcai Li,Wenyu He,Wei Hong,Hailin Zhu,Guojin Liu,Yuan Yu,Caihong Lei
In this paper, the ZIF-8/ZnO mixture was sintered at high temperature to prepare C-ZnO composite nano-particles with excellent photocatalytic degradation ability under ultraviolet light , and then blended with PVDF to fabricate PVDF composite membrane with capabilities of photocatalytic degradation of methylene blue(MB) via solution phase conversion. The results show that the photocatalytic performance of the prepared C-ZnO composite particles was the best when the ZIF-8/ZnO mass ratio was 1:2, and the photocatalytic degradation efficiency of the PVDF composite film prepared was as high as 95.02% when the composite particle content was 15%. The photocatalytic activity of C-ZnO composite material benefits from the synergy between the two. Moreover, the efficiency of photodegradation of MB remained above 90% after the composite membrane was subjected to five cycles of experiments, which solved the problem that the traditional photocatalyst was difficult to recycle. In addition, it is found that O 2 - plays a major role in the photocatalytic degradation of MB through free radical capture experiments. All in all, the PVDF composite membrane containing C-ZnO composite particles has a foreseeable potential in the field of photocatalytic printing and dyeing wastewater in the future.
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高影响因子
ELECTROANALYSIS
·
2023
·Vol. 36
·期 2
·e202300237
·
IF 3
Toleshi Teshome,Shimeles Addisu Kitte,Abera Gure,Guta Gonfa
The co-precipitation approach was employed in this study to create Fe doped ZnO (Fe-ZnO) nanoparticles (NPs). To characterize the synthesized NPs, Ultra violet-Visible (UV-Vis) spectroscopy, X-ray diffraction (XRD), fourier transform infrared (FT-IR), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) were used. Here, a novel electrochemical approach for the detection of tryptophan (Trp) using a glassy carbon electrode modified with Fe-ZnO NPs (Fe-ZnO/GCE) is demonstrated. The research findings revealed that Fe-ZnO/GCE enhanced the electron transfer rate of Trp oxidation. The sensitivity of Trp detection using Fe-ZnO/GCE in phosphate buffer solution (PBS) at pH 64.0 was significantly improved compared to bare GCE due to the electrocatalytic activity of Fe-ZnO NPs. Fe-ZnO/GCE exhibited a linear response with Trp concentrations ranging from 0.1 to 150 μM with the limit of detection (LOD) is 0.089 μM (3σ /m ) and limit of quantification (LOQ) about 0.3 μM (10σ /m ) using linear sweep voltammetry (LSV). The Fe-ZnO/GCE sensor was also effectively used to detect Trp in African catfish and multivitamin tablets. Trp analysis in real samples exhibited good recovery values of 89.60 to 99.15 %, demonstrating the accuracy and practicality of the method.
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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.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Mengfeifei Jin,Weijie Zhou,Wenqiang Ma,Qin Wang,Xiaojuan Liang,Peiqing Zhang,Weidong Xiang
In the era of big data, the large amount of data generated every second requires modern and advanced data storage technologies. Femtosecond (fs) laser induced crystallization allow for the realization of fixed-point crystallization inside the CsPbBr 3 nanocrystals glasses (CPB), which can be applied in data storage. However, CPB is prone to self-crystallization prior to further heat treatment, interfering with fs-induced crystallization inside the glass and seriously hindering its application in data storage. Herein, we first propose the inhibition of CPB from self-crystallization by modulating the content of ZnO (4–20 mol%) using a melt-quenching method. ZnO was employed as a network modifier and was closely related to the glass network structure. When the content of ZnO was 4%, the CPB did not self-crystallize and was colorless. It was applied in the rewritable data storage by combining the 800 nm fs laser-induced crystallization, annealing (460 ℃/0.5 h) and fs laser erasing (20 mW). This work demonstrates a simple and efficient way to control the self-crystallization of CPBs, enhancing their potential practical application in high-capacity optical data storage with ultra-long working lifetimes.
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高影响因子
APL Materials
·
2015
·Vol. 3
·期 10
·
IF 2.789
Wang Lizhong,Ouyang Shuxin,Ren Bofan,Ye Jinhua,Wang Defa
Macroporous GaN/ZnO solid solution photocatalyst is synthesized through a novel sol-gel method under mild conditions. The performance of as-synthesized solid solution photocatalyst is evaluated for decomposition of gaseous 2-propanol (IPA). It is found that due to enhancement in both the adsorption to gaseous IPA and the absorbance to visible light, the porous GaN/ZnO solid solution exhibits a good photocatalytic performance for IPA decomposition. Moreover, the mechanism for photocatalytic degradation IPA over porous GaN/ZnO solid solution is also investigated in comparison with those for the two end materials ZnO and GaN. The trapping effects with different scavengers prove that both the photoexcited electrons and holes affect the IPA photodegradation process, simultaneously.
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高影响因子
Agriculture-Basel
·
2022
·Vol. 12
·期 2
·204
·
IF 3.408
Chi Zhang,Congcong Du,Wei Liu,Ting Guo,Ying Zhou,Hongyuan Zhou,Yuhao Zhang,Xiaozhu Liu,Liang Ma
In this paper, an electrochemical biosensor was established for the high-sensitivity detection of Tenuazonic acid (TeA) in fruits based on the enrichment of flower-shaped nano-ZnO and the specific recognition of immune response. Herein flower-shaped nano-ZnO (ZnO NFs) with a hexagonal wurtzite structure and diameter of 700–800 nm were demonstrated to have the optimal specific surface area and outstanding conductivity, compared with different morphology, sizes, and crystal structures of nano-ZnO. Second, the ZnO NFs were used as carriers for efficiently immobilizing monoclonal antibodies to obtain antibody bioconjugates, which were anchored on the 2-mercaptobenzoic acid-modified gold electrode by amide reaction. In the presence of TeA, the monoclonal antibody could specifically recognize and bind to it, resulting in a decrease in electron transfer ability on the gold electrode surface. Finally, the electrochemical biosensor showed a range from 5 × 10−5μg/mL to 5 × 10−1μg/mL with a detection limit of 1.14 × 10−5μg/mL. Furthermore, it exhibited high selectivity for TeA among other analogs, such as Altenuene (ALT) and Alternariol (AOH). Notably, the proposed strategy could be employed to monitor TeA in tomato and citrus, showing potential application prospects in practical application and commercial value.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yumeng Liu,Jinniu Zhang,Gang Li,Jia Liu,Qingfei Liang,Hongjun Wang,Yuanyuan Zhu,Jianzhi Gao,Hongbing Lu
In 2 O 3 –ZnO nanotubes were prepared by a solvent thermal method using electrospun indium nitrate–polyvinyl pyrrolidone [In(NO 3 ) 3 –PVP] nanofibers as a sacrificial template. The sensing properties toward NO 2 of this kind of new emerging sensing material were explored. Compared with as-electrospun In 2 O 3 nanofibers, the In 2 O 3 –ZnO composite nanotubes exhibited higher responses and better selectivity to NO 2 . The response of the In 2 O 3 –ZnO nanotubes to 500 ppb NO 2 at room temperature (RT, 25 °C) under UV irradiation was as high as to 32.73, which was 3.33 times higher than that of the In 2 O 3 nanofibers. Moreover, even under a high relative humidity of 80%, the RT NO 2 response of the In 2 O 3 –ZnO composite nanotubes can still reach up to 3.50–500 ppb. The enhanced NO 2 sensing characteristics were mainly ascribed to the formation of In 2 O 3 –ZnO n–n heterojunctions , the enhanced light absorption, and the increased oxygen vacancy proportion. The results suggested that In 2 O 3 –ZnO nanotubes had good potential for the selective and sensitive detection of ppb-level NO 2 at RT.
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高影响因子
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