NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 17
·7035-7041
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IF 3.288
Mufei Liu,Hao Yang,Zewen Xu,Wenlu Ma,Fang Cui,George Lu,Linxu Xu,Tieyu Cui
Based on green chemistry, 3D hierarchical ZnO microflowers (MFs) constructed from layered 2D nanosheets have been designed as carriers to uniformly load PdO/Pd nanoparticles by the calcination of the precursor (ZnO/Pd(II) microflowers) in air. The ZnO/Pd(II) microflowers are prepared by dipping the 3D ZnO MFs in an ethanolic solution of PdCl2 without involving additional agents. The as-prepared 3D hierarchical ZnO microflowers are a stable support to enhance the dispersibility of PdO/Pd nanoparticles to achieve better catalytic performance for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). In addition, the synergistic effect between the PdO and Pd nanoparticles is another major driver that promotes the catalytic process. Over 98% of 4-NP is reduced within 7 min. Furthermore, structural analysis of the ZnO/PdO/Pd microflowers can provide useful information for understanding structure-performance relationships.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2024
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IF 4.2
Wuzhi Zhu,Jiaming Hu,Xiaohui Tan,Fangfang Wu,Xuyuan Chen,Xiuxun Han
Large open-circuit voltage deficit is still the main factor restricting the performance of kesterite Cu 2 ZnSn(S,Se) 4 thin film solar cells. The high concentration of Cu Zn defects and [2Cu Zn + Sn Zn ] defect clusters are believed to be the significant origins of severe band tailing of the kesterite absorber. A promising way to improve the open-circuit voltage and power conversion efficiency of the device is substituting Ag + with a larger ionic radius for Cu + to suppress the defects and construct a front-graded bandgap. However, the Ag doping in kesterite can significantly lower the melting temperature, which results in difficulties in forming an Ag grading distribution across the absorber due to the strong thermal diffusion . Herein, we innovatively introduce a ZnO insert layer in the precursor film, which is expected to slow down the Ag-Cu interdiffusion during the selenization, thereby forming a desired front-graded bandgap. The Ag grading distribution in absorbers is regulated by the thickness of ZnO insert layer. The effects of ZnO insert layer on the phase compositions, morphologies, optical properties , and photovoltaic performance of Ag-doped kesterite absorbers are investigated.
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Xuechen Zhou,Limo He,Chiyu Wang,Yufan Yang,Yanglin Chen,Song Hu,Sam Fong Yau Li,Yifei Sun,Sheng Su,Yi Wang,Jun Xiang
Methanol, as a H 2 storage carrier, is a good option to tackle with the challenges of H 2 storage and transportation. To improve hydrogen production and reduce energy consumption, a new approach of electrified methanol decomposition (MD) by Joule heating was investigated in this work. The conductive metal skeleton catalysts were prepared using nickel foam (NF) as a catalyst support and employing a hydrothermal-impregnation method to load the Cu/Zn active components. The catalyst heats up rapidly upon energizing, and the heating rates reaches over 10 °C/s. The Joule heating method significantly promotes the methanol conversions of CuO-ZnO/NF, CuO/NF, and ZnO/NF. Methanol conversion over CuO-ZnO/NF at 300 °C under Joule heating is over 80 % higher than that of conventional external heating, while its energy consumption is only 29 % of that under external heating. As a result, methanol conversion per unit power in Joule heating condition increases by 5.6 times compared with that in external heating. The in/ex-situ characterizations reveal that the Joule heating of metal skeleton catalyst promotes the lattice oxygen release of NF skeleton and redox of Cu/Zn species, which generates an extra electrochemical effect on the reaction. This study of Joule heating provides a new strategy of converting methanol to H 2 in a more efficient, energy-saving, and flexible way, and has important application potential in hydrogen energy and chemical energy storage (“Power-to-X”).
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COMPOSITES SCIENCE AND TECHNOLOGY
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2024
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IF 8.3
Hang Jia,Cheng Liu,Yu Zhang,Yue Qiao,Hongjian Gu,Xi Chen,Wenqi Zhao,Xigao Jian
In this work, a biomimetic root-soil-like interfacial phase structure was constructed to improve the weak interfacial bonding of the fibers and resin based on the mechanical interlocking theory. Unidirectional basalt fiber (BF) reinforced high-temperature resistant thermoplastic poly (phthalazinone ether nitrile ketone) (PPENK, T g = 278 °C) composites with multiscale structures were prepared. By utilizing a whiskerization technique, the zinc oxide nanoarrays (ZnO-NAs) with controllable morphologies grown on the BF surface through a pyrolysis-hydrothermal method. The remarkable field emission properties of the ZnO-NAs allow for visually characterizing the interfacial phase structures. The flexural, interlaminar shear, and interfacial shear strengths of BF-ZnO-PEI-2/PPENK composite were increased by 43 %, 65 %, and 177 %, respectively. Further investigations revealed that the flexural strength retention was 61 % at 250 °C, respectively. This study introduces a novel and viable approach to enhance the interfacial properties of BF-reinforced high-performance thermoplastic composites and expands their applications within high-temperature environments.
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Journal of Physical Chemistry C
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2013
·
IF 4.814
Shibu Zhu,Xin Tian,Jingjing Chen,Liming Shan,Xiaoling Xu,Zuowan Zhou
ZnO crystals with different morphologies including microrods, hierarchical microspheres, and hollow microspheres were fabricated via a simple and low-cost trisodium citrate-assisted hydrothermal method. The related morphologies and structures of the as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results showed that trisodium citrate played a crucial role as a capping agent in the formation of ZnO nanostructures, and accordingly, the rational growth mechanism was proposed. The obtained ZnO nanostructures were used as a photoanode in dye-sensitized solar cells (DSSC), and the photovoltaic results demonstrated that the short circuit current density and the overall conversion efficiency of the hierarchical microspheres based DSSC were 6.05 mA cm–2 and 1.42%, respectively, which were largely improved compared with those of the microrods based DSSC (1.92 mA cm–2 and 0.41%) and hollow microspheres based DSSC (3.37 mA cm–2 and 0.79%). The significant improvement for the former was attributed to the sufficient dye loading and efficient light scattering.
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SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Bing Zhang,Hongyun Meng,Xue Wang,Jing Li,Honghong Chang,Wenlong Wei
Herein we designed a novel photoelectrochemical sensing platform based on Fe 3+ doped ZnO-Ag photocatalyst (Fe 3+ /ZnO-Ag) for ultrasensitive Hg 2+ detection by using exonuclease III-assisted target recycling and DNAzyme-catalyzed amplification. Firstly, Fe 3+ /ZnO-Ag was synthesized to provide photocurrent under visible light irradiation. Secondly, target Hg 2+ was determined by hairpin DNA probes on the Fe 3+ /ZnO-Ag modified ITO based on T-Hg 2+ -T, and then Hg 2+ was released by the digestion of exonuclease III to double-stranded DNA. Finally, the photocurrent markedly decreased due to catalysis of hemin/G-quadruplex toward 4-chloro-1-naphthol. Under optimal conditions, the photocurrents were linearly related to Hg 2+ concentrations form 0. 5 nM to 100 nM with a detection limit of 0. 1 nM at the 3 S blank criterion. More importantly, the developed biosensor exhibited good selectivity, repeatability, and stability, meanwhile, this analysis platform held great potential for testing real water samples in future.
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FUEL
·
2025
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IF 7.5
Caiyun Han,Yunfei Gao,Juan Lei,Shuang Wang
The development of efficient monolithic catalysts for CO 2 hydrogenation to methanol holds great significance in addressing the industrial application of Cu-based catalysts. In this study, a series of monolithic catalysts by coupling MOFs-derived oxides with Cu(OH) 2 transition layers loaded on copper foam (CF) are successfully prepared, in which the content of active Cu can be facilely controlled by tuning Cu(OH) 2 load. And various characterization results prove that the metal-oxide interface effect is successfully applied in monolithic catalysts. This strategy offers the unique advantage of constructing the rich metal-oxide interface over monolithic catalysts; thus, significantly enhances the methanol synthesis activity. Furthermore, utilizing this phenomenon, many yZC x CF (x = 1.25, 2.5) catalysts are synthesized by adjusting the amounts of MOFs-derived oxides, revealing an ideal Cu/Zn ratio may optimize the metal-oxide interface (Cu-ZnO interface) on the catalysts. Notably, the 4ZC 2.5 CF catalyst demonstrates the highest methanol space–time yield (STY) of 183 g·kg cat -1 ·h −1 and 150 h of stability. The “Cu(OH) 2 transition layer control interface” strategy proposed in this study provides the feasibility and key parameters in the large-scale preparation of monolithic catalysts.
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Materials Advances
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2025
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IF 4.7
Xinxin Li,Lianjie Du,Zhou Wan,Doudou Xu,Chen Liu
In this study, novel ZnO/BiOI/AgI ternary heterojunction photocatalysts were synthesized via a facile precipitation method to address challenges in organic pollutant degradation and microbial disinfection under visible light irradiation. The composites were systematically characterized (XRD, SEM, TEM, XPS, BET, UV-vis DRS, and PL), showing significantly enhanced visible light absorption, efficient charge carrier separation, and superior photocatalytic performance, compared to binary and single-component counterparts. The optimized ZnO/BiOI/AgI-3030 sample achieved 98.1% degradation of Rhodamine B (RhB) and 59.1% degradation of Norfloxacin (NOR) within 3 hours, attributed to the synergistic effects of the heterojunction structure, which facilitated efficient charge transfer and promoted the generation of reactive oxygen species (ROS). Furthermore, the composite demonstrated remarkable antibacterial activity against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and methicillin-resistant Staphylococcus aureus (MRSA), with bactericidal rates exceeding 99.8%. Cytotoxicity assays revealed 88.79% inhibition of DLD-1 colorectal cancer cells. Mechanistic studies confirmed the formation of a unique n–p–n heterostructure, enabling effective charge carrier separation and strong redox capabilities. Additionally, the photocatalysts exhibited excellent stability and reusability over four consecutive degradation cycles, maintaining high catalytic efficiency. These findings underscore the potential of ZnO/BiOI/AgI ternary composites as efficient and sustainable photocatalysts for environmental remediation and antimicrobial applications.
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FUEL
·
2024
·
IF 6.7
Tao Jiang,Jinsen Fu,Yujie Liang,Junli Fu,Lijuan Wang,Qing Zhou,Wenzhong Wang
In this study, a novel ternary ZnO-based nanorod arrays (NRAs) photoanode is designed and constructed for the first time for unassisted solar-light-driven water splitting to generate H 2 using photoelectrochemical (PEC) cell. The ternary heterojunction photoanode is constructed by modifying ZnO NRAs with ZnFe 2 O 4 nanosheets (NSs) and CdS nanoparticles (NPs), successively. The band alignment study demonstrates that ZnFe 2 O 4 NSs as an interfacial modification layer not only enlarge the contact area with ZnO and CdS respectively to build a stair-step band alignment of conduction band levels for the efficient transport of electrons but also make the valence band of ZnFe 2 O 4 to be as the hole accumulation site in the ternary heterojunction. The electrochemical and photoluminescence measurements demonstrate the efficient separation of the carriers. Consequently, the ternary ZnO-based NRAs photoanode achieves a significant H 2 generation rate of 92.9 μmol/h, 6.23 and 2.97 times of ZnO NRAs and ZnO/ZnFe 2 O 4 NRAs/NSs photoanodes, respectively.
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RESEARCH ON CHEMICAL INTERMEDIATES
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2025
·
IF 3.5
Wang Liping,Tao Xin,Li Renxing,Jiang Lirong,Chen Lin,Li Bingqian
Hydrogen is recognized as a clean and efficient energy carrier, and photocatalytic hydrogen generation represents a pivotal technology for sustainable energy development. In this work, a highly active noble metal-free ZnCo 2 O 4 /ZnO/C composite has been successfully synthesized via in situ carbonization of a ZnCo-based Prussian blue analogue (PBA), exhibiting remarkable photocatalytic hydrogen generation activity. Under simulated solar irradiation, the optimized composite achieves a high hydrogen generation rate of 2039.3 μmol/(g·h), along with excellent stability. The significantly enhanced photocatalytic activity originates from a unique S-scheme heterojunction charge transfer mechanism and multi-component synergistic effects. Specifically, the intimate interfacial contact among graphitic carbon, ZnCo 2 O 4 , and ZnO facilitates efficient separation and migration of photogenerated electron–hole pairs. The S-scheme mechanism not only preserves photogenerated electrons with strong reduction capability but also enhances charge carrier utilization. Furthermore, the graphitic carbon improves the electrical conductivity and light-harvesting capability. These factors are responsible for the remarkable photocatalytic performance and good stability. This work provides a compelling demonstration of utilizing PBA-derived carbonization as a versatile platform for fabricating efficient, stable, and scalable photocatalysts for practical hydrogen production.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Qiu-Yu Peng,Meng Wang,Song Chen,Long-Hua Zou,Yun-Cheng Li,Fan-Bing Meng
PAC@PHZ-II exhibits a distinct color change for different pH values and ammonia. • Bilayer film's low water vapor transmission rate aids food preservation. • PAC@PHZ-II strongly inhibited S. aureus , E. coli , and L. monocytogenes . • PAC@PHZ-II effectively indicate fresh pork and spoiled pork. A PAC@PHZ-II bilayer film composed of polyvinyl alcohol/carboxymethyl konjac glucomannan/alizarin as the sensor layer and poly(3-hydroxybutyrate- co -3-hydroxyvaleric acid)/nano-ZnO as the antibacterial layer was developed using electrospinning technology for meat preservation and freshness perception. Structure analyses revealed that there are interactions between the sensor layer and antibacterial layer. The bilayer film has a lowest water vapor transmission rate of 26.03 ± 0.21 g·m −2 ·h −1 , and the tensile strength and elongation at break are approximately 150% and 290% higher than those of single-layer films, respectively. The bilayer film is sensitive to pH and ammonia, exhibiting visible color changes from yellow to purple. Antibacterial test indicated the dual functional film had strong antibacterial activity against Staphylococcus aureus , Escherichia coli and Listeria monocytogenes . Pork packaged with the film exhibits a 3 days shelf-life extension, and the color changed when meat freshness decreases, suggesting a potential use in preserving and monitoring pork freshness. Download: Download high-res image (236KB) Download: Download full-size image
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PubMed
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Materials Today Communications
·
2026
·
IF 4.9
Wei Zhang,Rui Tong,Xiangmin Zhao,Wei Gao,Xue Wang,Xinhui Yang
Ga and F co-doped ZnO (GFZO) thin films were prepared on quartz substrates via the sol-gel spin-coating method, followed by annealing in O 2 , Ar, N 2 , and H 2 atmosphere. The effects of annealing atmosphere on the structure, optical transmission, electrical properties, and thermal stability of GFZO films were systematically investigated. All GFZO films exhibited a typical wurtzite structure with a c-axis preferential orientation. The average optical transmittance of GFZO films annealed in Ar, N 2 , and O 2 atmospheres exceeded 90% in the visible region, while that of the H 2 -annealed sample was about 60%. The resistivity values of GFZO films annealed in Ar, N 2 , and H 2 atmospheres ranged from 1×10 -3 to 3×10 -3 Ω·cm at room temperature, whereas the film annealed in O 2 showed a much higher resistivity of 7.887×10 5 Ω·cm. Notably, the GFZO thin films annealed in Ar or N 2 atmosphere can maintain a low resistivity of 8×10 -3 Ω·cm even at 500 °C while retaining excellent thermal stability. With high optical transmittance, low electrical resistivity, and outstanding thermal stability, the Ar and N 2 annealed GFZO thin films are highly suitable for transparent conductive thin film applications.
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