CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Jian Ding,Shuqun Chen,Ning Han,Yi Shi,Peng Hu,Hongyi Li,Jinshu Wang
Gas response control through structural and defect engineering in metal oxides are critical approaches to realize high performance sensors. Herein, we present the fabrication of ZnO thin films containing nanosized structures and high concentration of zinc interstitials for NO 2 and ethanol monitoring. The target materials were fabricated by aerosol assisted chemical vapour deposition (AACVD) method on ceramic and glass substrates, and were characterized by complementary analytical techniques. The obtained ZnO nanoparticulate and nanopyramidal thin films yielded an outstanding response of ~41 to 1 ppm NO 2 and ~236 towards 100 ppm ethanol, respectively. The reasons accounting for such an enhancement were revealed by the surface-depletion model in ZnO and the chemisorption energies of oxygen molecules on Zn i -enriched crystal facets.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
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IF 4.65
Zhen Qin,Hang Sun,Yanan Tang,Zhiyong Chang,Shengyan Yin,Zhenning Liu
Inspired by the characteristics that plant leaves are beneficial for solar light absorption, we have prepared a bio-inspired hierarchical assembly of carbonized spinach leaves@Au/ZnO (CS@Au/ZnO) for solar energy utilization. CS@Au/ZnO shows a low light reflectance of 5% and a high specific surface area of 311.41 m 2 /g. CS@Au/ZnO demonstrates higher photocatalytic degradation efficiency: more than 97% of Rhodamine B (RhB) and 61% of ciprofloxacin (CIP) could be degraded in 180 min under the visible light irradiation. In addition, we also tested the photocatalytic H 2 production performance of CS@Au/ZnO and the H 2 evolution rate is 2.384 mmol g −1 h −1 under simulated solar light. CS@Au/ZnO shows a high cycling stability in recyclable photocatalytic degradation and photocatalytic water splitting. Moreover, CS@Au/ZnO shows a swift and steady photocurrent of about 63.6 μA/cm 2 , illustrating a high sensitivity to solar light. The enhanced photocatalysis performance of CS@Au/ZnO could be ascribed to the naturally optimized macroporous structure of CS with high conductivity, which could enhance the light harvesting and carrier transport, simultaneously. Moreover, modification of AuNPs can broaden the light response range of ZnONRs and reduce the probability of electron-hole recombination. Due to the wide availability of plant leaves, CS@Au/ZnO assembly has broad application prospects in photocatalytic degradation of organic pollutions, photovoltaic devices , and photocatalytic H 2 evolution.
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Surfaces and Interfaces
·
2021
·
IF 4.837
Fan Wu,Chuan Pu,Minxian Zhang,Bin Liu,Jingling Yang
Solar photocatalysis is a clean and sustainable approach for removing atmospheric NO, but suffers from unsatisfactory removal efficiency. Efficient charge separation and surface reaction are critical factors ensuring the efficiency of solar energy conversion by photocatalysts. To achieve efficient charge steering and an enhanced surface reaction, we synthesized a bicomponent photocatalyst consisting of multivalent Ag species embedded in defect-rich twin-brush ZnO (Ag/TB-ZnO) with strong metal-support interaction (SMSI). The optimum Ag/TB-ZnO with silver loading of 2.0 wt.% achieved NO oxidation efficiency of 71.0% under a GHSV of 1,200,000 mL h −1 g −1 , and NO 3 − selectivity of 94.8%. Outstanding stability of up to 4 h was demonstrated. This superior performance was attributed to the enhanced efficacy of charge separation and surface reaction by the SMSI effect, surface plasmon resonance effect of metallic Ag and the efficient activation of oxygen species through vacancy-rich TB-ZnO.
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高影响因子
IONICS
·
2021
·Vol. 27
·期 11
·4849-4857
·
IF 2.817
Hussain Saddam,Li Yangping,Mustehsin Ali,Ali Akbar,Thebo Khalid Hussain,Ali Zeeshan,Hussain Sabir
In this work, we prepare samarium-doped ceria (SDC) nanocomposite electrolytes by the co-precipitation method with different ZnO:SDC weight ratios for solid oxide fuel cell application. The physicochemical characterization of the nanocomposite electrolytes is carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) techniques. Electrochemical impedance spectroscopy is performed to measure the electrical properties of the electrolytes, and the results show that the optimum composition of ZnO ( x = 0.2) nanocomposite demonstrates a better ionic conductivity ~ 0.1–0.7 S/cm at 350–700 °C. The fuel cell performance of the ZnO/SDC nanocomposite electrolytes is measured with hydrogen as the fuel. The as-synthesized nanocomposite material with ZnO ( x = 0.2) also exhibits a power density of 804 mW/cm 2 along with a maximum open-circuit voltage (OCV) of 1.10 V at 700 °C.
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CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Danmin Lin,Mingchao Li,Yifei Gao,Liang Yin,Yanqing Guan
Accumulation of α-synuclein (SNCA) in the midbrain is considered as a major pathological characteristic of Parkinson's disease (PD). Inhibiting SNCA expression is an efficient approach in PD treatment. Here, we developed a novel brain-targeted ZnO quantum dots (QDs) nanoplatform delivering gene for interfering SNCA expression into the brain for PD treatment. The glutathione (GSH)-modified ZnO QDs composites loading gene, and simultaneously grafting nerve growth factor (NGF) were prepared and used to treat PD models. The fluorescent tracking results indicated that ZnO QDs composites could deliver gene into the brain across blood–brain barrier (BBB) and subsequently release gene through lysosomal escape. Furthermore, in vitro and in vivo results demonstrated that these ZnO QDs composites loading interfering gene and NGF could efficiently provide neuroprotection and reverse neurodegenerative process with low toxicity in PD model treatment. Taken together, this multifunctional ZnO QDs nanoplatform provides a potential theranostic strategy for PD treatment.
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Nano Energy
·
2021
·
IF 17.881
Yongteng Qian,Jianmin Yu,Fangfang Zhang,Yingbo Kang,Chenliang Su,Huan Pang
The fabrication of flexible and high-output triboelectric nanogenerators (TENGs) based on low-cost inorganic functional materials has been receiving increasing attention. In this study, sub-10 nm ZnS/ZnO nanoflakes (ZnSO NFs) were successfully synthesized using a facile method and subsequently combined with polydimethylsiloxane (PDMS) as a triboelectric layer material for the flexible TENGs (FTENGs). The prepared PDMS/ZnSO NFs-based FTENGs presented a remarkable output power density (~2.95 mW cm −2 ) and excellent flexibility (the output power density retained ~82% of its initial value after 2000 bending cycles). Moreover, when a 2 × 2 cm 2 PDMS/ZnSO NFs-based FTENG was subjected to a force applied by a human fist, it powered 70 LEDs, which confirms that the ultra-thin ZnSO NFs we developed are promising candidates for high-output FTENGs.
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高影响因子
LANGMUIR
·
2021
·
IF 3.882
Jin Wang,Qiong Du,Jiashuang Luan,Xuanbo Zhu,Jinhui Pang
Membrane separation has been considered to be the most effective decontamination method for oily waste water. The most significant point of membrane separation is the resistance against membrane fouling. Fabricating hierarchical architectures on the membrane surface is an available approach to improving its anti-fouling property. In this study, ZnO nanoneedles were successfully anchored onto surface-sulfonated poly(ether-ether-ketone) (PEEK) felt via UV/ozone cleaning and hydrothermal synthesis. The modified felt (PEEK-f-Z) showed much better anti-fouling properties and far higher rejection height (33 cm) than the unmodified felt (17 cm) with a separation efficiency up to 99.99%. The enhanced separation properties could be attributed to the stronger water locking capability of the hierarchical architectures on the surface. Furthermore, benefiting from the great chemical stability of PEEK substrates and ZnO nanoneedles, the as-prepared membrane exhibited admirable solvent resistance, mechanical strength, and thermal stability. As a result, PEEK-f-Z could even separate immiscible organic liquids with different polarities and collect hot water from the oil/water mixture, promising to be used under severe conditions.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Simiao Sha,Hui Lu,Shaolin Yang,Tong Li,Jiandong Wu,Jinfu Ma,Kang Wang,Chunping Hou,Zhilin Sheng,Yingchun Li
Zinc oxide (ZnO) nanostructures are commonly used as semiconductor films for the photoanodes of dye-sensitized solar cells (DSSCs). However, the photoelectric conversion efficiency (PCE) of DSSCs with ZnO photoanode was compromised by the instability of the physical and chemical properties of ZnO. In this paper, ZnO-reduced graphene oxide (rGO) composite photoanodes were obtained by a one-step electrodeposition method, and the photoelectric performance of the assembled DSSCs were measured. By comparing the PCE and other photoelectric parameters of the DSSCs constructed by the ZnO-rGO photoanodes deposited under different deposition potentials and times, the DSSCs achieved the best performance with the photoelectric conversion efficiency (PCE), open circuit voltage (Voc), short-circuit current density (Jsc), and fill factor (FF) of 1.07%, 386.15 mV, 4.65 mA cm −2 , and 0.59, respectively.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jing Hu,Chenming Yin,Miao Cheng,Tao Wei,Qianqian Liu,Wanfei Li,Yun Ling,Yafei Zhang,Bo Liu
Constructing heterostructure and N-doping are two effective methods to improve gas sensing performance. Herein, a facile novel solution calcination strategy has been proposed to synthesize N-doped carbon sheets-zinc oxide (NC-ZnO) hybrids for low concentration NO 2 detection. The formation of NC is accompanied by generation of ZnO particles on its surface to construct heterostructure. Intriguingly, NO 3 - acts as an expanding agent and N source in the calcination process, wherein the N elements are directly doped into carbon sheets. As expected, the prepared heterostructural NC-ZnO-63 hybrids exhibit 74.9 times enhancement of response as well as high sensitivity (~ 265.8–20 ppm NO 2 ), excellent repeatability and selectivity compared with pure ZnO. Importantly, the measured detection limit of the NC-ZnO-63 sensor to NO 2 is about 100 ppb (~ 0.3) and the calculated detection limit is 2.65 ppb. Furthermore, the influences of humidity on testing NO 2 gas have been researched systematically which would provide guidance for practical use of similar sensors. In this work, ZnO and derived carbon are low-cost, eco-friendly, and the synthesis strategy presented here is simple and repeatable, which provides new idea for mass fabricating other-type metal oxides-NC hybrids for various applications.
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CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Junge Chen,Yang Yu,Aihu Feng,Le Mi,Huixin Xiu,Yun Yu
Thermal control coatings (TCCs) are an essential part of the thermal control systems in the spacecraft. Solar absorptance and emittance are the key performance parameters of TCCs. To develop an ultra-low solar absorption and stable inorganic TCCs for surface radiator, different TCCs were prepared by co-sintering ZnO and SiO 2 nanoparticles to form Zn 2 SiO 4 /SiO 2 pigment in this work, and the optical properties and radiation stability were systematically studied. It is found that the coating based on composite pigment has high reflectivity in the ultraviolet band and excellent optical performance possessing the low solar absorption of 0.06. In addition, the Zn 2 SiO 4 /SiO 2 coating demonstrates the highest proton and electron radiation stability because that SiO 2 between Zn 2 SiO 4 particles acts as the relaxation center of the defects caused by radiation.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Peng Wang,Tao Dong,Changchao Jia,Ping Yang
ZnO flowers with thin sheet and hemisphere shapes were fabricated via thermal decomposition in an organic solvent. Especially, typical hemisphere morphology with exposed (002) crystal face were created for the first time. Because of exposed (002) facet increased, a facet-like heterostructure of ZnO formed to get enhanced sensor performance, especially after loading Au nanoparticles (NPs) using a supersonic chemistry way. Gas sensing tests indicate that the hemisphere Au/ZnO sensor with the best performance and a nice selectivity to acetone. This is ascribed that the unique second-level structure provides more active centers and diffusion channels for acetone molecules. Au NPs increases the thickness of the surface electron depletion layer, which enhanced the sensitivity of the gas sensor.
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Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Xiao Huang,Chun Chen,Xinting Zhu,Xi Zheng,Sanhua Li,Xingquan Gong,Zuli Xiao,Nian Jiang,Cangyan Yu,Caixia Yi
Tyrosinase inhibitors could effectively limit the activity of tyrosinase in melanocytes to reduce the excessive synthesis and deposition of melanin. However, low skin permeability and lacking in targeting greatly restricted their application. Herein, ZnO quantum dots were synthesized by gel-sol method and grafted with BQ-788, which have been employed as transdermal and targeting carrier to delivery ellagic acid to melanocytes. Ellagic acid loaded ZnO quantum dots with the size distribution of around 9 nm could targetedly bind to melanocytes and enter the melanocytes by endocytosis within 1 h. The ellagic acid release behavior was controlled by the decreasing of pH via the rapid dissolution of ZnO. When the concentration of BQ-788/EA@ZnO was 12.5 μg/mL, the inhibition rate on tyrosinase activity and melanin deposition were up to 44.23 ± 4.97% and 37.50 ± 5.23%, respectively. In view of their good biocompatibility, they were of great potential in clinically external application for tyrosinase inhibition.
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高影响因子
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