JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Hang-bo Zheng,Di Wu,Yuan-li Wang,Xiao-pan Liu,Peng-zhao Gao,Wei Liu,Jin Wen,Evgeny V. Rebrov
A new approach was proposed for the preparation of metal–organic framework/metal oxide composites in one step using only metal salts. Here, crystalline rhombohedral dodecahedron ZIF-8, hollow ZnO microsphere , and ZIF-8/ZnO composites were obtained in different one-pot solvothermal processes where the growth toward individual ZIF-8 and ZnO phases and toward ZIF-8/ZnO composites was controlled by adjusting the ratio of metal salts to 2-methylimidazole. Subsequently, a series of derived (C and/or N)-doped ZnO nanoparticles was obtained by a two-step calcination process. The absorption kinetics and photocatalytic activity in methyl orange degradation under visible light were investigated. ZIF-8-derived ZnO could maintain their original morphology and displayed excellent photocatalytic activity 10 times higher than that of the original ZIF-8.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2019
·Vol. 35
·期 5
·924-928
·
IF 1.071
Xiang Siyuan,Meng Qingnan,Zhang Kai,Gu Yue,Liu Wendong,Yang Bai
Using dextran as both reductant and stabilizing agent, nanopetals(ZnO-Au NPs) were easily synthesized and possessed a petal-like morphology. The feature structure and size of such ZnO-Au NPs were adjustable by regulating the amount of chloroauric acid(HAuCl 4 ). Moreover, the electrochemical property of the obtained NPs was evaluated by being immobilized on the glassy carbon electrode(GCE), which performed both high sensitivity and stability in dopamine(DA) determinations. Furthermore, the as-prepared ZnO-Au NPs could also detect DA and uric acid(UA) simultaneously in the mixture without interference, indicating good selectivity and showing promising potential in biosensing.
研究领域:
材料科学
·
生物传感
·
分析化学
✓ 已验证
DOI
高影响因子
Arabian Journal of Chemistry
·
2024
·
IF 5.3
Jiyun Gao,Youyou Yin,Yongjing Guo,Lijuan Jia,Futing Xia,Chenhui Liu,Ming Hou,Fang Wang
NO 2 is a toxic gas that poses a significant threat to the environment and human health. In this work, one-dimensional ZnO nanowires and two-dimensional layered titanium carbide (Ti 3 C 2 T x ) have been prepared by hydrothermal and selective chemical etching methods, respectively. The Ti 3 C 2 T x /ZnO composites are synthesized by electrostatic self-assembly method. The characterization results indicate that the ZnO nanowires are uniformly dispersed on the surface of layered Ti 3 C 2 T x to form a heterostructure. Meanwhile, the gas sensitive performance of Ti 3 C 2 T x /ZnO composite material is investigated and compared with that of pure Ti 3 C 2 T x . The results reveal that the composite exhibits a high selectivity as well as sensitivity with a response value (S = Rg/Ra) of 18.66 to 100 ppm NO 2 at 250 ℃, which is 4.3 times higher than that of pure Ti 3 C 2 T x . This proves that the prepared composite material is an effective sensing material for detecting NO 2 gas.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2015
·
IF 2.489
Guangxia Cao,Hanjia Yang,Kunquan Hong,Wenjia Hu,Mingxiang Xu
Aligned zinc oxide/zinc sulfide core–shell nanowire arrays are synthesized on transparent conductive oxide (TCO) glass substrate by sulfurizing ZnO nanowires using a vapor phase method. The length of these nanowires is about 7.3 μm with diameter of ~100 nm. The thickness of the ZnS shell can be controlled by adjusting the reaction time. It is found that the shell layer is well crystallized with preferring growth direction of ZnS [002]. The result indicates that when used to decompose methyl orange (MO), the core–shell nanowire arrays have superior photocatalytic performance under UV-light irradiation, which shows considerable potential applications of this nanocomposite in water purification.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Wen-Jie Wu,Qi Zhao,Rui Zhou,Ya-Chuan Liang,Wen-Bo Zhao,Chong-Xin Shan
An europium functionalized ZnO quantum dots (QDs) ratiometric fluorescent nanoprobe is designed to establish a real time, on-site visual, and highly sensitive probe method for tetracycline (TC). The yellow-emitting ZnO QDs serves as the internal reference, while the Eu 3+ chelated on the surface of ZnO QDs is used as the signal reporting unit. This nanoprobe exhibits rapid response, excellent selectivity, and high sensitivity with a detection limit of 4 nM in detecting the levels of TC. In addition, fluorescence of the nanoprobe can change from yellow to red as the concentration of TC increases. Thus, naked eye detection of TC was realized using the test paper processed by nanoprobe, followed by RGB value analysis function on the mobile phone APP.
研究领域:
分析化学
·
纳米技术
·
环境科学
·
生物技术
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2023
·Vol. 224
·期 13
·2300067
·
IF 2.5
Bin Wang,Yunfeng Wu,Xiangmei Ma,Zhehao Dong
Zinc oxide (ZnO) is widely used as an excellent UV absorbent to improve UV-shielding ability. However, its photocatalytic activity is high, and the UV absorption region and dispersibility within the polymer are poor, which limits the application. This work is based on the design of ZnO nanoparticles via the coating of hydroxyapatite (HA) and (3-aminopropyl) triethoxysilane (KH550), then it is compounded with polyvinyl chloride (PVC). X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), high-resolution transmission electron microscopy (HRTE), and UV spectrophotometer are used to analyze the microstructure and properties. The results show that the composite films have good UV-shielding abilities and help reduce the damage of PVC upon exposure or heat. Therefore, this work provides new means to make PVC composites with superior UV-shielding properties, and the tensile strength at the break of PVC film blended with ZnO@HA/KH550 is effectively improved, which is due to good compatibility between ZnO@HA/KH550 and PVC matrix.
研究领域:
材料科学
·
高分子化学
·
纳米技术
✓ 已验证
DOI
高影响因子
TALANTA
·
2013
·
IF 3.498
Di Zhao,Hongjie Song,Liying Hao,Xing Liu,Lichun Zhang,Yi Lv
Water-soluble and luminescent ZnO quantum dots (QDs) capped by (3-aminopropyl) triethoxysilane (APTES) are environment-friendly with strong photoluminescence (max. wavelength: 530 nm). Interestingly, it was found that the fluorescence could be quenched by dopamine (DA) directly. On the basis of above, a novel ZnO QDs based fluorescent probe has been successfully designed to detect DA with high selectivity and sensitivity. Moreover, the possible fluorescence quenching mechanism was proposed, which showed that the quenching effect may be caused by the electron transfer from ZnO QDs to oxidized dopamine–quinone. Under optimum conditions, the relative fluorescence intensity was linearly proportional to the concentration of DA within the range from 0.05 to 10 μM, with the detection limit down to 12 nM ( n =3). Also, the selectivity experiment indicated the probe had a high selectivity for DA over a number of possible interfering species. Finally, this method was successfully used to detect DA in serum samples with quantitative recoveries (99–110%). With excellent selectivity and high sensitivity, it is believed that the ZnO QDs based fluorescent probe has a potential for the practical application in clinical analysis.
研究领域:
分析化学
·
生物化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 63
·58452-58457
·
IF 3.289
Minghui Wang,Liying Cui,Songyang Li,Zhuoxin Li,Tianliang Ma,Guoyou Luan,Wei Liu,Fanli Zhang
Hollow nano-tubes of TiO2 and TiO2@ZnO hybrids were produced by a facile and mild approach combining an electrospinning technique and soaking method, followed by calcination. During the synthesis process, the electrospinning procedure provides the templates for the fabrication of hollow nano-tubes by producing the PS fibres, which are porous and enable the immobilization of amorphous TiO2 through the soaking method. After that, the composite fibers of TiO2/PS and TiO2@ZnO/PS were calcined into pure TiO2 and TiO2@ZnO tubes after the complete combustion of organic materials. The samples were then characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD). Ultimately, the photocatalytic performance of the hybrids was evaluated from the degradation of methylene blue (MB), where they exhibited excellent photocatalytic activity. The proposed mechanism for the enhanced photocatalytic efficiency of the samples is explained at the end of the paper. In principle, the approach to the fabrication of TiO2 tubes is demonstrated to be an effective and robust strategy to fabricate long and uniform metal-oxide micro-nano tubes on a large scale.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2020
·
IF 2.463
Jing Liu,Weiyan Sun,Jie Bai,Chunping Li
Nitrogen-enriched carbon nanofibers carried Sn and Zn bimetallic composites with outstanding storage capacity and superior mechanical strength were facilely fabricated by electrospinning technology, amidoximation reaction modified polymer fiber, ion coordination technique introduced Zn 2+ and carbonization of composite nanofibers. The introduction of amidoxime groups not only enhanced the coordination ability with Zn 2+ , but also increased the content of nitrogen element. In addition, due to the different thermal stability of amidoxime groups, the regulation of different types of nitrogen content can be achieved by changing the carbonization temperature, and the influence of nitrogen on the electrochemical performance was explained. At the same time, due to the role of carbothermal reduction , tin in different valence ratios was obtained and its contribution to the energy storage performance of supercapacitors was explored. Benefiting from high nitrogen-enriched level, mutation between Sn 2+ and Sn 4+ oxidation state and synergistic mechanism of ZnO-SnO x bimetal, the prepared composite had a high specific capacitance of 810.89 F g −1 at a current density of 0.5 A g −1 , outstanding cycling stability of 119% over 5000 cycles in 4 M KOH electrolyte. What’s more, we conducted a two-electrode test with the energy density of 50 Wh kg −1 at a power density of 374 W kg −1 . In consequence, this novel design is believed to have great potential in high energy and power density of energy storage devices in the future.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaoqian Meng,Rui Gao,Ming Zheng,Xin Zhou,Xianfa Zhang,Xiaoli Cheng,Yingming Xu,Shan Gao,Lihua Huo
Real-time monitoring of chlorine gas (Cl 2 ) with a strong irritating odor is an indispensable means of avoiding its contamination of the air and harm to the body. To achieve this purpose, a novel gas-sensitive material capable of detecting low concentrations of Cl 2 at near room temperature is developed in this paper. ZIF-8 with a kinetic diameter of 3.4 Å in the designed ZnO@ZIF-8 composites is able to sieve gas molecules with different kinetic diameters, enabling effective improvement of the selectivity of the gas-sensitive materials. In addition, the porous structure of ZIF-8 can provide more reactive sites, which is conducive to improving gas adsorption capacity and providing of channels for gas diffusion. In this study, ZnO@ZIF-8 heterojunction composites are prepared by combining the advantages of ZnO and ZIF-8, which provides a new method for real-time monitoring of low concentrations of Cl 2 , and also has potential practical applications in fields such as environmental monitoring and industrial safety.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Mei Cai,Chao He,Hulei Yu,Anze Shui
The construction of heterojunction for photocatalysis has garnered much research interest. Herein, we report the successful fabrication of a ternary dual S-scheme ZnO/ZnS/In 2 S 3 heterojunction with a higher photocatalytic capacity via a hydrothermal method . Specifically, the optimized ternary heterojunction ZSI0.35 sample achieves the 100 % photodegradation efficiency of RhB (10 mg/L, 50 mL) within 10 min, approximately 17 and 8 times higher than pure ZnO and ZnO/ZnS binary heterojunction, respectively. Further characterization results confirm the dual S-scheme heterojunction structure in the fabricated ZnO/ZnS/In 2 S 3 ternary heterojunction, and the improvement of photocatalytic properties can be attributed to the enhanced Brunauer Emmett-Teller (BET) surface area, the improved redox capacity of the photocatalyst, and the quick charge transfer. Additionally, the possible photocatalytic mechanism is discussed according to the measurements. This work provides an efficient strategy of promising heterojunction photocatalysts for photocatalytic environmental remediation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Chen Pengfei,Li Jin
SnO 2 quantum dots, ranging from 10 to 30%, were combined with ZnO nanosheets to create a heterojunction photocatalyst. This composite was generated using a basic hydrothermal method, which was then followed by high-temperature calcination to enhance the photocatalytic activity of ZnO. The results showed that the synthesized SnO 2 nanoparticles with tetragonal rutile phase and ZnO nanosheets with hexagonal fibrillar zincite phase, the coupling of SnO 2 quantum dots and ZnO nanosheets improved the separation efficiency of the photogenerated carriers, and at the same time broadened the photoresponse range. Through the degradation of the organic dye Rhodamine B (RhB), the best photocatalytic activity was found at 20% amount of SnO 2 in the composite sample (SZ-2), and the degradation efficiency of RhB reached 96.5% at the light irradiation time of 100 min. In addition, an in-depth study of the photocatalytic mechanism of the constructed heterojunction by active group trapping experiments, and the results showed that •O 2 − and h + were the main active substances in this degradation system. Meanwhile, the SZ-2 photocatalyst was tested for five cycles, and the degradation efficiency of the 5th cycle was 72%. The cycle test indicates that the SZ-2 sample is highly stable and reusable. Therefore, the results showed that the prepared SnO 2 /ZnO heterojunction photocatalysts are suitable materials for degrading organic dyes.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）