CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Leyao Bi,Boyan Fu,Jiahui Lin,Junsheng Wen,Jiaxing Fu,Binglin Zou,Ningning Su,Chunjie Wang,Yue Wang
Acetylacetone gas is a flammable, explosive, and toxic volatile compound with a pungent odor that can contaminate the atmospheric environment and pose a risk to human health. Consequently, establishing effective detection methods for acetylacetone is imperative. In this study, Co-doped ZnO (ZOC) were synthesized via a hydrothermal method with varying Co concentrations from 0 to 15 %, and used for the detection of acetylacetone for the first time. The sample with an 8 % Co/Zn mass ratio (8-ZOC) exhibits optimal gas sensing performance for acetylacetone. At a working temperature of 260 °C, the response to 100 ppm acetylacetone reaches up to 557.25, with a rapid response time of 6 s. Compared to pure ZnO, the response of 8-ZOC is increased by 5.9 times, and both the recovery time and the optimum operating temperature are reduced by 154 s and 40 °C, respectively. When exposed to UV light, the response value of 8-ZOC further improves to 682.49. Moreover, the underlying mechanisms of the enhanced gas sensing properties are also explored in detail. This research provides essential insights for the development of acetylacetone gas sensors.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2025
·
IF 3.1
Fang Jia,Xu Xilong,Yang Yi,Han Zhiqiang,Zuo Zinong,Han Weiqiang,Lin Bin
Effective removal of soot deposited in diesel particulate filter by catalysts has attracted great attention in the aftertreatment field to achieve environment protection, but the problem is short by incomplete and poor soot combustion. Herein, an integrated ZnO–SnO 2 semiconductor n–n heterostructure strategy of catalysts and ash is proposed for promoting diesel soot combustion. The integrated effects of different catalysts and ZnO ash on soot oxidation are studied with thermogravimetric analysis and gas emission analysis. The diesel soot is simulated by Printex U (PU) particles, and the catalysts include SnO 2 , ZrO 2 , TiO 2 , CeO 2 and Pt/Al 2 O 3 nanoparticles. Compared with other catalysts, the best catalytic effect on soot oxidation is achieved when SnO 2 catalyst is mixed with PU/ZnO at 1:1:1 mass ratio in tight contact method. The S and R w indexes reach the largest values of 9.33 × 10 –8 % 2 min −2 ℃ −3 and 38.64 × 10 5 , and the CO 2 amount reaches the maximum value at 3462 ppm, which is correspondingly with the XRD and XPS spectrum results of PU/ZnO/SnO 2 with ZnO–SnO 2 heterojunction structure having more adsorbed oxygen. The excessive catalyst is negative to the heat and oxygen transfer among the nanoparticles. When the mass ratio of PU/ZnO/SnO 2 is 1:1:1, the soot combustion presents the comparatively superior state. The results of this study innovate the soot oxidation influenced by catalyst and ash, which benefits the optimization of passive regeneration strategy in DPF application.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Velu Manikandan,Duraisamy Elango,Velu Subash,Palaniyappan Jayanthi,Mysoon M. Al-Ansari,Saurav Dixit,Subhav Singh,Seemaisamy Revathi,Sutikno Sutikno,Kwang Soup Song
The development of effective and cost-efficient photocatalysts is crucial for wastewater treatment. This study aimed to synthesize and evaluate ZnO/Fe 2 O 3 nanocomposites (ZnFe NCs) as novel photocatalysts for the removal of organic contaminates. We synthesized ZnFe NCs using a simple, environmentally friendly microwave-assisted method. Characterization was conducted using HR-TEM, SEM-EDS, XPS, and X-ray diffraction. The photocatalytic performance was evaluated with methylene blue (MB) and orange II (O-II) dyes, showing that ZnFe NCs with H 2 O 2 achieved 98.2 % dye removal under 120 min of sunlight. This performance surpassed that of controls, including ZnO, Fe 2 O 3 , and ZnO/Fe 2 O 3 alone. The study also determined optimal conditions for the photocatalysts, demonstrating enhanced photocatalytic activity. Antibacterial tests showed inhibition zones of 22 mm against Staphylococcus aureus ( S. aureus ) and 20 mm against Escherichia coli ( E. coli ) at 100 mg/mL. ZnFe NCs show dual potential for photocatalytic degradation and antimicrobial activity, ideal for wastewater treatment and microbial control.
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BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
·
2017
·Vol. 65
·期 2
·220-229
·
IF 1.413
Huaiyan Sun,Xinyu Jin,Feng Jiang,Ruifeng Zhang
A zinc oxide (ZnO) nanowires/macroporous silicon dioxide composite was used as support to immobilize horseradish peroxidase (HRP) simply by in situ cross-linking method. As cross-linker was adsorbed on the surface of ZnO nanowires, the cross-linked HRP was quite different from the traditional cross-linking enzyme aggregates on both structure and catalytic performance. Among three epoxy compounds, diethylene glycol diglycidyl ether (DDE) was the best cross-linker, with which the loading amount of HRP with p I of 5.3 reached as high as 118.1 mg/g and specific activity was up to 14.9 U/mg-support. The mass loss of HRP cross-linked with DDE was negligible during 50-H leaching at 4 °C, and the thermal stability of the immobilized HRP was also quite good. The catalytic performance of immobilized HRP to decolorize anthraquinone dye was explored by using Reactive Blue 19 (RB 19) and Acid Violet 109 (AV 109) as model substrates. The results indicated that the immobilized HRP exhibited high decolorization efficiency and good reusability. The decolorization efficiency reached 94.3% and 95.9% for AV 109 and RB 19 within the first 30 Min, respectively. A complete decolorization of these two dyes has been realized within 2–3 H by using this new biocatalysis system.
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RSC Advances
·
2024
·Vol. 14
·期 20
·13719-13733
·
IF 3.9
Qilin Han,Zhiyao Wu,Yu Zhou,Yongxin Lei,Bingying Nie,Leilei Yang,Wenbin Zhong,Nannan Wang,Yanqiu Zhu
Developing low-cost and efficient photocatalyst/co-catalyst systems that promote CO2 reduction remains a challenge. In this work, Ag–Ti3C2Tx composites were made using a self-reduction technique, and unique Ag–Ti3C2Tx/ZnO ternary heterojunction structure photocatalysts were created using an electrostatic self-assembly process. The photocatalyst's close-contact heterogeneous interface increases photogenerated carrier migration efficiency. The combination of Ti3C2Tx and Ag improves the adsorption active sites and reaction centers for ZnO, making it a key site for CO2 adsorption and activation. The best photocatalysts had CO and CH4 reduction efficiencies of 11.985 and 0.768 μmol g−1 h−1, respectively. The CO2 conversion was 3.35 times better than that of pure ZnO, which demonstrated remarkable stability even after four cycle trials with no sacrificial agent. Furthermore, in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) and valence band spectroscopy were utilized to propose the photocatalytic reaction mechanism and electron transfer channels of the Ag–Ti3C2Tx/ZnO system, confirming that CHO* and CO* are the important intermediates in the generation of CH4 and CO. This study introduces a novel method for the development of new and efficient photocatalysts and reveals that Ti3C2Tx MXene is a viable co-catalyst for applications.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 12
·1-10
·
IF 2.8
Zheng Haoran,Yu Shihui,Bai Jinke
A scalable strategy is proposed for preparing ultra-flexible transparent heaters (THs) with ZnO-Ag core–shell nanowires (ZnO@Ag NWs) embedded in polyvinylidene fluoride composite films. The obtained THs exhibit a high average transmittance of 85.8% in the visible spectral range and excellent heating performance. The maximum saturation temperature can reach 153 °C within 10 s at an input voltage of 4.0 V. Furthermore, the saturation temperature of THs has not changed significantly after 1000 bending cycles with a curvature radius of 0.5 mm, demonstrating excellent mechanical flexibility. In particular, the THs possess environmental endurance, and no significant deterioration in performance can be found after exposure to high humidity (relative humidity: 85%) and ultraviolet ozone (254 and 185 nm) irradiation for 10 h, which is attributed to the protective role provided by the covering of ZnO shells on the Ag NWs. These outstanding parameters make the fabricated THs to be promising for application in wearable systems, medical thermotherapy pads and industrial defrosters.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Jia Liming,Li Xinmei,Yang Rui,Yan Zhiqi
ZnO/Co 3 O 4 nanocomposite fibers were synthesized via electrospinning followed by controlled calcination , and their structural evolution and gas sensing performance were systematically investigated. Comprehensive characterization (XRD, SEM, FTIR, XPS) revealed that calcination temperature critically governs crystallinity, oxygen vacancy concentration, and morphology. The results showed that the prepared ZnO/Co 3 O 4 nanocomposite fibers at the 500 °C calcination temperature exhibited a complete morphology and a high concentration of oxygen vacancy (49 %), which promoted oxygen vacancy adsorption and redox reactions, enabling room-temperature operation with a response of 17.56 and a rapid response/recovery time (25/34 s) toward 500 ppm ethylene glycol at room temperature. Mechanistic studies demonstrated that the p-n heterojunction between n-ZnO and p-Co 3 O 4 facilitates interfacial charge transfer, generating built-in electric fields that enhance carrier mobility. This work provides a scalable strategy for designing energy-efficient gas sensors through synergistic optimization of heterojunction engineering and defect chemistry.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Bao Guo,Hongjun Kang,Huiyang Zhao,Xinzhi Wang,Yang Li,Songtao Lu,Xiaohong Wu
Transparent superhydrophobic coatings provide passive self-cleaning and dust removal functionality for photovoltaic (PV) modules to sustain the energy conversion efficiency, which is highly dependent on micro/nanostructures of coatings. However, it remains challenge to enhance the micro/nanostructures robustness of such coatings while preserving their optical transparency, self-cleaning and dust removal functionality. Herein, we proposed dense and conformal “nano-armor” by atomic layer deposition (ALD) on transparent superhydrophobic coatings to enhance their resistance to particle impact and structural durability. Experimental results revealed that the ALD-treated coating (SZ90-F) maintained the high optical transparency (89.27 %) and superhydrophobicity with water contact angle of 160.3°, while also exhibiting excellent dust removal efficiency of 99.23 %. Meanwhile, the SZ90-F coating retained the superhydrophobicity and excellent dust removal performance after exposure to 6000 g of sand and 4000 g of water droplets, respectively. Mechanism analysis revealed that the enhanced durability of the transparent superhydrophobic coatings originated from the ZnO layer deposited by ALD, which formed strong chemical bonds on the micro/nanostructures surface, resulting in a continuous “nano-armor” structure, thereby providing effective protection against dust impact and preventing damage to the micro/nanostructures. This study provides a novel strategy for designing durable, transparent superhydrophobic coatings with enhanced mechanical robustness.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Feng Li,Ying Huang,Tong-Wei Zhang,Wei Lu,Chuan-Ze Zhong,Lian-Sheng Cui,Peng-Fei Yao
A Zn-based metal-organic framework (Zn-MOF) with a two-dimensional structure was successfully constructed via a solvothermal method. X-ray single-crystal diffraction analysis shows that Zn-MOF crystallizes in the monoclinic system with the P 2₁/ c space group. The Zn²⁺ ions exhibit a four-coordinated tetrahedral configuration, forming a uninodal 4-connected tetragonal two-dimensional framework with the point symbol {4 ⁴ ·6 ² }. First-principles calculations reveal that Zn-MOF is an indirect band-gap compound with a band gap of 2.64 eV, which is mainly determined by the bpydb²⁻ anionic units. Thermogravimetric (TG) analysis indicates that Zn-MOF undergoes major weight loss in the range of 395–490°C. Therefore, ZnO with different concentrations of oxygen vacancies (OVs-ZnO) was prepared by mixing Zn-MOF with different masses of glucose and calcining the mixture at 500°C. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results confirm that the main component of the calcined samples is ZnO. Electron paramagnetic resonance (EPR) analysis shows the presence of oxygen vacancies (OVs) on the surface of the prepared ZnO samples. Ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) analysis indicates that the band gap widths (E g ) of Zn-MOF and OVs-ZnO are 2.68 eV, 2.55 eV, 2.29 eV, 2.07 eV and 1.76 eV, respectively. Electrochemical impedance spectroscopy (EIS) and photocurrent (PCR) measurements demonstrate that OVs-ZnO (after calcination) is more favorable for the separation of photogenerated electron-hole pairs than Zn-MOF. Photocatalytic degradation experiments show that within 60 min, the photocatalytic degradation rate of TC by OVs-ZnO is significantly higher than that by Zn-MOF; in particular, the degradation rate of TC by OVs-ZnO-4 can reach over 90%. Radical trapping experiments reveal that h⁺, ·OH and ·O₂⁻ are all involved in the photocatalytic degradation process of TC, with ·OH being the key reactive species.
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Gels
·
2025
·Vol. 11
·期 12
·977
·
IF 5.3
Ting Yu,Yang Xu,Xinyue Zhang,Chenkai Zhu,Jianfeng Zhao,Yang Yang,Min Jiang
Collagen types I and III are primary structural proteins that maintain human skin integrity, and their ratio is disrupted during aging. In this study, we developed a biomimetic 3D skin model with vascularization potential to evaluate the effects of nano-zinc oxide (nano-ZnO) in a physiologically relevant context. The model used methacrylated recombinant human collagen (RHC-MA) bioinks with tunable collagen I/III ratios that mimic the skin of children and adults. The bioinks exhibited excellent printability and mechanical properties that enabled the 3D bioprinting of full-thickness skin products, including dermal layers with human skin fibroblasts (HSFs) and human umbilical vein endothelial cells (HUVECs), as well as epidermal layers with keratinocytes (KCs). The model recapitulated native skin architecture, and key markers such as keratin 10 (K10), keratin 14 (K14), and cluster of differentiation 31 (CD31) were determined. Quantitative real-time polymerase chain reaction (qRT-PCR) analysis showed that nano-ZnO significantly modulated genes associated with apoptosis, inflammation, and oxidative stress in skin cells.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Wei Chen,Sheng-Zhe Zhao,Guo-Tao Xiang,Ran Lu,Jia-Lei Xu,Raul D. Rodriguez,Evgeniya Sheremet,Yong-Da Hu,Jin-Ju Chen
Developing high-power output, flexible, and wearable electronics is a significant challenge to materials science. We address this issue by creating a hybrid piezo-triboelectric nanogenerator (PTNG) based on a unique combination of porous ZnO, silver nanowires (AgNWs), and polydimethylsiloxane (PDMS). Our PTNG utilizes porous ZnO, which exhibits a significantly higher piezoelectric coefficient than its non-porous counterpart due to its increased surface area and enhanced atomic polarization. This unique combination of porous ZnO, AgNWs, and PDMS creates a synergistic effect, enhancing both piezoelectric and triboelectric outputs beyond what each material could achieve alone. For instance, our device generates an open-circuit voltage of 146 V and a short-circuit current of 1.1 µA under a pressure of 12.5 kPa and can track human motion while generating 60 V during regular walking. Deformation tests show excellent performance with prolonged use for up to two months. This robust, flexible, and highly sensitive PTNG opens opportunities for next-generation self-powered wearable sensors and energy harvesting applications in healthcare, fitness, and other emerging technologies, particularly those already using PDMS as a base material.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xinyu Wang,Tianren Li,Chunrui Zhao,Zian Fang,Mingyu Li
The selective conversion of peroxymonosulfate (PMS) to singlet oxygen ( 1 O 2 ) critically depends on precise electronic structure engineering of the catalysts. The PMS electron-donating pathway enables 1 O 2 generation, but the high energy barriers associated with the initial intermediate *SO 5 •− formation result in an unsatisfactory 1 O 2 yield. Herein, Co-doped ZnO was designed by calcination of zeolitic imidazolate framework. Co doping significantly improved the visible-light response, enhanced the photogenerated carrier separation and migration of ZnO, and increased the ZnO valence band potential. These effects promoted the electron-donating reaction of PMS to produce 1 O 2 . The optimized Co-ZnO-3/vis/PMS system exhibited a 27.2-fold higher methylene blue degradation rate constant (k = 0.9871 min⁻¹) with 43.7 % total organic carbon removal within 5 min. In addition, the developed 1 O 2 -dominated oxidation system removed 83.1 % of chromaticity, 59.9 % of total phenol, and 24.8 % of chemical oxidation demand from the coking wastewater tailwater. This work provides a pathway for tailoring 1 O 2 -dominated reactive species for contaminant removal, providing a theoretical guideline for the deep treatment of coking wastewater tailwater.
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