CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Huihui Bao,Wenzheng Nie,Yingchun Liu,Linglan Men,Mingzheng Ren,Changlei Xia,Huan Xie
The electrochemical CO 2 reduction (ECO 2 R) driven by the renewable energy represents an effective approach to mitigate atmospheric CO 2 concentration and to achieve carbon neutrality. Zinc (Zn) and its oxides, being among the most abundant metal materials, are frequently employed in the generation of CO by ECO 2 R. Cooper and its oxides have the moderate *CO affinity which enables the C-C coupling reaction to produce the higher value C2+ products. In this work, we have developed the novel CuO/ZnO p-n heterojunction tandem catalyst using a straightforward solvothermal method. By optimizing the content of CuO/ZnO heterojunction, a maximum Faradaic efficiency of 37% for C 2 H 4 can be achieved in a gas diffusion flow cell, which is one of the highest among the Cu-Zn-based catalysts for ECO 2 R. Mechanism investigations illuminate that CuO/ZnO heterojunction interface enhances the adsorption of *CO 2 – intermediates facilitating the formation of *CO intermediates than pristine CuO, meanwhile weakens the adsorption of *H impeding the competitive hydrogen evolution reaction. Therefore, the spillover of CO from ZnO to CuO sites and the electrons rebalance on CuO/ZnO heterojunction interface promote the C-C coupling reaction rates, thus greatly enhances the selectivity for C 2 H 4 .
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Ren Shike,Wang Yuan,Wang Tengle,He Ge,Yuan Shaojun
The corrosion of magnesium (Mg) alloys is detrimental to marine ships, pipelines, transportation, etc. Although superhydrophobic surfaces can effectively protect against corrosion by maintaining an air gap between the solid structure and corrosive media, their long-term corrosion resistance remains limited due to the intrinsic properties of the base materials. Herein, we developed a novel superhydrophobic composite coating with superior corrosion resistance by spraying a mixture of superhydrophobic particles, hexadecyltrimethoxysilane (HDTMS)-modified ZnO nanosheet-decorated diatomite (ZnO@DME/HDTMS), and epoxy resin (E51) onto the surface of AZ31B Mg alloy. The resulting ZnO@DME/HDTMS composite coating exhibited outstanding stability and retained its superhydrophobicity over a wide temperature range (0–200 °C). Moreover, the coating demonstrated excellent adhesion and mechanical robustness in tape-peeling and friction tests. Compared to coatings without superhydrophobic particles, the ZnO@DME/HDTMS composite coating showed significantly lower corrosion rates and enhanced overall corrosion resistance in a 3.5 wt% NaCl solution, simulating marine environments. This work not only offers a superhydrophobic composite coating for the anticorrosion of Mg alloys in marine environments, but also gives a new strategy for preparing functional coatings via rational design of diatomite with hierarchical structures. Graphical
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Mojtaba Ranjbar,Masumeh Ahmadpour,Mahmoud Kiani,Mostafa Govahi
The increasing prevalence of antibiotic-resistant bacteria and cancer necessitates the development of novel, targeted therapeutic strategies. This study aimed to develop a multifunctional nanoplatform combining antibacterial and anticancer properties through green synthesis and strategic surface functionalization. Zinc oxide nanoparticles (ZnO NPs) were biosynthesized using Trametes versicolor extract as a reducing and capping agent, then surface-functionalized with chitosan (Cs) for enhanced biocompatibility and conjugated with folic acid (FA) for targeted delivery. The NPs were characterized using multiple analytical techniques and evaluated for antibacterial activity against Gram-positive ( Bacillus subtilis , Staphylococcus aureus ) and Gram-negative ( Escherichia coli ) bacteria. Cytotoxicity was assessed in cancer cells (MDA-MB-231) and normal cells (MCF-10 A), followed by gene expression analysis of key oncogenic and apoptotic markers. Characterization confirmed the formation of crystalline, core-shell structures with successful ligand attachment. Cs-ZnO NPs demonstrated significantly enhanced antibacterial activity against all tested bacterial strains compared to bare ZnO NPs. FA-Cs-ZnO NPs exhibited selective cytotoxicity toward cancer cells while maintaining biocompatibility with normal cells. Gene expression analysis revealed down-regulation of cancer stemness genes ( CD44 , SOX2 ) and proliferation markers ( mTOR , β-catenin ), coupled with up-regulation of the apoptotic marker Caspase 3 . This green-synthesized, dual-functional nanoplatform demonstrates promising potential for combined antibacterial and targeted anticancer therapy, warranting further in vivo evaluation for clinical translation.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Shixiong Yuan,Daiming Song,Liang Li
Adsorption and activation of CO 2 are among the most intractable challenges of electrochemical CO 2 reduction reaction (CO 2 RR). Various metal-organic frameworks (MOFs), such as Calgary Framework 20 (CALF-20), have demonstrated superior CO₂ adsorption capabilities. However, given the exceptional stability of CO₂ molecules and the significant challenge in breaking their chemical bonds, there is a pressing need to develop electrocatalysts that can effectively activate CO₂. Herein, we explored a MOF pyrolysis modification strategy that utilizes the electronic properties of different functional ligands to promote CO 2 activation. The derivatives of Zn-based MOFs with three ligands, namely 1,2,4-triazole in CALF20, 2-methylimidazole in zeolitic imidazolate framework-8 (ZIF-8) and 2,5-dihydroxyterephthalic acid in Zn-MOF-74, were studied in an H-type cell. CALF-20-derived ZnO/nGNC was proved to be an efficient electrocatalyst towards CO 2 reduction with high selectivity to CO. After pyrolysis, electrons are transferred from carbon to metal, resulting in electron-rich active center Zn, effectively activating CO 2 and accelerating the reaction kinetics, thus leading to a superior performance. The result show that ZnO/nGNC exhibited a high Faradaic efficiency (FE) in the -0.85 ∼ -1.15 V vs RHE (maximum of 87.3 ± 0.6 %). This study gives a practical idea for the synthesis of electrocatalysts with electron-rich active centers.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Weili Ye,Jin Li
Ammonia (NH 3 ) is a common but potentially hazardous gas that may cause inflammation of the lungs or other respiratory illnesses when exposed to high levels of NH 3 for extended periods. Therefore, preparing a gas sensor for real-time monitoring of NH 3 gas at room temperature is of great practical significance. In this paper, a Zn 2 SnO 4 /ZnO (ZZ) metal-oxide-semiconductor gas sensor with high response to NH 3 gas, low cost, easy fabrication, and high selectivity was successfully prepared by using a one-pot hydrothermal method. It was discovered that the content of the mineralizer NaOH serves to regulate the morphology of the samples. The results indicated that this method facilitated a more favorable formation of the n-n type heterojunction between Zn 2 SnO 4 and ZnO, leading to a substantial improvement in the sensor's sensitivity to NH 3 gas. Upon the addition of 3.75 mol/L NaOH, the Zn 2 SnO 4 and ZnO contents in the Zn 2 SnO 4 /ZnO (ZZ-3) samples were approximately equivalent. As a result, under the n-n heterojunction and synergistic interaction, the sensor demonstrated a significantly higher response (1756.1) to 500 ppm of NH 3 at RT, compared to the response values of the pure Zn 2 SnO 4 sample (24.3) and pure ZnO (23.6). Moreover, compared with the response values to other common harmful gases (500 ppm) in daily life, the response to NH 3 was approximately 10.7–1393.7 times higher. Meanwhile, the ZZ-3 samples also exhibit excellent long-term stability. This work provides an idea of using NaOH to modulate the material morphology for the preparation of gas-sensitive sensors.
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高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Liang Yin,Jinfeng Luan,Li Lv,Bin Liu,Wenbin Ren,Xiangqun Chu,Jia Wang,Zheng Lu,Pinhua Zhang,Lulu Du,Guangliang Cui
The detection of hydrogen sulfide (H2S) in exhaled breath at room temperature is essential for health monitoring and disease diagnosis. This study investigates a ZnO/Ti3C2TX nanocomposite synthesized by combining ZnO nanoparticles, prepared by a hydrothermal method, with Ti3C2TX MXene. Experimental results demonstrate that the ZnO/Ti3C2TX nanocomposite sensors exhibit excellent H2S detection performance at room temperature with high sensitivity, rapid response time, and robust recovery capability. Specifically, the ZnO/Ti3C2TX-1.0 wt % nanocomposite sensor shows a response of 85.116 at 5 ppm of H2S, which is 14-fold and 35-fold greater than that of pure ZnO and Ti3C2TX MXene, respectively. The sensor exhibits a rapid response (50 s) and recovery time (115 s) at 100 ppb of H2S. Additionally, it shows exceptional sensitivity to H2S at low concentrations, with a detection limit as low as 1 ppb. Based on the excellent sensing performance, oral exhaled gas detection demonstrates that the sensor effectively differentiates H2S levels in healthy and patient breath samples. These findings highlight the potential of the ZnO/Ti3C2TX nanocomposite in exhaled H2S detection at room temperature, offering new insights for developing ultrasensitive biogas sensors.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Jiayin Wang,Chongjun Huang,Yilong Tu,Zhanye Chen,Yiqing Zhao,Yu Ke
Carboxymethyl cellulose (CMC) gel is an ideal substrate for supporting sunlight responsive photocatalysts, but the photocatalytic disinfection activity decreased due to the light-shielding effect of the gel. In order to enhance the formation of active oxygen species, polydopamine (PDA) was introduced in CMC gels to function as an intermediate to connect two semiconductors inside the gels via its quinhydrone charge-transfer complexation. CMC/PDA gel with a double-network was formed via chemical crosslinking and reversible hydrogen bonding between prepolymerized PDA and CMC, then Ag/AgCl, ZnO and Ag/AgCl/ZnO photocatalysts were formed in situ in CMC/PDA gel, respectively. Ag/AgCl/ZnO heterojunction loaded composite gel displayed a remarkable photocatalytic degradation activity, with a weight ratio of the degraded methyl orange divided by composite gels up to 0.00090 under sunlight irradiation for 30 min. Ag/AgCl/ZnO loaded gel presented the bactericidal rate of 99.9 % against E. coli and 99.8 % against S. aureus . The inhibition zone of Ag/AgCl/ZnO loaded composite gel with dopamine mass of 100 mg increased under 6 h of sunlight compared with 24 h in dark against both E. coli and S. aureus . The biocompatible Ag/AgCl/ZnO loaded composite gel with pH-responsive swelling property and sunlight-responsive antibacterial activity promised to broaden the application of CMC-based antibacterial gels.
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PubMed
高影响因子
ACS Applied Nano Materials
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2018
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IF 0
Jing Qiao,Dongmei Xu,Longfei Lv,Xue Zhang,Fenglong Wang,Wei Liu,Jiurong Liu
In this work, hollow ZnO/Co hybrid nanotubes are prepared by electrospinning followed by calcination and hydrogen reduction process for electromagnetic wave absorption. The texture and electromagnetic wave absorption performance of ZnO/Co hybrid nanotubes with different Co contents are thoroughly investigated. Among the studied hybrid nanotubes, ZnO/Co hybrid nanotubes with the same molar concentrations exhibit superb electromagnetic wave absorbing property. The maximum reflection loss reaches −68.4 dB at 11.4 GHz with a matching thickness of 3.0 mm and the maximum effective absorption (reflection loss ≤ −10 dB) bandwidth is up to 5.9 GHz (9.5–15.4 GHz) with a matching thickness of 2.6 mm. The superior property could be attributed to the favored impedance matching performance and various loss pathways including natural resonance, interfacial polarizations, dipole polarization, and conductive loss. The unique three-dimensional network structure formed by nanotubes further contributes to the loss performance. The hollow ZnO/Co hybrid nanotubes can be utilized as an ideal candidate for lightweight and high-efficiency electromagnetic wave absorption materials.
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International Journal of Electrochemical Science
·
2023
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IF 1.5
Shouhui Chen,Rihui Zhou,Yaqin Chen,Ping Li,Yonghai Song,Li Wang
Zeolitic imidazolate frameworks are a class of metal organic frameworks which are very attractive for their pore structures. However, their pore size and the BET surface would shrink when they underwent heat treatment at high temperature. On the other hand, liquid metal in MOFs might flow through the pores and prevent the shrinkage when pyrolysis. As is known that metallic Sn is liquid when the temperature is above 232 °C, flowing Sn might support and maintain the porous structure of MOFs during the pyrolysis. In this work, porous Sn/C-ZnO core-shell structures were prepared as anodes for LIBs via a two-step method. Firstly, SnO 2 particles were encapsulated in a ZIF-8 layer with different thickness. Then Sn/C-ZnO was generated in inert atmosphere at 700 °C. A Sn/C-ZnO composite, with 11.2% of Sn and 21.0% of ZnO in content, had a BET surface of 32.9 m 2 g -1 . Another Sn/C-ZnO composite, with 55.1% of Sn and 1.8% of ZnO in content, had a larger BET surface of 297 m 2 g -1 . Then the two composites were tested as anodes for LIBs. Although the BET surface of the former was significantly less than that of the latter before cycling and the content of Sn in the former was also much lower than that of the latter, the discharge capacity of the former after 50 cycles was 515.6 mAh g -1 at 100 mA g -1 in the potential of 0.01~3.00 V, which was slightly higher than that of the latter.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Xuebin Hou,Sarah Louise Stanley,Min Zhao,Jin Zhang,Huimin Zhou,Yibing Cai,Fenglin Huang,Qufu Wei
As the most widely used metal oxide catalysts in photocatalytic degradation, the fast recombination of charge carriers limits the photocatalytic performance of multiform TiO 2 , resulting from its direct-band-gap property. In the present work, we designed C-doped coupled TiO 2 /ZnO nanofibrous membrane based on the derivation of ZnO from the metal organic framework (MOF). The morphology and catalytic properties of the composite membrane could be manipulated by the growth of ZIF-8 crystals. Compared to pristine TiO 2 nanofibers (11.4341 m 2 g −1 ), the composite membrane with an optimized ZnO cubes exhibited larger specific surface area (30.2475 m 2 g −1 ) after introducing ZnO cubes. Furthermore, the crossed-network connection between TiO 2 and ZnO cubes is propitious to increase the synergy of the heterojunction , subsequently effectively inhibiting the recombination of photogenetrated holes and electrons. Benefitting from the trinomial synergistic effect of carbon doping, ZnO and TiO 2 , the as-designed composite membrane exhibited excellent photocatalytic performance to Rhodamine compared to pure TiO 2 nanofibers. This study not only presents the strategy of preparing a C-doped coupled TiO 2 /ZnO composites with crossed network connection for effective photocatalysis , but also exploit the application of MOFs.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
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IF 6.97
Jiacheng Yan,Zeming Tang,Binxin Li,Da Bi,Qingxue Lai,YanYu Liang
With the advantages of low cost, non-pollution, and strong controllability over composition, morphology, nanostructures, as well as surface characters, carbon-based nanomaterials are regarded as ideal substitutes of traditional platinum-based catalysts for oxygen reduction reaction (ORR) electrocatalysis in ORR-involved devices. Herein, an in situ ZnO activation-coupled electrospinning strategy was employed to facilely construct nitrogen-doped porous carbon nanofibers (NPCNF) for flexible Zn–air batteries. In situ formation and thermal removal of ZnO make a critical difference in construction of micro/meso-hierarchically porous structures as well as highly active N-doped sites, therefore generating self-standing carbon nanofibers with high nitrogen doping content as well as specific Brunauer–Emmett–Teller of 501 m2/g and 5.6 at. %. As a result, the prepared NPCNF as a self-standing electrode delivers an excellent performance both in alkaline liquid-state and quasi-solid-state Zn–air batteries, giving the possibility of applications in flexible devices.
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高影响因子
ACS Applied Energy Materials
·
2023
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IF 6.4
Lixin Chen,Xiaorui Yu,Zhe Hua,Qing Liu,Vladimir An,Lizhi Feng,Jiaming Guo,Xinglai Zhang,Jing Li,Baodan Liu
Photoelectrochemical water splitting based on suitable catalysts has attracted wide attention as a promising strategy to utilize solar energy to produce clean and renewable hydrogen fuel. Herein, we reported cobalt phosphate-modified (GaN)1–x(ZnO)x/GaN nanowire arrays on a high-temperature conductive GaN substrate toward enhanced photoelectrochemical water splitting by a facile two-step Au-assisted chemical vapor deposition method. The highly conductive Si-doped GaN substrate is designed to serve as a current collector and epitaxial substrate to grow GaN nanowires at high temperature. Meanwhile, high density of branched (GaN)1–x(ZnO)x nanowires with a tunable band gap, strong visible-light absorption, and high catalytic activity is deposited on the surface of GaN nanowires to act as active components to harvest light toward the oxygen evolution reaction. Such multi-junction heterostructures effectively enhance wide spectral utilization and light absorption and simultaneously accelerate the separation of electrons and holes and the transfer of photogenerated electrons from (GaN)1–x(ZnO)x nanowires to the GaN substrate collector and Pt electrode. The photocurrent density of the (GaN)1–x(ZnO)x/GaN nanowire array photoanode can reach 37.5 μA cm–2 at 1.23 V vs reversible hydrogen electrode and could be further enhanced to 186 μA cm–2 by modifying the cobalt phosphate cocatalyst, showing promising potential in clean hydrogen production.
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高影响因子
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