Journal of Nanomaterials
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2017
·Vol. 2017
·期 1
·9689035
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IF 1.871
Xiaofei Tian,Yaping Li,Sikang Wan,Zhenqiang Wu,Zhiwei Wang
It is of significant interest to create functional flexible surfaces that simultaneously exhibit high water-resistance and antimicrobial performances for medical or packaging applications. This study reported a synthesis of functional surface coating on flexible cellulose materials (filter papers) with ZnO nanoparticles and binds of renewable soybean oil-based polymers. Self-aggregation of ZnO nanoparticles could form ZnO particles with two regular morphological patterns. Rather than a rod-like morphology, a flower-like ZnO benefited a promotion of surface hydrophobicity. Moreover, surface with the flower-like ZnO showed a 51.6% promotion on antimicrobial activities against Gram-negative bacteria (E. coli) than the rod-like ZnO. A low binder/ZnO ratio of 0.2 led to a remarkable improvement on water repelling performances without negative effects on a coating adhesion of ZnO. Under this condition, a hydrophobic surface was achieved with a large static contact angle of 138° when applying ZnO nanoparticles at a dosage of 3 g m −2 .
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CERAMICS INTERNATIONAL
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2019
·Vol. 45
·期 16
·19635-19643
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IF 3.45
Zihao Song,Weigen Chen,He Zhang,Yanqiong Li,Wen Zeng,Sirui Tang,Chengzhi Zhu
Acetylene (C 2 H 2 ) gas concentration is a key parameter in transformer monitoring. In current work, the selective acetylene sensors which based on flower-like ZnO structures with NiO nanoparticles were successfully fabricated. The NiO–ZnO composites were synthesized by two-step hydrothermal method . And various of characterization analyses had been applied to the exploration of crystal structure and the p-n heterojunction . According to the systematic gas sensitivity tests, the response of NiO–ZnO (5%) to 50 ppm C 2 H 2 was 15.23 at 200 °C whereas the response of pure ZnO was 4.1 in the same condition. In addition, the response value of NiO–ZnO (5%) to 50 ppm C 2 H 2 was 3.6 times to 50 ppm H 2 . Such a good gas-sensing property of NiO–ZnO composites is due to p-n heterojunction and high catalytic activity of NiO.
研究领域:
材料科学
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传感器技术
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无机化学
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纳米材料
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电力设备监测
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TALANTA
·
2026
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IF 6.7
Lingchao Wang,Nianci Guan,Yun Guo,Xiaofan Li,Hui Guo,Yinzhong Liu,Xiaotao Zhu,Yiyu Qiao,Xuechun Yang
Achieving gas sensors that exhibit excellent sensitivity, selectivity, and rapid response to volatile organic compounds (VOCs) is critically important for effective environmental monitoring applications. In this research, a novel Eu-doped Tourmaline @MOF-ZnO core-shell nanocomposite was designed and fabricated, integrating a MOF-derived porous ZnO shell, a spontaneously polarized tourmaline core, and rare-earth Eu doping. The gas sensing properties of the sensors were systematically investigated across three different test scenarios: (i) at high temperature in the dark, (ii) at high temperature with UV enhancement, and (iii) at room temperature with UV activation. The optimized 0.08 wt% Eu-5 wt% TML-ZnO sensor achieved an exceptional response of 536 to 100 ppm n-butanol at room temperature under UV activation. The response value exceeds that of the pristine MOF-ZnO sensor by a factor of 14.78. Furthermore, the sensor exhibited rapid response/recovery times (39 s and 23 s, respectively), outstanding selectivity and long-term stability, superior detection capability for ultra-low gas concentrations (LOD = 23.35 ppb). This study pioneers a synergistic UV-activated rare-earth doping strategy for TML@MOF-ZnO core-shell nanostructures, enabling room-temperature ppb-level VOCs sensing.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Lilin Sun,Tiantian Wu,Xiaoyang Fang,Rongrong Li
As a highly valued natural lignocellulosic biopolymer, bamboo plays a critical role in developing sustainable material systems. However, when exposed to rainwater, this biopolymeric substrate is highly susceptible to fungal degradation, making it difficult for traditional fungicides to retain long-term efficacy. Their inevitable leaching weakens antifungal performance and raises environmental concerns, while conventional treatments often compromise the mechanical integrity of the lignocellulosic structure. Therefore, developing green, durable, and substrate-compatible antifungal technologies is essential. Nanoscale zinc oxide (ZnO) is a promising inorganic antimicrobial agent due to its multi-mechanism activity and favorable biosafety, yet issues like agglomeration, poor stability, and rapid ion release limit its long-term performance. To overcome these drawbacks, a stepwise in-situ construction strategy is introduced, where a ZnO layer is first grown as both the core and zinc source to direct ZIF-8 formation, yielding a shell that stabilizes ZnO and ensures sustained Zn 2+ release for long-lasting antifungal efficacy. Comprehensive characterization verifies the successful formation of a compact, crystalline core-shell heterostructure well-integrated with the biopolymer matrix. Mechanical testing confirms that the ZnO@ZIF-8 treatment preserves the intrinsic mechanical properties of the bamboo, maintaining a tensile strength of 96.52 MPa while elevating bending strength by 31.79% to 169.46 MPa. Anti-mold and anti-leaching evaluations further demonstrate excellent durability, maintaining Grade 0 (no mold growth) infection after 14 days of leaching and 28 days of humid-heat incubation. This work presents an efficient, durable, and environmentally friendly antifungal strategy for bamboo, offering valuable insights into the application of metal oxide-MOF composites in bamboo protection.
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Small
·
2023
·Vol. 19
·期 27
·2300257
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IF 13.3
Fangyu Gan,Qingrong Rao,Jianqiu Deng,Lichun Cheng,Yan Zhong,Zhao Lu,Feng Wang,Jiang Wang,Huaiying Zhou,Guanghui Rao
The optimization design of micro-structure and composition is an important strategy to obtain high-performance metal-based electromagnetic (EM) wave absorption materials. In this work, ZnO/FeNi composites derived from ZnFeNi layered double hydroxides are prepared by a one-step hydrothermal method and subsequent pyrolysis process, and can be employed as an effective alternative for high-performance EM wave absorber. A series of ZnO/FeNi composites with different structures are obtained by varying the molar ratios of Zn 2+ /Fe 3+ /Ni 2+ , and the ZnO/FeNi composites with a Zn 2+ /Fe 3+ /Ni 2+ molar ratio of 6:1:3 show a hierarchical flower-like structure. Owing to the strong synergistic loss mechanism of dielectric-magnetic components and favorable structural features, this hierarchical flower-like ZnO/FeNi sample supplies the optimal EM wave absorption performance with the highest reflection loss of −52.08 dB and the widest effective absorption bandwidth of 6.56 GHz. The EM simulation further demonstrates that impedance matching plays a determining role in EM wave absorption performance. This work provides a new way for the fabrication of a high-performance metal-based EM wave absorber.
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ACS Applied Energy Materials
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2023
·
IF 6.4
Mengqi Cui,Yuting Li,Na Li,Xiujuan Hao,YangYang Zhang,Qikun Rong,Guofu Zhou,Li Nian
Low-work-function metal oxides as cathode interlayers are widely used in polymer organic solar cells (PSCs), but the surface defect and intrinsic photocatalysis issues severely affect the high efficiency, thickness insensitivity, and stability of PSCs. In this work, we used organosilica nanodots (OSiNDs) to modify ZnO as cathode interlayers via the self-assembly method. The ZnO/OSiNDs bilayer can acquire a suitable work function and a high conductivity of 5.87 × 10–4 S m–1. Through systematic studies, there is stable surface coordination interaction of Zn–N bonding between ZnO and OSiNDs. In i-PSCs, using D18:Y6 as the active layer, the ZnO/OSiNDs-based device achieves the best PCE of 17.87%. More importantly, due to the high conductivity, the PCE for the device based on a 68 nm thick ZnO/OSiNDs interlayer is still high up to 16.53%, while the PCE for the device based on a 66 nm thick ZnO interlayer is only 13.18%. For photostability, the PCE of the device based on the ZnO/OSiNDs interlayer maintains 95% of its original value after continuous AM 1.5G illumination (contains UV light) at 100 mW/cm2 for 600 min, while that of the ZnO-based device only maintains 72% of the original value. This work suggests that ZnO/OSiNDs can be utilized as a cathode interlayer to fabricate highly efficient and stable PSC over a wide range of thicknesses.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Shengming Xu,Jing Xu,Jiandong Wu,Zhengyang Zhou,Bixian Wang,Tianlan Lan
The development of photocatalysts with efficient hydrogen evolution activity has been the goal for sustainable hydrogen production . In this work, heterojunction composite photocatalyst is formed by hydrothermal coupling of ZnO and Mn 0.2 Cd 0.8 S. Compared with pure ZnO and Mn 0.2 Cd 0.8 S, the composite photocatalyst has the ability to provide more abundant active sites and better photogenerated carriers separation efficiency. The optimized composite photocatalyst shows a 9.36-fold increase in hydrogen evolution activity (4297.99 μmol g −1 h −1 ) compared to Mn 0.2 Cd 0.8 S (459.31 μmol g −1 h −1 ) and exhibits excellent cycling stability. Density functional theory calculations identifies Type-II charge transfer path in the composite photocatalyst, achieving effective separation in space of photogenerated electrons from holes and suppressing recombination within the semiconductor. The results show that the construction of Type-II heterojunction in this work achieves a significant enhancement of the hydrogen evolution activity of the photocatalyst by constructing carrier transport channels at the contact interface of the heterojunction.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Qing Liu,Jiaming Guo,Jing Li,Lizhi Feng,Lixin Chen,Zhe Hua,Liu Yang,Xinglai Zhang,Baodan Liu
Herein, we demonstrated the controllable synthesis of a centimeter-scale two-dimensional (2D) ZnO-doped Ga2O3 nanostructure layer by a liquid Ga–Zn alloy printing strategy at near room temperature. Different from the liquid Ga–In and Ga–In–Sn alloys, the surface oxidation behavior of a liquid Ga–Zn alloy follows an obvious competition and cooxidation characteristics instead of the dominant oxidation characteristic of Ga, which could be effectively used to precisely tailor the Zn content of 2D Ga2O3 films. With an increase of the nominal Zn content in the Ga–Zn alloy from 0 to 8 atom %, the real Zn content of 2D ZnO-doped Ga2O3 films gradually increases and finally reaches a maximum saturated value of 16–18 atom % at the eutectic component of 3.87 atom %. Correspondingly, the transmittance and band gap of 2D ZnO-doped Ga2O3 films could also be tuned by changes of the Zn content and crystallinity. The method proposed in this work provides a general route toward the doping synthesis of a diverse nonlayered 2D structure, which will shed light on the applications of various displays and deep-ultraviolet optoelectronic devices.
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CHEMOSPHERE
·
2022
·
IF 8.943
Jianhua Yang,Lu Fang,Zhengkui Li,Guanhua Meng,Yong Jia,Yongbin Jiang,Jianjun Lian,Xinhong Gan
At present, the researches on photocatalysis were mainly focused on the design, improvement and development of catalysts, and less attention was paid to the existing characteristics of environmentally persistent free radicals (EPFRs) during the process of photocatalytic oxidation. In this study, A flower-like Z-type heterojunction ZnO/ZnIn 2 S 4 (ZnO/ZIS) and typical antibiotic ceftriaxone sodium (CS) were taken as study objects, concentrating on the generation characteristics of EPFRs during the degradation of CS by ZnO/ZIS, and clarifying the degradation mechanism of CS in which EPFRs participated. The results showed that the degradation efficiency of 10 mg/L CS by 0.40 g/L ZnO/ZIS reached 85.3% in 150 min under the irradiation of 500 W xenon lamp . It was clear that ·O 2 − and h + play major roles in CS degradation by ZnO/ZIS under visible light, and ·OH plays an auxiliary role. Furthermore, the formation mechanism of EPFRs during photocatalytic degradation processes of CS by ZnO/ZIS were first investigated thoroughly via experimental analysis and density functional theory (DFT) calculations. The concentration level of EPFRs centered on oxygen atoms is 10 11 spin/mm 3 , which were generated in the process of degradation of CS by ZnO/ZIS under visible light. The production of EPFRs chiefly includes two procedures: chemical adsorption and transfer of electrons. The adsorption energy of precursor P8 on ZnIn 2 S 4 side is −1.91 eV, the electrons transferred from precursor P8 and P11 to ZnO/ZnIn 2 S 4 heterojunction. Surprisingly, EPFRs have little negative effects on the degradation process of CS by ZnO/ZIS. The study was not only a key field in the development of photocatalysis technology , but also a new way to study the removal mechanism of antibiotics.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Rui Zhou,Tong Wang,Fei Wang,Dongnian Zhang,Zhihong Hu,Huaizhu Li,Na Huang,Sa Ban,Chuncai Kong,Zhimao Yang,Xiaojun Jia,Hao Zhu
The citrate sol-gel method was used to synthesize LaNi 0.6 Co 0.4 O 3 anchored at ZnO (LaNi 0.6 Co 0.4 O 3 /ZnO) for activation of peroxymonosulfate to degrade ofloxacin in simulated wastewater. LaNi 0.6 Co 0.4 O 3 nanoparticles were uniformly and firmly dispersed on ZnO support during the synthesis process. LaNi 0.6 Co 0.4 O 3 /ZnO had a rapid catalytic rate with an efficiency of 90% in 10 min, which was higher than that of LaNi 0.6 Co 0.4 O 3 (87.7%). Meanwhile, LaNi 0.6 Co 0.4 O 3 /ZnO significantly inhibited metal ion leaching compared to LaNi 0.6 Co 0.4 O 3 (Ni leaching: 0.128 mg/L to 0.022 mg/L, Co leaching: 0.083 mg/L to 0.012 mg/L). The composite material maintained great cyclic stability with efficiency of 93% after 5 cycles. Based on electron paramagnetic resonance studies and the quenching experiments, SO 4 ·− 、 · OH、 · O 2 − and 1 O 2 were the main reactive oxygen species involved in the reaction. The degradation intermediates of ofloxacin were detected by ICP-MS to propose the possible degradation pathways. This work provides an insight for perovskite catalyst for the activation of PMS to treat pharmaceutical wastewater.
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CHEMOSPHERE
·
2023
·
IF 8.8
Peng Wang,Wanqian Cai,Fangyuan Yu,Ping Zhou,Mei Lin,Cong Lin,Tengfei Lin,Min Gao,Chunlin Zhao,Xiangqi Li,Xiao Wu
The decaying photocatalytic rate caused by carrier recombination is a thorny problem that has not been properly solved. Improvement of photocatalysis can be achieved through structural innovation, diversification of catalytic modes, or a combination of both. Herein, effective separation of photo-generated carriers in Bi 0·5 Na 0·5 TiO 3 /ZnO composites was achieved by heterojunction construction for energy band regulation and synchronously mechanical energy harvesting from piezoelectric effect. The formation of heterojunctions between Bi 0·5 Na 0·5 TiO 3 and ZnO was confirmed by electron microscopy and analysis of X-ray photoelectron spectroscopy spectra. The degradation performance of Rhodamine B, a representative industrial dye contaminant, was optimized through the formation of Bi 0·5 Na 0·5 TiO 3 /ZnO heterojunctions and ultrasonic vibration harvesting. Their band structures were described in detail and electrochemical tests were performed to substantiate a novel Z-scheme heterostructure that can explain the carrier separation and transfer processes in catalysis. The piezoelectric polarization field generated by the piezoelectric effect of both Bi 0·5 Na 0·5 TiO 3 and ZnO coordinates perfectly with the photocatalysis , enabling the piezo-photocatalysis. Our research opens a promising avenue in alleviating charge carrier complexation through heterojunction construction and mechanical strain for future pollutants degradation via catalysis.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Lihui Jiang,Boning Jiang,Juan Xu,Ting Wang
Recently, using oxidized regenerated cellulose (ORC) to build a hydrogel system on promoting healing in wounds has a fast-growing market. However, it remains a challenge to improve the degree of oxidation of regenerated cellulose (RC) and to prepare matrices that are uniquely responsive to the wound environment. Herein, highly oxidized aldehyde-based cellulose from porous RC was prepared by NaBH 4 -HCl swelling and then NaIO 4 oxidation pathway. Chitosan (CS), ethylenediamine-cyclodextrin (EDA-CD) along with ORC have been used to construct hydrogel matrices that are pH-responsive and capable of controlled drug release for use as future wound dressings. And zinc oxide nanoparticles (ZnO NPs) with antimicrobial effect and ibuprofen (IBU) with analgesic effect were piggybacked into the hydrogel system. XRD was used to study the presence of ZnO. SEM was used to observe the surface structure of the prepared hydrogel. TEM was used to observe the particle size of the ZnO NPs. Meanwhile, the oxidation conditions of the ORC were explored. Furthermore, the mechanical, swelling, water retention, cytotoxicity, bacterial inhibition properties and treatment effect, which are closely related to the application of wound dressing, were carefully researched. The unique characteristics of prepared hydrogel, including pH-responsive degradability and sustained release properties of IBU, were also investigated.
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