ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2021
·
IF 6.291
Qingguo Chen,Yan Hao,Zhao Song,Mei Liu,Dongzhi Chen,Baikang Zhu,Jianmeng Chen,Zhi Chen
Degradation of norfloxacin (NFX) by zinc oxide (ZnO)/g-C 3 N 4 , a magnetic sheet ZnO with g-C 3 N 4 on its surface was studied. Through a new preparation system method, hydrothermal reaction provides a solid-layered magnetic ZnO material basis, and the simple thermal condensation method was used to transform the urea into g-C 3 N 4 on the magnetic sheet ZnO in a uniform and orderly manner to increase the stability and photocatalytic performance of the material. Compared with previous studies, the pore volume and photocatalytic performance of the material are improved, and became more stable. By studying the degradation effect of basic and photocatalytic materials prepared in different proportions, the kinetic constant of ZGF is 0.01446 (min −1 ). The response surface methodology (RSM) was used to study the optimization and effect of solution pH (4−12), photocatalyst concentration (0.2–1.8 g/L), and NFX concentration (3–15 mg/L) on the degradation rate of NFX during photocatalytic degradation. The R 2 value of the RSM model was 0.9656. The NFX removal rate is higher than 90% when the amount of catalyst is 1.43 g/L, the solution pH is 7.12, and the NFX concentration is less than 8.61 mg/L. After 5 cycles, the degradation rate of magnetic materials decreased to 92.8% of the first time. The capture experiment showed that the photocatalytic machine Toxicities was mainly hole action. The TOC removal rate within 2 h was 30%, a special intermediate toxicity analysis method was adopted according to the characteristics of NFX's inhibitory effect on Escherichia coli community. The toxicity of degraded NFX solution disappeared, and the possibility of non-toxic harm of by-products was verified. LC-Q-TOF method was used to detect and analyze various intermediate products converted from NFX after photocatalytic degradation, and the photocatalytic degradation pathway of NFX was proposed.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Muzammal Hussain,Zaheer Ahmad,Onome Ejeromedoghene,Yuting Tian,Khurram Shehzad,Abbas Faheem,Guodong Fu
Phosphotungstic acid-based photochromic composites with rapid ultraviolet responsiveness represent a significant advancement in the development of smart functional materials. In this work, transparent hybrid films were engineered using ethyl cellulose, polyvinylpyrrolidone, and zinc oxide nanoparticles 45 nm, incorporated with phosphotungstic acid 180 nm, through a controlled solvent-evaporation method. The microstructural features and photochromic behavior of the resulting EC-PVP/ZnO/PWA films were systematically examined using transmission electron microscopy, atomic force microscopy, UV–Vis spectroscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy. Contact angle measurements revealed a reduced hydrophobicity, with a water contact angle of 60.1°, attributed to the presence of hydrophilic PEG segments. Under UV irradiation, the films exhibited a rapid and reversible color transition within 1–9 min, driven by photogenerated electrons from ZnO that promote PWA photoreduction through favorable energy-band alignment. The films subsequently returned to their original state within approximately 40 min. Reversible photochromism was preserved in oxygen-containing environments, during which the films adopted a light-blue appearance under visible-light exposure. XPS analysis confirmed a proton-coupled electron-transfer mechanism, indicated by an increase in the W 5 + /W ratio from 0.22 to 0.28 following UV irradiation. This study provides the first demonstration of PWA-integrated EC-PVP/ZnO hybrid films, offering promising potential for ink-free recording media, optoelectronic devices, and smart window technologies.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhiliang Chen,Yaoyu Luo,Chuixiu Huang,Xiantao Shen
Designing a novel type of imprinted photocatalysts for selective photoreduction of highly toxic pollutants is extremely needed in semiconductor photocatalysis. In this work, imprinted photocatalysts (named ZnO/GO-MIPs) were synthesized via Pickering emulsion polymerization by in situ assembling ZnO/GO composites on the synthetic molecular receptors (MIPs). The experimental data showed that the ZnO/GO-MIPs owned specific affinity towards the target Cr(VI) in aqueous solution with an imprinting factor ( IF ) of 1.6. Under the illumination of visible light, the ZnO/GO composites could selectively photoreduce the Cr(VI) adsorbed by the MIPs. In comparison with the ZnO/GO catalysts under light illumination, the ZnO/GO-MIPs showed a 15 fold increase in photoreduction of Cr(VI). Mechanism study indicates the photoreduction of Cr(VI) by the ZnO/GO composites was occurred at the interface between the solid MIP core and the aqueous solution. Compared to the ZnO-MIPs and the GO-MIPs, the ZnO/GO-MIPs clearly showed interfacial synergistic catalysis effect. To the best of our knowledge, this is first time that selective photoreduction of highly toxic pollutants at the solid-water interface by the ZnO/GO-MIPs was achieved. We believe the ZnO/GO-MIP catalysts have great potential in interfacial synergistic catalysis in environment and catalysis fields.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Mujeeb Alam,Danping Jiang,Huan Zhang,Lei Zhang,Faiqa Nadeem,Nadeem Tahir,Chaoyang Lu,Quanguo Zhang
Photo-fermentation offers a promising roadmap for hydrogen production through their ability to harness light energy, however, its lower conversion efficiency is the major bottleneck for its realization. This study investigates the catalytic role of wideband gap nano-photocatalysts (SiC, ZnO, and SnO 2 ) in enhancing hydrogen generation from Arundo donax L. Physio-optical characteristics of SiC, ZnO, and SnO 2 nano-photocatalysts were assessed through SEM, XRD, and FT-IR which confirmed that incorporated nano-photocatalysts are spherical with uniform size distribution and there is no secondary phase. Hydrogen production experiments with varying nano-photocatalyst concentrations revealed that the maximum hydrogen yield of 104 and 98.83 mL/g was achieved with SiC and ZnO, respectively, at loading concentration of 200 mg/L, whereas 69.30 mL/g were observed with 100 mg/L of SnO 2 . The incorporation of SIC, ZnO, and SnO 2 nano-photocatalyst permitted to increase the hydrogen content in overall gas production by 41 %, 37.34 %, and 18.26 % as compared to the control group. The increase in hydrogen production is related to the enhanced e-h pair separation lifetime of SiC, confirmed from PL spectroscopy. Addition of SiC caused a longer availability of electrons that helped to increase the metabolic rate by 38 % and 40.29 % in energy conversion efficiency (ECE). ANOVA results revealed significant differences between the control and maximum values of CHP, HC%, byproducts, and ECE. Tukey pairwise comparisons showed that SiC and ZnO had non-significant differences at 200 mg/L but both significantly outperformed SnO 2 at 100 mg/L. Thus, the selection of suitable catalysts photocatalysts with enhanced e-h pair separation lifetime may offer promising prospects for sustainable energy technologies by enhancing biohydrogen production.
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Desalination and Water Treatment
·
2026
·
IF 3.4
Wei Liu,Jin Wang,Yan Hao,Qinghong Zhang,Kecun Ma,Mei Liu,Zhi Chen,Qingguo Chen
Norfloxacin (NFX) is a widely used antibiotic that poses a persistent threat to aquatic ecosystems. The combination of photocatalysis and microalgae has emerged as a promising strategy for antibiotic removal. However, current research predominantly focuses on optimizing photocatalytic conditions and overall system efficiency, often neglecting the dynamic physiological state of microalgae when exposed to the photocatalytic degradation products of NFX (PDPN), which is the mixture of intermediates after 2 h ZGF photocatalysis of 8 mg/L NFX. This study constructed a synergistic degradation system employing a ZnO/g-C 3 N 4 /Fe 3 O 4 (ZGF) composite photocatalyst and Chlorella vulgaris for PDPN removal. Within this synergistic system, our primary focus was on the microalgal activity when cultured in a medium prepared from the PDPN. The results indicated the degradation rate of PDPN reached 82.1% in the synergistic degradation system. Transcriptomic analysis revealed that microalgae exhibited enhanced adaptability to these products, which were generated from ZGF photocatalytic pre-treatment of NFX. Key functional categories, including catalytic activity, oxidoreductase activity, and cytochrome P450 drug metabolism were significantly upregulated. This study indicates that the ZGF/microalgae system simultaneously achieves efficient pollutant degradation and maintains high metabolic potential as revealed by transcriptomic profiling, providing crucial insights for developing stable and sustainable bioremediation technologies.
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FOOD RESEARCH INTERNATIONAL
·
2026
·
IF 8.8
Yunge Zhang,Mi Li,Yuanchang Cao,Jian Ju,Qingmin Chen,Yanli Ma,Cuicui Li
Novel biodegradable bilayer film with unidirectional release. • PLA/ZnO/MgO outer layer improves barrier and UV-blocking. • Inner gelatin/EUG-THY layer ensures long-term antimicrobial activity. Fresh cucumbers are highly perishable due to moisture loss, microbial infection, and oxidative deterioration. In this study, a biodegradable bilayer active packaging film with unidirectional release was developed for cucumber preservation. The outer PLA layer was reinforced with 2 wt% of a 1:1 ZnO/MgO nanoparticle mixture, exhibiting enhanced hydrophobicity, mechanical strength (tensile strength 62.75 MPa), reduced water vapor permeability (88.7 g/m 2 ·24 h), and excellent UV-blocking. The inner layer was prepared by electrospinning gelatin loaded with 0.2–0.4 wt% eugenol (EUG) and thymol (THY). Unidirectional release evaluation showed that >92% of EUG and THY were released toward the food simulant via a non-Fickian diffusion mechanism ( n = 0.54–0.57). The films exhibited concentration-dependent antimicrobial and antioxidant activities. During 21 days of storage at 4 °C, cucumbers packaged with the EUG/THY-loaded bilayer films showed significantly lower weight loss, reduced color deterioration, and enhanced antioxidant enzyme activities. The 0.4% EUG/THY formulation extended cucumber shelf life to 18–20 days. This bilayer design offers a promising strategy for eco-friendly active packaging with unidirectional release for fresh produce preservation. Download: Download high-res image (174KB) Download: Download full-size image
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Frontiers in Bioengineering and Biotechnology
·
2026
·
IF 5.8
Yuan Fan,Haiyan Yao,Junchao Wei,Yipeng Hu
Titanium (Ti) implants are widely used in bone defect repair, however, postoperative infections and insufficient osseointegration would lead to implant failure. Therefore, it is much critical and necessary to construct antibacterial and osteogenic coatings on the surface of Ti implants to improve the successful rate of operation. Herein, D-penicillamine stabilized chiral ZnO nanoparticles (D-ZnO NPs) were prepared, which were loaded on the surface of Ti implants together with BMP-2 to construct a dual functional coating with antibacterial and osteogenic properties. The in vitro results demonstrated that the coating showed excellent antibacterial ability, and the antibacterial rates against S. mutans , E. coli and S. aureus were 86%, 98%, and 76%, respectively. Additionally, the coating could effectively induce macrophage polarization towards M2 phenotype, which modulated the local immune microenvironment. Furthermore, the introduction of bone morphogenetic protein-2 (BMP-2) promoted osteogenesis, which may enhance the osseointegration of Ti implants. This study provides a novel strategy to address the challenges of Ti implants, and offer the solid theoretical foundation for expanding the clinical applications of multifunctional Ti implants materials.
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2026
·Vol. 26
·期 15
·5988-6000
·
IF 3.6
Zhang Ge,Deng Lihan,Li Jin
Formaldehyde, a common indoor air pollutant, poses a
serious threat
to human health. Therefore, there is an urgent need to develop highly
selective and sensitive formaldehyde gas sensors that operate at room
temperature. Doping with rare-earth elements is an effectively proven
strategy for optimizing the gas-sensing performance at room temperature.
This study developed a method to modify ZnO derived from ZIF-8 by
doping it with the rare-earth element cerium (Ce). The Ce-doped ZnO
(ZCO) series of sensors inherit the shell-and-core architecture derived
from the ZIF-8 precursor, featuring a high specific surface area that
provides support for gas-sensing reactions. Additionally, Ce doping
induces the formation of more oxygen vacancies, thereby enhancing
the formaldehyde adsorption. Among these, the ZCO-2 gas sensor exhibits
the best formaldehyde sensing properties at room temperature, with
a responsiveness of 1006 for 500 ppm formaldehyde (77.4 times that
of a pure ZnO gas sensor) and a response/recovery time of 9/3 s. Because
of the high response value, fast response/recovery time, excellent
selectivity, repeatability, and stability of this gas sensor, it has
a very promising prospect in practical applications.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Bowen Li,Liyang Qin,Weihua Ma,Binbin Yao,Jiahao Wang,Ye Song,Qianqiao Chen,Chengyuan Li,Xufei Zhu
The recombination of photogenerated carriers limits the photoelectrochemical (PEC) efficiency of titanium dioxide (TiO 2 ) nanotubes. To address this, we constructed a type Ⅱ ZnO/TiO 2 heterostructure via in situ hydrothermal loading of ZnO nanoparticles onto highly ordered anodic TiO 2 nanotube arrays. A critical interplay between precursor soaking duration (1 day vs. 5 days) and hydrothermal temperature (120 °C vs. 150 °C) was uncovered, that is, prolonged soaking and lower hydrothermal temperatures were beneficial for enhancing photocurrent. A two-step annealing process utilized in this work can enhance precursor infiltration into the nanotube channels, promoting uniform ZnO nucleation and robust interfacial adhesion. The optimized heterostructure electrode achieved a nearly twofold increase in carrier concentration (from 5.56 × 10 18 to 1.14 × 10 19 cm -3 ) along with reduced charge-transfer resistance and enhanced charge separation efficiency compared to unmodified TiO 2 . Electrochemical impedance spectroscopy study revealed that the modified heterostructure electrode exhibits lower surface charge-transfer resistance and higher bottom barrier-layer resistance than the unmodified electrode, thereby facilitating efficient interfacial charge transfer and suppressing dark current. Using glucose as a probe, the modified electrode delivered a higher photocurrent density and a faster response than the unmodified one. This work provides an alternative approach to optimizing semiconductor heterojunctions, and the improved process demonstrates promising potential for glucose sensing applications.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Jing-Wen Liu,Yan Li,Gang-Long Song,Xiao-Xue Lian
Listeria monocytogenes is a life-threatening foodborne pathogen, and indirect detection via its specific metabolite 3-hydroxy-2-butanone has emerged as a validated strategy. However, reliable early monitoring of LM requires rapid response kinetics for real-time analysis and high selectivity against food-derived volatile organics, and achieving both simultaneously at the ppb level remains a significant challenge. Herein, we have synthesized Fe-doped ZnO nanofibers and the introduction of Fe induces the formation of a mixed Fe 2 + /Fe 3+ valence that facilitates dynamic redox cycling, thereby enhancing charge transfer efficiency and creating additional active sites to improve gas-sensing performance. Systematic gas-sensing evaluations showed that the 0.5% Fe-doped ZnO sensor exhibits an optimal response of 168.9–100 ppm 3H-2B at 170 °C, with a rapid response time of 2 s and a low detection of 110 ppb, significantly outperforming the undoped ZnO and higher Fe-doped counterparts. X-ray photoelectron spectroscopy confirmed the coexistence of Fe 2+ /Fe 3+ , whose dynamic redox cycles enhanced electron exchange between the nanofibers and 3H-2B, thereby boosting sensing performance. This study offers an economical method for 3H-2B detection and demonstrates variable-valence Fe is a potential dopant to tailor ZnO-based gas sensors toward food safety and environmental applications.
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PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Bao Guo,Hongjun Kang,Huiyang Zhao,Xinzhi Wang,Yang Li,Songtao Lu
Low-adhesion superhydrophobic coatings have been considered an effective strategy for mitigating dust accumulation on photovoltaic surfaces, while their long-term outdoor stability under ultraviolet irradiation remains a major challenge. In this work, a dense fluorocarbon layer was deposited onto a SiO 2 –ZnO composite coating by magnetron sputtering to construct a transparent and UV-resistant superhydrophobic dust removal surface. The as-prepared SZ/CF coating exhibits a high water contact angle of 162.8°, a dust removal efficiency of 99.14%, and an average transmittance of 89.67%. After 300 h of UV-B accelerated aging, the coating still maintains superhydrophobicity (150.8°) and high dust removal efficiency (97.01%), demonstrating excellent ultraviolet durability. Mechanistic analysis indicates that the formation of a three-dimensional cross-linked fluorocarbon network suppresses photo-oxidation and preserves the integrity of the low-surface-energy interface. This work provides an effective strategy for developing durable transparent superhydrophobic coatings for long-term photovoltaic dust removal applications.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2018
·Vol. 20
·期 27
·18455-18462
·
IF 3.906
Xiangyang Duan,Chao Ma,Wentao Jin,Xiaoman Ma,Lu’an Guo,Su-Huai Wei,Jinying Yu,Yelong Wu
A simple and efficient top-down strategy, the chemical vapor etching method, is reported for synthesizing corrugated ZnO nano/micro rods (NRs). The stabilization mechanism of this unique nanostructure has been determined through a combination of aberration-corrected field emission scanning electron microscopy, high-resolution transmission electron microscopy, and first-principles calculations. The experimental data are in good agreement with the theoretical calculations, and a remarkable nonpolar-to-polar surface faceting transition is demonstrated. The corrugated-shaped structure results from the remarkable stability of the defect-induced reconstructions (O vacancy, Zn–Zn dimer), which makes the high-index polar {301} and {10} planes lower in energy compared to the nonpolar {100} plane. Based on the results of first-principles surface calculations, a general formula is established to provide an accurate description of the unusual size effect of the length of the corrugated unit vs. the NR diameter, and it also offers direct explanations for certain experimental observations. The present study deepens our atomic-level understanding of the detailed structure and stability of polar surface decorated corrugated ZnO NRs, and points to a viable path towards designing polar-stable wurtzite structures.
研究领域:
材料科学
·
纳米科技
·
表面科学
·
凝聚态物理
·
计算材料学
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