Engineering
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2022
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IF 12.834
Youwen Shuai,Xue Huang,Benyin Zhang,Lu Xiang,Hao Xu,Qian Ye,Jinfeng Lu,Jing Zhang
The heterogeneous catalytic activation of peroxymonosulfate (PMS) for wastewater treatment is attracting increased research interest. Therefore, it is essential to find a sustainable, economical, and effective activated material for wastewater treatment. In this study, metal–organic framework (MOF)-5 was used as the precursor, and a stable and recyclable material ZnO@Ni 3 ZnC 0.7 that exhibited good adsorption and catalytic properties, was obtained by the addition of nickel and subsequent calcination. To investigate and optimize the practical application conditions, the elimination of rhodamine B (RhB) in water was selected as the model process. This study demonstrated that the degradation of organic matter in the system involved a coupling of the adsorption and degradation processes. Based on this, the mechanism of the entire process was proposed. The results of scanning electron microscopy, infrared spectrum analysis, and theoretical analysis confirmed that the van der Waals forces, electrostatic attraction, and hydrogen bonding influenced the adsorption process. Electron paramagnetic resonance analysis, masking experiments, and electrochemical tests conducted during the oxidative degradation process confirmed that the degradation mechanism of RhB included both radical and non-free radical pathways, and that the surface hydroxyl group was the key active site. The degradation of the adsorbed substrates enabled the regeneration of the active sites. The material regenerated using a simple method exhibited good efficiency for the removal of organic compounds in four-cycle tests. Moreover, this material can effectively remove a variety of organic pollutants, and can be easily recovered owing to its magnetic properties. The results demonstrated that the use of heterogeneous catalytic materials with good adsorption capacity could be an economical and beneficial strategy.
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CHINESE JOURNAL OF CATALYSIS
·
2022
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IF 12.92
Zhaopeng Liu,Youming Ni,Zhongpan Hu,Yi Fu,Xudong Fang,Qike Jiang,Zhiyang Chen,Wenliang Zhu,Zhongmin Liu
The utilization of metal oxide-zeolite catalysts in the syngas-to-olefin reaction is a promising strategy for producing C 2 –C 4 olefins from non-petroleum resources. However, the effect of the crystal phase of metal oxides on the catalytic activity of these oxides is still ambiguous. Herein, typical metal oxides (ZnO/ZrO 2 ) with different crystal phases (monoclinic ( m -ZrO 2 ) and tetragonal ( t -ZrO 2 )) were employed for syngas conversion. The (ZnO/ m -ZrO 2 +SAPO-34) composite catalyst exhibited 80.5% selectivity for C 2 –C 4 olefins at a CO conversion of 27.9%, where the results are superior to those (CO conversion of 16.4% and C 2 –C 4 olefin selectivity of 76.1%) obtained over (ZnO/ t -ZrO 2 +SAPO-34). The distinct differences are ascribed to the larger number of hydroxyl groups, Lewis acid sites, and oxygen defects in ZnO/ m -ZrO 2 compared to ZnO/ t -ZrO 2 . These features result in the formation of more formate and methoxy intermediate species on the ZnO/ m -ZrO 2 oxides during syngas conversion, followed by the formation of more light olefins over SAPO-34. The present findings provide useful information for the design of highly efficient ZrO 2 -based catalysts for syngas conversion.
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ELECTROCHIMICA ACTA
·
2022
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IF 7.336
Muhammad Waqas,Chengzhou Liu,Qiulan Huang,Xiaoxia Zhang,Youjun Fan,Zhe Jiang,Xiaoqu Wang,Wei Chen
Precise control over the structure and morphology of nano/microarchitectures is the topic of immense interest to tune their physical features and chemical aspects for desired applications. In this work, a novel and effective Ni(OH) 2 three-dimensional nanosheet-coated marigold-like ZnO microflower (mg-ZnO@Ni(OH) 2 NSs) hybrid is designed for the nonenzymatic electrochemical determination of glucose. The morphological evolution of mg-ZnO and mg-ZnO@Ni(OH) 2 NSs was achieved by a one-pot solvothermal strategy through control over the reaction conditions without any assistance of an external shape-controlling surfactant. Furthermore, the as-fabricated mg-ZnO and mg-ZnO@Ni(OH) 2 NSs were systematically evaluated by different spectroscopic, microscopic and electrochemical characterization tools. The results indicate that highly exposed homogeneous nanocorners of mg-ZnO and the synergetic effect of Ni(OH) 2 coating, collectively improve the electrocatalytic efficiency of the designed catalyst. The mg-ZnO@Ni(OH) 2 NS-based sensing electrode exhibits excellent amperometric performance for glucose monitoring, comprising satisfactory sensitivity (259.78 and 62.82 μA mM −1 cm −2 ), wide linear range (0.084–0.941 mM and 0.941–6.50 mM), low limit of detection (0.06 µM, S / N = 3), good stability and high detection selectivity. Moreover, the designed sensor is promising for the potential application in the real-time glucose detection of human serum samples.
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Journal of Magnesium and Alloys
·
2023
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IF 17.6
Chao Yang,Jian Huang,Suihan Cui,Ricky Fu,Liyuan Sheng,Daokui Xu,Xiubo Tian,Yufeng Zheng,Paul K. Chu,Zhongzhen Wu
In the present research, the NaF assisted plasma electrolytic oxidation (PEO) is designed to fabricate the high-content ZnO nanoparticles doped coating on AZ31B alloy. The microstructure, phase constituents and corrosion behavior of the PEO coatings are investigated systematically. The results reveal that the introduction of NaF promotes the formation of MgF 2 nanophases in the passivation layer on Mg alloy, decreasing the breakdown voltage and discharge voltage. As a result, the continuous arcing caused by high discharge voltage is alleviated. With the increasing of NaF content, the Zn content in the PEO coating is enhanced and the pore size in the coating is decreased correspondingly. Due to the high-content ZnO doping, the PEO coating protected AZ31B alloy demonstrates the better corrosion resistance. Compared with the bare AZ31B alloy, the high-content ZnO doped PEO coated sample shows an increased corrosion potential from -1.465 V to -1.008 V, a decreased corrosion current density from 3.043×10 -5 A·cm -2 to 3.960×10 -8 A·cm -2 and an increased charge transfer resistance from 1.213×10 2 ohm·cm 2 to 2.598×10 5 ohm·cm 2 . Besides, the high-content ZnO doped PEO coated sample also has the excellent corrosion resistance in salt solution, exhibiting no obvious corrosion after more than 2000 h neutral salt spraying and 28 days’ immersion testing. The improved corrosion resistance can be ascribed to the relative uniform distribution of ZnO in PEO coating which can transform to Zn(OH) 2 and form a continuous protective layer along the corrosion interface.
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COMPOSITES PART B-ENGINEERING
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2021
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IF 9.078
Xiaopeng Han,Ying Huang,Jiaming Wang,Guozheng Zhang,Tiehu Li,Panbo Liu
Flexible microwave absorption (MA) materials with high thermal conductivities and electric-thermal performances have promising applications in the wearable electronics and artificial intelligence fields. Herein, multifunctional and flexible ZnO/carbon cloth (CC@ZnO) films with effective MA performance were prepared using a typical hydrothermal method . The flexible CC@ZnO-3 film displays high reflection loss (R L ) values of - 47.3 dB at 2.5 mm and broadest effective absorption bandwidth (EAB) of 4.0 GHz in the whole X band for the construction of 3D ZnO arrays and 2D CC matrix. Moreover, CC@ZnO-3 film was coated silver nanowires (AgNWs) solution to fabricate CC@ZnO/AgNWs/PVA (CAP) films with a highly conductively network. As a consequence, CC matrix and AgNWs conductive network contribute CAP with low voltages driven Joule heating performance, which ensure the functional integrity under extreme conditions. Therefore, our fabrications have potential applications in the fields of MA and the protection of wearable electronics.
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INFRARED PHYSICS & TECHNOLOGY
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2026
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IF 3.8
Guanghui Jing,Tingting Wu,Jian Wen,Wei Liu,Yulin Wang,Mengying Lu,Hongwei Lei,Su Sheng,Chao Jiang
High-precision detection of ultraviolet and blue light intensity remains a major challenge in monitoring fields such as industrial, medical, and laboratory applications. This paper proposes a strategy to enhance the sensing performance of FPI cavity using a ZnO/PVA composite material. Leveraging the photo-generated carrier effect of ZnO, the refractive index within the cavity is directly modulated, yielding high-sensitivity wavelength modulation for both UV and blue light. Experimental results show that the FPI 1 cavity with ZnO/PVA composite material achieves a UV sensitivity of 0.273 nm/(mW·cm −2 ) and a blue sensitivity of 0.267 nm/(mW·cm −2 ). Furthermore, a dual-cavity structure (S 1 ) based on the Vernier effect, formed by connecting FPI 1 and FPI 2 in parallel, demonstrates significantly enhanced sensitivities of −2.140 nm/(mW·cm −2 ) for UV light and −2.392 nm/(mW·cm −2 ) for blue light. In addition, the proposed sensing element features facile fabrication, excellent stability, and a relatively simple fiber-optic configuration. This work provides a high-performance fiber-optic approach for UV and blue-light intensity detection, with a low-cost and convenient sensing-element fabrication process.
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Microsystems & Nanoengineering
·
2022
·Vol. 8
·期 1
·1-11
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IF 8.006
Guo Yihao,Zhou Jian,Ji Zhangbin,Liu Yanghui,Cao Rongtao,Zhuo Fengling,Tan Kaitao,Duan Huigao,Fu Yongqing
Surface acoustic wave (SAW) technology has been widely developed for ultraviolet (UV) detection due to its advantages of miniaturization, portability, potential to be integrated with microelectronics, and passive/wireless capabilities. To enhance UV sensitivity, nanowires (NWs), such as ZnO, are often applied to enhance SAW-based UV detection due to their highly porous and interconnected 3D network structures and good UV sensitivity. However, ZnO NWs are normally hydrophilic, and thus, changes in environmental parameters such as humidity will significantly influence the detection precision and sensitivity of SAW-based UV sensors. To solve this issue, in this work, we proposed a new strategy using ZnO NWs wrapped with hydrophobic silica nanoparticles as the effective sensing layer. Analysis of the distribution and chemical bonds of these hydrophobic silica nanoparticles showed that numerous C-F bonds (which are hydrophobic) were found on the surface of the sensitive layer, which effectively blocked the adsorption of water molecules onto the ZnO NWs. This new sensing layer design minimizes the influence of humidity on the ZnO NW-based UV sensor within the relative humidity range of 10–70%. The sensor showed a UV sensitivity of 9.53 ppm (mW/cm 2 ) −1 , with high linearity ( R 2 value of 0.99904), small hysteresis (<1.65%) and good repeatability. This work solves the long-term dilemma of ZnO NW-based sensors, which are often sensitive to humidity changes.
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CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Yingqing Zhan,Yiwen Chen,Hongyu Dong,Yinlong Li,Ao Sun,Ximin Chen,Xulin Yang,Fei Zhu,Hongshan Jia
Two-dimensional graphene oxide (GO) has shown the favorable candidate as functional filler for enhancing the anticorrosive performance of epoxy coating, but its poor dispersion and low antimicrobial ability limited the further application in complex corrosive environment. To overcome these obstacles, a two-dimensional GO-based antimicrobial anticorrosion epoxy composite coating was developed via synergy of graphene oxide and zinc oxide. To achieve this goal, the flower-like ZnO with antimicrobial activity was situ grown on the surface of graphene oxide by hydrothermal route, which was further modified via the dopamine triggered chemical cross-linking with polyethyleneimine (GO-ZnO@DP). Thanks to the good dispersion and the excellent physical barrier property of the GO-ZnO@DP functional filler, the epoxy composite coating exhibited superior ability of corrosion resistance. With the addition of 1.0 wt% GO-ZnO@DP functional filler (G2/EP), the low frequency impedance modulus |Z| 0.01Hz reached 1.57 × 10 9 Ω cm 2 after immersion in 3.5 wt% NaCl medium for 30 days. Meanwhile, due to the introduction of flower-like ZnO, the composite coating exhibited the enhanced antibacterial properties toward the inhibitory experiment of E. coli. Besides, the results of salt spray test, EDS analysis, and mechanical properties strongly supported the long-term corrosion resistance of epoxy coating, which shows promising application of metal protection in the complicated corrosive environment.
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OPTICAL MATERIALS
·
2023
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IF 3.9
Xiaoxia Ou,Pu Chen,Ke Zhao,Cunjie Xia
A novel ternary photocatalyst with a Z-scheme heterojunction was successfully synthesized through the deposition of Ag nanoparticles onto the surface of a ZnO/g-C 3 N 4 composite. The prepared photocatalysts were characterized by XRD , FT-IR, XPS , HRSEM, TEM , DRS, PL, EIS, TPC , and M-S. The photocatalytic performance of the as-synthesized photocatalysts was systematically investigated through the photodegradation of norfloxacin (NOR) and rhodamine B (RhB) under visible light irradiation. The photodegradation efficiency of 5% Ag/ZnO/g-C 3 N 4 (5AZCN) composite photocatalyst reached 86.7% (480 min) and 98.0% (60 min) for NOR and RhB, respectively. Moreover, the apparent rate constants of the 5AZCN composite photocatalysts for NOR and RhB were found to be 3.4 and 22.2 times higher than that of the ZCN composite photocatalysts, respectively. The significantly enhanced photocatalytic performance was ascribed to the widened range of visible light response and the efficient separation and migration of carriers facilitated by the introduction of Ag nanoparticles that functioned as electron transfer mediators. Based on the free radicals quenching experiment and electron spin resonance (ESR) spectroscopy characterization, superoxide radicals (·O 2 − ) were the main reactive species in the photodegradation process. Furthermore, the charge transfer process was proved to be a Z-scheme transfer mechanism. This work provides a promising approach to simply constructing novel efficient Z-scheme photocatalysts for the elimination of environmental pollutants.
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ANALYST
·
2023
·Vol. 148
·期 20
·4995-5001
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IF 4.2
Weixin Li,Xinyang Wang,Lifen Chen,Fang Luo,Longhua Guo,Cuiying Lin,Jian Wang,Bin Qiu,Zhenyu Lin
Two-dimensional (2D) layered MoS2 has good dispersion and adsorption properties, but being a narrow bandgap semiconductor limits its application in photoelectric sensing. In this study, a homogeneous photoelectrochemical sensor based on three-dimensional (3D) ZnO/Au/2D MoS2 is proposed for the ultrasensitive detection of tetracycline (TET). MoS2 is uniformly embedded on the 3D ZnO/Au surface by ordered self-assembly. The physical method of π–π interaction of MoS2 replaces the conventional use of chemically modifying aptamers on the electrode material surface. Under optimal conditions, this method has been successfully applied to the detection of TET in milk, honey, pig kidney and pork samples with reliable results. We believe that this study presents a method for the preparation of sensing carriers and target detection with great potential for application.
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PubMed
高影响因子
Nanoscale Research Letters
·
2021
·Vol. 16
·期 1
·1-8
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IF 4.703
Lv Chunzheng,He Lirong,Tang Jiahong,Yang Feng,Zhang Chuhong
As an important photoconductive hybrid material, perylene/ZnO has attracted tremendous attention for photovoltaic-related applications, but generally faces a great challenge to design molecular level dispersed perylenes/ZnO nanohybrids due to easy phase separation between perylenes and ZnO nanocrystals. In this work, we reported an in-situ reaction method to prepare molecular level dispersed H-aggregates of perylene bisimide/ZnO nanorod hybrids. Surface photovoltage and electric field-induced surface photovoltage spectrum show that the photovoltage intensities of nanorod hybrids increased dramatically for 100 times compared with that of pristine perylene bisimide. The enhancement of photovoltage intensities resulting from two aspects: (1) the photo-generated electrons transfer from perylene bisimide to ZnO nanorod due to the electric field formed on the interface of perylene bisimide/ZnO; (2) the H-aggregates of perylene bisimide in ZnO nanorod composites, which is beneficial for photo-generated charge separation and transportation. The introduction of ordered self-assembly thiol-functionalized perylene-3,4,9,10-tetracarboxylic diimide (T-PTCDI)/ ZnO nanorod composites induces a significant improvement in incident photo-to-electron conversion efficiency. This work provides a novel mentality to boost photo-induced charge transfer efficiency, which brings new inspiration for the preparation of the highly efficient solar cell.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuan Shu,Xiaolan Duan,Qiang Niu,Rongyong Xie,Pengfei Zhang,Yunxiang Pan,Zifeng Ma
Zinc oxide is a key material in catalysis. Designing of ZnO crystal aggregates with the surface defect has received significant attention. Herein, we synthesized ZnO aggregates with tiny primary nanoparticles through a mechanochemistry-assisted salt-templating (potassium chloride) method. Interestingly, this KCl-templating strategy could lead to significant increase in specific surface area (SSA) of ZnO (up to 91 m 2 /g), whereas commercial ZnO-COM has a SSA of 5 m 2 /g. Meanwhile, this strategy via ZnCl 2 -KCl solid solution has also created a number of oxygen vacancies into ZnO aggregates. With these attractive features, as-made Pd-ZnO catalyst showed outstanding performance in methanol steam reforming, especially at low temperature (20 % Conversion and 95 % CO 2 Selectivity at 150 °C). Current strategy provides a gateway for the rational design of ZnO-based catalytic materials.
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