JOURNAL OF NANOBIOTECHNOLOGY
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2023
·Vol. 21
·期 1
·1-11
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IF 10.2
Wu Zhihua,Zhao De,Han Xin,Liu Jichang,Sun Ying,Li Yaogang,Duan Yourong
Background Superhydrophobic substrate modifications are an effective way to improve SERS sensitivity by concentrating analyte molecules into a small surface area. However, it is difficult to manipulate low-volume liquid droplets on superhydrophobic substrates. Results To overcome this limitation, we deposited a hydrophilic Ti 3 C 2 T x film on a superhydrophobic ZnO nanorod array to create a SERS substrate with improved analyte affinity. Combined with its interfacial charge transfer properties, this enabled a rhodamine 6G detection limit of 10 −11 M to be achieved. In addition, the new SERS substrate showed potential for detection of biological macromolecules, such as microRNA. Conclusion Combined with its facile preparation, the SERS activity of ZnO/Ti 3 C 2 T x suggests it may provide an ultrasensitive environmental pollutant-monitoring and effective substrate for biological analyte detection. Graphical Abstract
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Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Sisi Xiao,Zhou Shen,Shilin Song,Song Han,Yansheng Du,Huijuan Wang
Catalysis of the ZnO/cellulose acetate (CA) films in a multi-electrode paralleling dielectric barrier discharge (DBD) system for sulfadiazine (SDZ) degradation was investigated in this study. The catalysis was induced by the multiple physical and chemical effects produced during the DBD process. The obtained results on the reactive species formation revealed that the more O 3 , •OH as well as 1 O 2 could be formed by the addition of the ZnO/CA films into the DBD plasma system. The optimal additive conditions of the catalyst were 4 pieces of 3% the ZnO/CA films addition. There was a better catalytic effect of the ZnO/CA films than the equal amount of the nano ZnO powder addition. The ZnO/CA films still took on the catalytic activity after four cycles usage in the DBD plasma system. The possible degradation pathways were also speculated by analyzing the inorganic and organic intermediates formed during the SDZ degradation.
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Arabian Journal of Chemistry
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2022
·
IF 6.212
Linzhan Bai,Xinyan Wang,Xichao Sun,Jiao Li,Lilan Huang,Haibin Sun,Xueli Gao
Development of electrospun nanofiber membranes with the selective wettability characteristics for effectively separating oil–water mixtures is an extremely advisable strategy. In this study, a superhydrophobic electrospinning carbon nanofiber (F/ZnO/CNF) membrane was successfully prepared by electrospinning and in-situ growth of ZnO, and subsequent fluorination reaction with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (POTS). Benefiting from the influence of needle-like nanostructure and low surface energy, the as-prepared F/ZnO/CNF membrane shows excellent superhydrophobicity. When the growth duration of ZnO is 3 h, the obtained F/ZnO/CNF-3 membrane possesses outstanding water contact angle (WCA, 159.7°) and splendid oil–water separation efficiency (>99 %). Meanwhile, due to its the superior environmental stability the obtained F/ZnO/CNF-3 membrane exhibits excellent low and high temperature resistance, and enhanced resistance to various organic solvents in the face of a series of harsh environments.
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CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Jie Liu,Linye Ji,Junyi Yu,Shanjun Ding,Suibin Luo,Baojin Chu,Jianbin Xu,Rong Sun,Shuhui Yu
We demonstrate that introduction of heterostructure nanoparticles into a polymer matrix is an effective strategy to substantially enhance dielectric breakdown strength (E b ) and thus a high electrostatic energy storage density (U e ) can be obtained, which is highly desired in modern electronic and electrical systems for energy storage and conversion. This is realized through the special “electrical rectification” effect of heterostructure nanoparticles on the charge transport, which stems from capturing and confining charge carriers in the nanocomposites by potential well and potential barrier formed at the heterojunction of ZnO-ZnS nanoparticles. The leakage current of the ZnO-ZnS/polyetherimide nanocomposites (ZnO-ZnS/PEI) is suppressed by the introduced heterojunction, which is accompanied with the simultaneous increase of dielectric displacement and charge–discharge efficiency, resulting in significant enhancement of U e . Notably, the 1 wt% ZnO-ZnS/PEI nanocomposite films possess high discharged energy density at room temperature, i.e. 6.9 J cm −3 at 650 MV m −1 , and even at 150 °C, the U e still remains 3.6 J cm −3 at 500 MV m −1 . Outstanding fatigue resistance over 50,000 charge–discharge cycles at 200 MV m −1 and 150 °C demonstrates high temperature cyclic stability of the heterostructure in confining charge carriers. This work provides a novel and scalable strategy to obtain polymer-based dielectrics with superior energy storage performance.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Xianghua Gong,Yang Li,Jinzhu Wu,Hongjun Kang,Xiaohong Wu
Recently, zeolites have been selected as a potential adsorbent for capturing space molecular contaminants owing to their strong adsorption ability and extreme stability in a harsh environment. Considering the adsorption process in a vacuum environment, enhancement of the adsorption performance of the zeolites is required. Unfortunately, up to now, the improved adsorption behavior for the space molecular contaminants of the modified zeolite adsorbent under ultralow pressure has rarely been reported. Herein, a 13X/ZnO adsorbent was prepared by incorporating ZnO nanoislands into the nanoporous zeolite 13X via atomic layer deposition (ALD). It is found that a representative 13X/ZnO-50 exhibits an increased adsorption capacity toward dimethyl phthalate and the outgassing species of J133 adhesive even under the ultralow pressure of 10–5 Pa. This could be attributed to the synergistic effects of physical interactions and chemical adsorption associated with the unique cage structure of the zeolite and the incorporated ALD-grown ZnO nanoislands. This work provides a useful strategy for developing the adsorbents used in space molecular contamination control during space missions.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 7
·3454-3463
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IF 11.9
Lei Ding,Jinyan Zhao,Zhikang Bao,Shijie Zhang,Huaijie Shi,Jia Liu,Guoliang Wang,Xiaoge Peng,Xing Zhong,Jianguo Wang
H2O2 and O3 production through electrochemical synthesis is a promising approach to replace anthraquinone processes and corona discharge. However, the simultaneous generation of H2O2 and O3 and the use of their synergistic oxidation to degrade organic contaminants remains a challenge. Herein, heterojunction bifunctional ZnO/ZnS@C electrocatalysts were prepared by a one-step pyrolysis method. ZnO/ZnS@C-750 can achieve 90% selectivity for H2O2 and 11% Faraday efficiency for gaseous O3. The primary contributor to such a performance was exploited to accelerate the electron transfer on the heterogeneous interface and generate more reaction sites. H2O2 and O3 can also be simultaneously generated in the electrolyzer and the synergistic effect of H2O2 and O3 can be utilized to completely degrade organic pollutants, such as phenol and tetracycline. This work provided new insights into the design of the 2e− ORR (oxygen reduction reaction) and EOP (electrochemical ozone production) bifunctional electrocatalysts for pollutant degradation.
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JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Junjing Li,Xiuwen Cheng,Huixuan Zhang,Jianfeng Gou,Xinyi Zhang,Di Wu,Dionysios D. Dionysiou
In this study, we designed a plain strategy for fabrication of the novel composite ZnO/CuCo 2 O 4 and applied it as catalyst for peroxymonosulfate (PMS) activation to decompose enrofloxacin (ENR) under simulated sunlight. Compared to ZnO and CuCo 2 O 4 alone, the ZnO/CuCo 2 O 4 composite could significantly activate PMS under simulated sunlight, resulting in the generation of more active radicals for ENR degradation. Thus, 89.2 % of ENR could be decomposed over 10 min at natural pH. Furthermore, the influences of the experimental factors, including the catalyst dose, PMS concentration, and initial pH, on ENR degradation were evaluated. Subsequent active radical trapping experiments indicated that sulfate, superoxide, and hydroxyl radicals together with holes (h + ) were involved in the degradation of ENR. Notably, the ZnO/CuCo 2 O 4 composite exhibited good stability. Only 10 % decrease in ENR degradation efficiency was observed after four runs. Finally, several reasonable ENR degradation pathways were proposed, and the mechanism of PMS activation was elucidated. This study provides a novel strategy by integrating state-of-the-art material science and advanced oxidation technology for wastewater treatment and environmental remediation.
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2022
·Vol. 106
·期 1
·158-172
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IF 2.606
Luo Qiuzi,Sun Yihua,Guo Jin,Zhang Jiangyu,Fang Liang
In this study, the effect of Ti doping ratio on Ti/Ga co-doped ZnO (TGZ) nanopowders was investigated. TGZ nanoparticles with different Ti loadings were prepared using the sol-gel method and analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), infrared spectroscopy (FT-IR), ultraviolet-visible spectrophotometer (UV-Vis), X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL). The results show that when the Ti doping content is low (0.25at%–1at%), all TGZ samples are single-phase and have the same wurtzite structure as pure ZnO, and when the Ti doping content is high (1.5at%–6at%), a second phase appears, which is the Zn 2 TiO 4 inverse spinel phase. When the doping is low, Ti and Ga can replace the position of Zn, the particle size of ZnO is reduced, the absorption of visible light is enhanced, and the catalytic degradation ability is improved. When the powder is highly doped, the shape distortion of the powder is obvious, and the crystal changes from single-phase to multi-phase, but the absorption of visible light is enhanced, and the recombination of electron-hole pairs is reduced. Through the MB degradation experiment, it was found that T 1.5 G 1.5 Z had the strongest degradation ability, and the degradation rate reached 96% in 150 min. With the further doping of Ti, the degradation rate remained at a high level.
Graphical abstract
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ACS Omega
·
2023
·
IF 4.1
Jie Dong,Laixi Zhang,Wei Li,Xin Hu,Anyi Chen,Chaorui Li
In this study, a facile and cost-effective hydrothermal synthesis method was used to synthesize zinc oxide nanoflowers modified by reduced graphene oxide, and subsequently, trimetallic AuPtRu nanoparticles(AuPtRuNPs) were supported via the reduction method for high-sensitivity colorimetric detection of H2O2 in weakly acidic solutions. Compared to monometallic and bimetallic nanoparticles, trimetallic nanoparticles exhibit significant synergistic effects and enhanced catalytic activity. After providing a three-dimensional structure with multiple pores by zinc oxide and enhancing electron transfer ability by reduced graphene, the trimetallic nanocomposites (AuPtRu/ZnO-rGO) exhibited excellent peroxidase-mimicking activity, which can effectively catalyze 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a blue oxidation product (oxTMB) in the presence of H2O2. Compared to horseradish peroxidase (HRP), AuPtRu/ZnO-rGO demonstrated significantly enhanced catalytic velocity (Vmax = 6.16 × 10–8 M/s) and affinity (Km = 0.02) for H2O2. The study of the catalytic mechanism showed that trimetallic Au, Pt, and Ru could effectively catalyze H2O2 to produce hydroxyl radicals (•OH) to accelerate the oxidation of TMB and enhance the peroxidase-mimicking activity of the AuPtRu/ZnO-rGO nanocomposites. The results showed that the as-synthesized hydrangea-like AuPtRu/ZnO-rGO nanocomposites showed enhanced peroxidase-mimicking activity. It could be used for the colorimetric detection of H2O2 in the range 5–1000 μM with a LOD of 3.0 μM (S/N = 3), and the recoveries are 93.0–101.7%. In addition, the AuPtRu/ZnO-rGO nanocomposites have good applicability for sensitive colorimetric determination of H2O2 in milk, and it has broad application prospects as a multifunctional sensing platform in the food processing industry.
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ANALYTICAL BIOCHEMISTRY
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2023
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IF 2.9
Zhimin Li,Xiong Lu,Guiqiao Liu,Libin Yang,Faming Gao
Core-shell ZIF-8@ZIF-67 was synthesized by growing a cobalt-based ZIF-67 on a ZIF-8 seed particle. Herein, through selective etching of the ZIF-8@ZIF-67 core and subsequent direct carbonization , core-shell hollow ZnO@CoO nitrogen-doped nanoporous carbon (HZnO@CoO-NPC) nanocomposites were prepared. HZnO@CoO–NPCs possessed a high nitrogen content, large surface area, high degree of graphitization and excellent electrical conductivity , all of which were attributed to successfully integrating the unique advantages of ZIF-8 and ZIF-67. HZnO@CoO–NPCs were used to assemble acetylcholinesterase (AChE) biosensors for organophosphorus pesticides (OPs) detection. The low detection limit of 2.74 × 10 −13 M for chlorpyrifos and 7.6 × 10 −15 M for parathion-methyl demonstrated the superior sensing performance. The results showed that the electrochemical biosensor constructed by HZnO@CoO-NPC provided a sensitive and efficient electrochemical strategy for OPs detection.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jie Cui,Lin Ye,Xiaoxi Chen,Jianing Li,Bian Yang,Man Yang,Qing Yang,Daqin Yun,Shaodong Sun
Exploring novel materials with both high adsorption capacity and photocatalytic properties is urgent in environmental remediation. In this work, a Z-scheme ZnO/Cu 2 O heterostructure with a large surface area of 45.42 m 2 /g was constructed by using the liquid phase reduction method. Compared to pure ZnO and pure Cu 2 O, the as-synthesized ZnO/Cu 2 O nanocomposites exhibited excellent capacity of adsorption and photodegradation for tetracycline (TC), which was degraded 95.3% of TC within 120 min under simultaneous adsorption and photocatalytic processes. Theory and experimental analysis manifested that the excellent adsorption-photocatalytic activity can be attributed to the large BET specific surface area, the efficient charge carrier separation and the high redox capability. The results of this study identified the potential advantages of ZnO/Cu 2 O composites for removing antibiotics to purify water resources and protect the environment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Chao Hou,Md All Amin Newton,Binjie Xin,Tingxiao Li
Wound infection caused by excessive exudate leads to overhydration of wounds and prevents wound healing. Thus, there is a need for a wound dressing to be developed that can unidirectionally export excess biological fluid while inhibiting bacterial infection. Herein, a nanofibrous bilayer membrane with a unidirectional water transport function was fabricated by electrospinning as a novel wound dressing, which can export excess biological fluid efficiently and further inhibit bacterial infection. The inner layer of the bilayer nanofiber membrane is polylactic acid (PLA)-zinc oxide (ZnO) nanofibers, which are hydrophobic and antibacterial. The outer layer is polyacrylonitrile (PAN)-sodium polyacrylate (SPA) nanofibers, which are hydrophilic and liquid-absorbent. The bilayer nanofibrous membrane's morphology, mechanics, thermal stability, wettability , water absorption, gas permeability, and unidirectional water transport ability were characterized and evaluated. The study showed that the nanofibrous bilayer membrane exhibited excellent physicochemical properties and biological performance, and its mechanical properties can reach 4.6 MPa. In addition, when the thickness of the hydrophobic layer is 3 µm and the thickness of the hydrophilic layer is 44 µm, the double-layer fiber membrane can effectively export the excess biological fluid in 5.09 s and prevent the wound from wetting again. The nanofibrous bilayer membrane with excellent water absorption, air permeability , thermal stability, and mechanical strength provides a feasible solution for chronic wound healing.
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