Progress in Natural Science-Materials International
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2013
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IF 0.989
Ahmat Ali,Ruxangul Jamal,Weiwei shao,Adalet Rahman,Yakupjan Osman,Tursun Abdiryim
Poly(3,4-propylenedioxythiophene)/nano-Zinic Oxide (PProDOT/ZnO) composites with the content of 3–7 wt% nano-ZnO were synthesized by the solid-state method with FeCl 3 as oxidant. The structure and morphology of the composites were characterized by Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visible (UV–vis) absorption spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrochemical performances of the composites were investigated by galvanostatic charge–discharge, cyclic voltammetry and electrochemical impedance spectroscopy (EIS). The photocatalytic activities of the composites were investigated by the degradation of methylene blue (MB) dyes in aqueous medium under UV light irradiation. The results from FTIR and UV–vis spectra showed that the PProDOT/ZnO composites were successfully synthesized by solid-state method, and nano-ZnO had great influences on the conjugation length and oxidation degree of the polymers. Furthermore, the PProDOT/5 wt%ZnO had the highest conjugation and oxidation degree among the composites. The results of XRD analysis indicated that there were some FeC1 4 − ions as doping agent in the PProDOT matrix, and the content of ZnO had no effect on diffraction pattern of PProDOT. Morphological studies revealed that the pure PProDOT and composites had similar morphological structure, and all the composites displayed an irregular sponge like morphology. The results of electrochemical tests showed that the PProDOT/5 wt%ZnO had a higher electrochemical activity with a specific capacitance value of 220 F g −1 than others. The results from photocatalytic activities of the composites indicated that the PProDOT/5 wt%ZnO had better photocatalytic activity than other composites.
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WATER RESEARCH
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2023
·
IF 12.8
Qiang Liu,Xiaojun Niu,Dongqing Zhang,Xingyao Ye,Peibing Tan,Ting Shu,Zhang Lin
Phosphite, an essential component in the biogeochemical phosphorus cycle, may make significant contributions to the bioavailable phosphorus pool as well as water eutrophication. However, to date, the potential impacts of coexisting photochemically active substances on the environmental fate and transformation of phosphite in aquatic environments have been sparsely elucidated. In the present study, the effect of zinc oxide nanoparticles (ZnO NPs), a widely distributed photocatalyst in aquatic environments, on phosphite phototransformation under simulated solar irradiation was systematically investigated. The physicochemical characteristics of the pristine and reacted ZnO NPs were thoroughly characterized. The results showed that the presence of ZnO NPs induced the indirect phototransformation of phosphite to phosphate, and the reaction rate increased with increasing ZnO NPs concentration. Through experiments with quenching and trapping free radicals, it was proved that photogenerated reactive oxygen species (ROS), such as hydroxyl radical (•OH), superoxide anion (O 2 •− ), and singlet oxygen ( 1 O 2 ), made substantial contributions to phosphite phototransformation. In addition, the influencing factors such as initial phosphite concentration, pH, water matrixes (Cl − , F − , Br − , SO 4 2− , NO 3 − , NO 2 − , HCO 3 − , humic acid (HA) and citric acid (CA)) were investigated. The component of generated precipitates after the phosphite phototransformation induced by ZnO NPs was still dominated by ZnO NPs, while the presence of amorphous Zn 3 (PO 4 ) 2 was identified. This work explored ZnO NPs-mediated phosphite phototransformation processes, indicating that nanophotocatalysts released into aquatic environments such as ZnO NPs may function as photosensitizers to play a beneficial role in the transformation of phosphite to phosphate, thereby potentially mitigating the toxicity of phosphite to aquatic organisms while exacerbating eutrophication. The findings of this study provide a novel insight into the comprehensive assessment of the environmental fate, potential ecological risk, and biogeochemical behaviors of phosphite in natural aquatic environments under the condition of combined pollution.
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SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Xiangdong Cao,Junsheng Hong,Zhonglei Zhang,Junda Li,Jihua Tang,Jiaqi Wang,Duo Yi,Xuejin Li,Yu Du,Xiaoqing Tian
Flower-like zinc oxide nanoclusters were successfully incorporated by different amount of PTCDA organic dye molecular, forming the hetero-structured PTCDA/ZnO composites. Remarkably, a study performed on their NO 2 sensing properties reveals that the 0.5 wt% PTCDA-loaded ZnO sensor exhibits high response, excellent selectivity, quick response speed and low detection limit of 7.4 ppb towards NO 2 molecules at room temperature (25 °C) under green light illumination, which possesses an apparent advantage over the ZnO sensors loaded with other PTCDA concentration as well as upon other light illumination conditions . This work makes a meaningful contribution to the development of NO 2 sensor based on wide-band gap semiconductors with visible light irradiation .
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Advanced Optical Materials
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2023
·
IF 9
Sisi Liu,Meng Wang,Xiong Yu,Hao Li,Haifei Lu,Xiaoyan Wen,Ming-Yu Li,Jianbing Zhang
Infrared (IR) solar cells are potential optoelectronic devices for boosting the power conversion efficiency (PCE) of conventional photovoltaics (such as pervoskite and silicon solar cells) by broadening the utilization range of the sunlight spectrum to short-wavelength infrared region. PbSe colloidal quantum dots (QDs) are one of the optimal candidates for IR solar cells because of their tunable bandgap in the IR region and flexible solution processibility. At present, the best PbSe QD IR photovoltaics generally adopt ZnO as an electron transport layer (ETL). However, the intrinsic drawbacks and surface defects of ZnO can potentially deteriorate the PCE of devices. Herein, Ti 3 C 2 T x , a representative 2D transition carbide, is combined with sol-gel ZnO to develop a new hybrid ETL for fabricating high-performance IR solar cells. This combination effectively suppresses the defects within ZnO by forming new bondings and simultaneously enhances the crystalline of ZnO film. Meanwhile, the introduction of Ti 3 C 2 T x into ZnO film accelerates the transport and collection of photo-generated carriers by constructing a new electron transport pathway. Consequently, compared to the bare devices, the infrared PCE of PbSe QD solar cells increases by 19.5% to 1.04%. These results demonstrate that this hybrid ETL can offer a bright approach for developing high-performance optoelectronic devices.
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MATERIALS CHEMISTRY AND PHYSICS
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2023
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IF 4.6
Debin Zeng,Longtao Wang,Ruian Du,Zhen Wu,Xiting Wang,Chunguang Kuai,Yuzheng Guo,Changlin Yu
CO 2 photoreduction under mild conditions remains challenging, attributing to sluggish kinetics of complex coupling process of multi-electrons-protons and inefficient electron-hole pairs utilization. Herein, with Zn 3 V 2 O 8 as a phase transformation material, we construct an effective Zn 2 V 2 O 7 /Zn 3 V 2 O 8 /ZnO (OVZn) Z-scheme system by partial decomposition of Zn 3 V 2 O 8 into Zn 2 V 2 O 7 and ZnO. Time-resolved fluorescence decay (TRFD) spectra investigation shows that the photogenerated electrons of Zn 2 V 2 O 7 and ZnO recombine with the holes of Zn 3 V 2 O 8 , retaining more reductive electron of Zn 3 V 2 O 8 for CO 2 reduction. Moreover, in-situ Fourier-transform infrared spectroscopy suggests that the heterostructure can lower the energy barrier of CO desorption by changing bridge-bonded CO to linear-bonded CO and optimizing the energy barrier of CO production. Moreover, Cu, Ag and Au loading on OVZn greatly enhance light harvesting and promote photoelectric conversion, producing much photogenerated electron-hole pairs for CO 2 reduction. OVZn and metal loaded OVZn have better photocatalytic performance, showing application superiority on CO 2 photoreduction.
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PLASMA SCIENCE & TECHNOLOGY
·
2023
·Vol. 25
·期 10
·104004
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IF 1.7
Qijun DUAN,Yanze SONG,Shuai SHAO,Guohua YIN,Haoou RUAN,Qing XIE
The surface flashover of epoxy resin (EP) composites is a pivotal problem in the field of high-voltage insulation. The regulation of the interface between the filler and matrix is an effective means to suppress flashover. In this work, nano ZnO was fluorinated and grafted using low-temperature plasma technology, and the fluorinated filler was doped into EP to study the DC surface flashover performance of the composite. The results show that plasma fluorination can effectively inhibit the agglomeration by grafting –CFx groups onto the surface of nano-ZnO particles. The fluorine-containing groups at the interface provide higher charge binding traps and enhance the insulation strength at the interface. At the same time, the interface bond cooperation caused by plasma treatment also promoted the accelerating effect of nano ZnO on charge dissipation. The two effects synergistically improve the surface flashover performance of epoxy composites. When the concentration of fluorinated ZnO filler is 20%, the flashover voltage has the highest increase, which is 31.52% higher than that of pure EP. In addition, fluorinated ZnO can effectively reduce the dielectric constant and dielectric loss of epoxy composites. The interface interaction mechanism was further analyzed using molecular dynamics simulation and density functional theory simulation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Ying Li,Xiu-Er Luo,Ming-Jun Tan,Fu-Hao Yue,Run-Yu Yao,Xin-An Zeng,Meng-Wai Woo,Qing-Hui Wen,Zhong Han
In this study, a novel carboxymethylcellulose / ZnO / chitosan (CMC / ZnO / Cs) hydrogel microbeads loaded with crosslinked porous starch / curcumin (CPS / Cur) were designed and prepared to improve the encapsulation efficiency of curcumin for drug delivery to specific sites. It was found that the total pore volume of crosslinked porous starch (CPS) was increased by 1150 % when compared to the native starch (NS), and the adsorption ratio of curcumin by CPS was enhanced by 27 % when compared to NS. Secondly, the swelling ratio of composite hydrogel microbeads was within 25 % in an acidic environment at pH 1.2, and the swelling ratio of hydrogel microbeads sharply increased to 320 % ~ 370 % at pH 6.8 and 7.4. In addition, the results of in vitro simulated release experiments showed that the released amount of hydrogel microbeads loaded with NS/Cur and CPS/Cur in SGF were within 7 % in simulated gastric fluid (SGF). The highest released amount of curcumin was 65.26 % for hydrogel beads loaded with CPS/Cur, which was 26 % lower than that of hydrogel microbeads loaded with Cur in simulated intestinal fluid (SIF). In simulated colonic fluid (SCF), the released amount of hydrogel microbeads loaded with CPS/Cur and Cur were 73.96 % and 91.69 %, respectively. In conclusion, pH-sensitive drug delivery system with good drug stability and bioavailability were successfully prepared with carboxymethylcellulose / ZnO / chitosan bead, suitable targeting drug delivery to the small intestine .
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PubMed
高影响因子
Chemosensors
·
2023
·Vol. 11
·期 7
·376
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IF 4.2
Xiangxiang Fan,Susu Yang,Chun Huang,Yujie Lu,Pan Dai
In this work, ZIF-8-derived Co3O4@ZnO microspheres were prepared by a liquid-phase concentration-controlled nucleation strategy. The results of the material characterization showed that Co3O4@ZnO microspheres were obtained, and the surface structure could be controlled with the concentration of the ligand. Compared with pure Co3O4microspheres, the operating temperature of optimized Co3O4@ZnO microspheres increased by 90 °C after the gas-sensing test. The response to 50 ppm acetone of Co3O4@ZnO microspheres was 4.5 times higher than that of pure Co3O4, and the detection limit reached 0.5 ppm. Meanwhile, Co3O4@ZnO microspheres showed a shorter response-recovery time and better selectivity. The enhanced-sensing mechanism of the ZIF-8-derived Co3O4@ZnO microspheres was also analyzed.Keywords:gas sensor;microspheres;MOF;ZIF-8
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Surfaces and Interfaces
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2023
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IF 6.2
Zhi-Xian Yang,Li-Chao Jing,Xianbing Ming,Wen-Hao Geng,Weiwei Cao,Yunhua Tian,Peng-Shuai Bin,Ze-Long Bao,Ru-Yu Chang,Hong-Zhang Geng
The preparation of superhydrophobic layers and their research in various fields has always been a hot topic. In this work, we designed a fluffy micro-nano structure model of Zinc oxide (ZnO) to investigate their superhydrophobic properties furtherly. A simple and easily achievable preparation method of superhydrophobic coatings was proposed: The ZnO/polydimethylsiloxane (PDMS) layer was prepared by strictly controlling the ratio of ZnO to PDMS. Based on this, the staggered-growth ZnO rods were prepared on the substrate surface by hydrothermal method . These ZnO rods are structured with micrometer lengths and nanometer diameters, and they form a fluffy ZnO layer on the original coating surface . After being modified by 1H,1H,2H,2H-perfluorooctyltriethoxysilane, the coating possessed excellent superhydrophobic properties with a contact angle of 161° After growing ZnO rods on the surface, the surface roughness was reduced from 326 nm to 181 nm. The superhydrophobic coating has excellent self-cleaning properties, high resistance to acid and alkali corrosion, and superhydrophobic properties against various common liquids. Even after exposure to air for up to 6 months, the contact angle of the superhydrophobic coating can remain above 153° This study provides an excellent idea for future research on superhydrophobic coatings.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Min Zou,Chao Tan,Yan Zhang,Junjie Hu,Zhou Ma,Zhengqiu Yuan,Lei Zhang,Ming Wu,Hu Zhou
To solve the recovery problem of nanosized powder form of photocatalysts, our work was devoted to develop a macroscale membrane-shaped photocatalyst with outstanding efficiency as well as high stability. Specifically, zinc oxide (ZnO) and cadmium sulfide (CdS) nanoparticles were successfully loaded onto the polyurethane (PU) matrix through blending and in-situ growth way, respectively. The introduction of ZnO can effectively improve the membrane hydrophilicity and endow it with some photo-catalysis capability without disturbing membrane structural integrity. After the construction of CdS/ZnO heterojunction , the photocatalytic activity obtained further enhanced. Compared with ZnO/PU (ZP) and CdS/PU (CP), CdS/ZnO/PU composite membrane (CZP) displayed the highest photocatalytic performance. The efficiency of CZP in the degradation of potassium ethyl xanthate (PEX) reached up to 97.06%, which is 7.21 and 5.42 times higher than the ZP and CP, respectively. Furthermore, CZP also exhibited satisfactory performance for removing multifarious refractory organic pollutants including potassium butyl xanthate, potassium amyl xanthate, Rhodamine B, methylene blue , crystal violet, tetracycline , and levofloxacin. Finally, the possible photocatalytic reaction mechanism of representative PEX contaminant over CZP membrane surface was discussed in detail. Overall, this novel composite porous membrane exhibited outstanding application potential in wastewater remediation.
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International Journal of Electrochemical Science
·
2023
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IF 1.5
Chaogang Zhou,Chaojin Zhou,Jiawei Zhang
The poly(o-phenylenediamine)-ZnO (PoPD-ZnO) composite were synthesized by in-situ polymerization, and the waterborne polyurethane was used as the binder. The corrosion inhibition performance of the PoPD-ZnO composite coating on stainless steel was investigated. The structures of homopolymer PoPD and PoPD-ZnO composite were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Cyclic voltammetry demonstrates the redox properties and stability of the composite. After soaking in 3.5% NaCl for a certain period of time, the corrosion resistance of the polymer coating was studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results show that the homopolymer PoPD coating and the PoPD-ZnO composite coating can protect the stainless steel. The corrosion rate of the PoPD-ZnO composite coating with good corrosion resistance is 1.9% of bare steel. In addition, the addition of nano-ZnO facilitates the formation of a compact and low-defect coating, thereby impeding the erosion of corrosive media and improving the corrosion resistance of PoPD coatings.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Jinyan Tan,Jinsong Wang,Jinlong Yang,Jie Wang,Taijiang Gui,Limin Wu,Shuxue Zhou
The current zwitterionic antifouling (AF) coatings generally have limited broad-spectrum AF ability, poor compatibility with coating matrixes and weak mechanical properties due to high water adsorption. In this work, we tried to incorporate zwitterionic component, namely, ( N -methoxyacylethyl)-3-aminopropyltriethoxysilane (MAPS) and ZnO nanoparticles into a moisture-curable polyacrylate (MCP) to fabricate marine AF coatings. AF behaviors were examined by laboratory and field assays towards different target foulants. Laboratory anti-protein ability towards bovine serum albumin promoted with the increase of MAPS and/or ZnO contents, verifying their synergistic AF effect towards the earliest pollutant in biofouling process. Laboratory AF test towards bacterium Pseudoalteromonas marina and diatom Cylindrotheca closterium also exhibited the synergistic AF effect between zwitterions and ZnO nanoparticles, however, depending on their concentrations. Under the highest contents of MAPS ( i.e., 30 %) and ZnO nanoparticles ( i.e., 50 %), the coatings showed the best laboratory AF properties, with the antibacterial rate, sterilization rate and anti-diatom rate of 86.7 %, 71.8 % and 87.6 %, respectively. As for the marine field AF performance, the ZnO nanoparticles content had a significant effect on improving the field antibacterial ability, while the effect of MAPS was not obvious. But for the field anti-diatom assay, MAPS and ZnO nanoparticles depicted synergistic effect on diatom resistance. After field exposure for 52 d, the coatings with 30 % MAPS and 50 % ZnO nanoparticles revealed the best comprehensive AF performance, i.e., 82.4 %, 95.0 % and 95.5 % reductions towards bacteria, diatoms and mussels, respectively, and moreover, maintained pencil hardness of 2 H after immersed in ASW for 9 months. Besides, the coatings were capable of restoring their original oleophobicity and AF capability after mechanical abrasion.
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