COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Shuqi Guo,Xueze Zhang,Shangxuan Li,Huifang Wang,Xianghua Gao,Baolong Niu,Wenfeng Li
Quercetin (Que) is a naturally occurring bioactive compound with various potential health benefits, but its low stability and low bioaccessibility limit its application in functional foods. Therefore, there is an urgent need to prepare a novel composite hydrogel bead with efficient and controlled release. Specifically, porous starch (PS) was first prepared by enzymatic hydrolysis to increase the specific surface area and thus enhance the adsorption rate of Que. Scanning electron microscopy confirmed the formation of the PS and the adsorption of Que. The maximum swelling properties of carboxymethylcellulose-porous starch composite hydrogel beads (CQPZ) were reduced by adding different amounts of zinc oxide to achieve slow release. The results showed that the higher the amount of zinc oxide, the stronger the slow-release performance, while the lower the drug loading capacity. To obtain composite hydrogel beads with both low swelling and high drug-carrying properties, bilayer gel beads (CQPZ/CS) were prepared by electrostatic self-assembly of carboxymethyl cellulose and chitosan. The experimental results showed that the drug loading was significantly increased by nearly 2-fold while enhancing the slow-release performance. In addition, the CQPZ/CS composite hydrogel beads enhanced the stability of Que under light and heat conditions, and the DPPH radical scavenging rate after UV irradiation was still greater than 75%, which was much higher than that of free quercetin (31.08%). In conclusion, the prepared hydrogel beads are a promising delivery system for bioactive compounds.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Dingzhou Xiang,Shiqi Zhang,Guanghui Cheng,Lu Li,Xing Wang,Chenghuan Zhong,Shan Gao
Direct photocatalytic methane conversion into high-value liquid oxygenates has garnered significant research interest under mild conditions, yet a critical challenge is to obtain an excellent formaldehyde yield rate and selectivity only using H 2 O as the oxidant. Herein, a 2D g-C 3 N 4 nanosheet/ 0D ZnO quantum dots (ZCN) Z -scheme heterojunction was established by the self-assembly strategy to acquire an outstanding C1 liquid oxygenates (methanol and formaldehyde) with productivity of 908.13 μmol g cat −1 h −1 under ambient temperature and pressure without extra oxidant. Notably, the HCHO yield rate could be reached to 706.32 μmol g cat −1 h −1 with a selectivity of 69 %. The confinement effect of ZnO quantum dots (ZnO QDs) broadens the bandgap to some extent, making the catalyst possess a strong oxidation potential that could oxidize H 2 O to generate enough hydroxyl radical ( · OH) for activating CH 4 . Meanwhile, the ZCN Z -scheme heterostructure improves the migration and transport efficiency of photoexcitons but also enhances the activation and adsorption of CH 4. In situ experiments verify that the ZCN heterostructure accelerates the generation of methyl radical ( · CH 3 ) and · OH. This work paves a new way toward rationally constructing photocatalysts for CH 4 conversion into desirable chemical products under ambient conditions.
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MATERIALS & DESIGN
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2025
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IF 7.9
Ran Huang,Lisheng Tang,Lianjiang Tan
This study explores the green and low-cost synthesis of iron-doped zinc oxide nanoparticles (Fe-doped ZnO NPs) using a simple, scalable sol–gel method under mild conditions. The novelty of this work lies in the combination of industrial scalability, eco-friendly processing, and cost-effectiveness, which together enable sustainable production of high-performance nanomaterials. Fe doping was employed to enhance the photocatalytic and antibacterial properties of ZnO by promoting reactive oxygen species (ROS) generation and bandgap narrowing, thereby improving light absorption and antimicrobial efficiency. The synthesis utilized water and ethanol as solvents, ensuring an environmentally benign process that avoids hazardous reagents. The Fe-doped ZnO NPs were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), confirming the successful incorporation of Fe into the ZnO lattice with well-defined crystalline structures. The nanoparticles exhibited strong antibacterial activity against both Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli, with enhanced inhibition observed at higher Fe concentrations. Furthermore, a preliminary cost analysis demonstrated the economic viability of the sol–gel route for large-scale industrial production. The study highlights the potential of Fe-doped ZnO NPs synthesized via a green, scalable, and cost-effective approach for applications in coatings, food packaging, and biomedical fields.
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高影响因子
Nanoscale
·
2018
·Vol. 10
·期 15
·7218-7227
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IF 7.233
Xuemei Dong,Dong Chen,Junshuai Zhou,Yan-Zhen Zheng,Xia Tao
ZnO as a promising electron transport layer (ETL) to TiO2 for perovskite solar cells (PSCs) has achieved a power conversion efficiency (PCE) of 18.9%; however, this is still lower than that obtained for TiO2-based PSCs (higher than 20%). Herein, we report the fabrication of high-efficiency methylammonium (MA) and Cs co-alloyed formamidinium (FA) triple cation perovskite based ZnO PSCs via delicate control of the cation compositions and annealing temperatures. By virtue of structural, morphological, spectral and electrochemical characterizations and analysis, we found that the incorporation of MA and Cs into FA perovskite enables the formation of a highly crystalline black phase perovskite with reduced surface roughness, which inhibits charge recombination and promotes electron transfer at the ZnO/perovskite/spiro-OMeTAD interfaces and hence improves Jsc and FF values of the cell. As a result, the ZnO PSC based on MA0.1FA0.75Cs0.15PbI3 annealed at 110 °C achieved a PCE as high as 20.09%, exceeding the previous highest efficiency recorded for ZnO ETL based PSCs. The optimized MA0.1FA0.75Cs0.15PbI3 material demonstrated excellent reproducibility and long-term cell durability under ambient conditions within 1000 h. Particularly, the incorporation of a small amount of Br into the triple cation perovskite, i.e., MA0.1FA0.75Cs0.15PbI2.9Br0.1 led to a further enhancement in PCE of up to 20.44%, which is comparable with the best-performing MA and Cs-containing FA-based lead halide TiO2 PSCs.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Yan Li,Jing-Wen Liu,Xiao-Xue Lian,Shu-Mei Yang
Triethylamine is an organic amine compound with strong irritancy and toxicity that threatens ecological balance and human health, making accurate detection crucial. However, achieving high sensitivity and selective detection of TEA in ppb level is challenging. Herein, we have successfully prepared an Au-ZnO/ZIF-8 via an interface oxidation strategy followed by Au nanoparticles loading. The synthesis process involves three key steps: firstly, ZnO nanofibers are prepared by electrospinning, followed by in-situ coordination growth to form a ZIF-8 layer on the ZnO surface; subsequently, Au nanoparticles are decorated onto the ZnO/ZIF-8 surface through an impregnation-reduction method; finally, the composites are calcined in a tube furnace to generate oxidation layers while retaining the intrinsic properties of ZIF-8. Sensing tests toward 100 ppm TEA reveal that the Au-ZnO/ZIF-8 sensor exhibits a response of 1012.5 with a low detection limit of 2.78 ppb at 235 °C. This performance is 13.9-fold higher than that of ZnO/ZIF-8 (72.9 at 303 °C) and 30.5-fold higher than that of pristine ZnO (33.1 at 328 °C). Furthermore, the sensor demonstrates high selectivity for TEA, short response times (7 s), as well as excellent repeatability and stability. It indicates that the Au-ZnO/ZIF-8 sensor holds great potential for practical TEA detection, thereby providing a feasible strategy to improve the gas detection capabilities of MOF-based sensors.
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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
Liu Hongxu,Xie Junhao,Sun Shulin
In recent years, piezoelectric–photocatalytic materials have attracted significant attention due to their potential to address environmental pollution issues in a straightforward, effective and sustainable manner. In this paper, Ag nanoparticles are successfully immobilized on the surface of ZnO, and a multifunctional PVDF-based water treatment membrane with piezoelectric–photocatalytic performance is constructed for the first time by combining the prepared ZnO@PDA-Ag composite nano-photocatalysts with the PVDF-g-IL piezoelectric matrix. The distinctive structure of ZnO@PDA-Ag enhances charge separation in the photocatalytic process, effectively promoting the photocatalytic activity of ZnO. The grafting IL onto PVDF chain segments induces a transformation of the polar crystalline phases within the PVDF. The synergistic effect of both results in significant improvements to the membrane’s porosity, increasing the permeate flux. The PVDF-g-IL/ZnO@PDA-Ag membrane demonstrates a high degree of efficiency in the removal of various dyes with an approximate removal efficiency of 100%. Furthermore, the PVDF-g-IL/ZnO@PDA-Ag membrane displays piezoelectric polarization, resulting in the formation of a built-in electric field when exposed to ultrasound, which enhances electron–hole separation and transfer efficiency. The membrane is capable of degrading approximately 98% of the dye within a 90-min degradation experiment. Finally, the PVDF-g-IL/ZnO@PDA-Ag membrane exhibits excellent mechanical stability even after multiple self-cleaning and recycling cycles.
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高影响因子
Journal of Materials Chemistry B
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2015
·Vol. 3
·期 13
·2651-2659
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IF 4.726
Chi Yang,Ling-wei Hu,Hong-Yan Zhu,Yong Ling,Jin-Hua Tao,Chun-Xiang Xu
Throughout the years, reported intracellular H2O2 sensors just focused on unrelated measurements of intracellular H2O2 generated from the stimulus of Cd2+, ascorbic acid (AA) etc., leading to difficulty in data interpretation. Here, a novel reduced graphene oxide quantum dots (rGO QDs)/ZnO hybrid nanofibers-based electrochemical biosensor for the detection of intracellular H2O2 released from cancer and normal cells under the stimuli of the corresponding anticancer drugs permits a quantitative study of the interaction between the target drug compound and the cancer cell, which is suitable for candidate drug screening. Nylon 6/6 nanofibers are used as robust templates for the facile fabrication of novel rGO QDs/ZnO hybrid nanofibers via electrospinning followed by a step hydrothermal growth method. The as-made sensor was applied to determine H2O2 released from a prostate cancer cell (PC-3) versus a noncancerous cell (BPH-1) under the stimuli of the corresponding anticancer drugs (apigenin, antisense CK2α etc.). The amount of H2O2 released from the PC-3 cancer cell is about (320 ± 12) amol per cell and about (210 ± 6) amol per cell for the BPH-1 noncancerous cell under the stimuli of specific therapy drug antisense CK2α. These results demonstrate that the rGO QDs/ZnO hybrid nanofibers-based electrochemical biosensor can efficiently detect the distinct amounts of H2O2 released from cancer and noncancer cells.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Quan Chen,Lunan Wu,Xiaoli Zhao,Xiu-Jie Yang
Zn-Ti layered double oxide (LDO) nanosheets were synthesized by a simple co-precipitation-calcination process for the enhanced photocatalytic degradation of methyl orange (MO), rhodamine B (RhB) and methylene blue (MB). ZnTi-LDOs nanosheets present higher photocatalytic efficiency for MO, RhB and MB removal, which is 5.4, 4.4 and 6.7 times of that of Zn-Ti layered double hydroxide (LDH), respectively. The photocatalytic activity of synthesized ZnTi-LDOs is greatly affected by the mole ratio of Zn/Ti, calcination temperature and pH value. It is found that the formation of ZnO/ZnTiO 3 heterojunction in ZnTi-LDOs could effectively accelerate the rapid separation of charge carriers, and thus enhance the photocatalytic activity via enlarging the photoresponse range. The possible charge transfer mechanism for photocatalytic degradation of organic dyes by ZnTi-LDOs was proposed based on the active species test and UV–Vis diffuse reflectance spectra. The results of active species trapping experiments showed that ‧OH, ‧O 2 − , h + , e − all had effect on the degradation of RhB , and ‧OH played a major role. This study provides a new insight for the photocatalytic degradation of organic pollutants from wastewater by ZnTi-LDOs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yanning Qu,Xiaojian Xu,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
ZnO is widely used as a photocatalyst in industry, however, it is still a challenge to degrade refractory antibiotics in water. In this study, a novel surface-functionalized N,S-doped carbon quantum dot (N,S-CQD) was synthesized and embedded into ZnO for the formation of a new ZnO/N,S-CQDs hybrid nanoflower via one-pot hydrothermal process. The as-prepared ZnO/N,S-CQDs showed significantly enhanced photocatalytic activity under visible and near-infrared (NIR) light irradiation, in which 72.8% of MG was decomposed after 180 min under NIR light. In addition, approximately 92.9% and 85.8% of ciprofloxacin (CIP) were degraded by ZnO/N,S-CQDs under simulated sunlight for 20 min and natural sunlight for 50 min, respectively. Furthermore, the mechanism was investigated and the results show that the surface functionalization, electron transfer, up-converted luminescence properties of N,S-CQDs, together with the highly reactive facets of ZnO nanoflowers, made great contributions to the enhanced photocatalytic activity of ZnO/N,S-CQDs. Additionally, the results of active species trapping experiments indicated that the hydroxide free radicals, holes and superoxide radical anions all played certain roles in the photocatalytic reaction. Finally, ZnO/N,S-CQDs was employed for photodegradation of antibiotics in actual water, the degradation efficiency of antibiotics still remained above 60% after 120 min. We believe that the ZnO/N,S-CQDs nanoflower is a promising photocatalyst for the degradation of refractory antibiotics under sunlight irradiation. The relatively low cost and excellent photocatalytic performance of ZnO/N,S-CQDs is beneficial for industrial applications.
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高影响因子
RSC Advances
·
2022
·Vol. 12
·期 9
·5062-5071
·
IF 4.036
Zhenshan Li,Qi Li,Rong Jiang,Yan Qin,Yan Luo,Jinsong Li,Wei Kong,Zhiguo Yang,Chao Huang,Xin Qu,Tao Wang,Lin Cui,Gang Wang,Shengchao Yang,Zhiyong Liu,Xuhong Guo
Cu(II) ions are one of the most common forms of copper present in water and can cause bioaccumulation and toxicity in the human body; therefore, sensitive and selective detection methods are required. Herein, a copper ion sensor based on a UiO-66-NH2/ZnO composite material is proposed. The UiO-66-NH2/ZnO nanocomposite was prepared by an ultrasonic mixing method. The morphology and structure of the nanocomposite were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The sensitivity to Cu(II) is 6.46 μA μM−1 and the detection limit is 0.01435 μM. The composite material is rich in –OH and –NH2 groups, which are active sites for Cu(II) adsorption. The UiO-66-NH2/ZnO-modified electrode has good repeatability and anti-interference ability. The sensor was successfully used for the determination of Cu(II) in an actual water sample.
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高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Xiaowen Su,Shan Wu,Xiaoxing Long,Yan Shi,Qi Pan,Jixin Su
Preventing climate change and achieving carbon neutralization depend on strengthening the carbon cycle in industry and limiting carbon emissions to ambient air. Our aim is to reduce CO 2 to valuable CO by gas-solid photo-catalytic reduction under sunlight. We prepared catalysts by one-step synthesis with graphene oxide (GO) and ZnO, surface modified with a monolayer of sulfonated cobalt phthalocyanine (CoPcS), which were calcined to obtain photocatalyst samples containing Co(II), ZnO and reduced graphene oxide (rGO). Results of TEM, SEM-EDS, XRD, XPS, PL and ESR revealed that the photocatalyst samples possessed a hybrid layer microstructure, heterojunction, and excellent electron-hole pair separation. Evaluation of the photocatalytic reduction reactivity showed that CO selectivity reached 96.2–99.0% and top CO yield was 26.15 µmol.g −1 .h −1 .
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高影响因子
APPLIED SURFACE SCIENCE
·
2010
·
IF 1.616
Zhi Cao,Zhijun Zhang
Tetraethyl orthosilicate (TEOS) and dimethyldiethoxysilane (DEDMS) were used as co-precursors to prepare organically modified silica (ormosil) via sol–gel process. The resultant ormosil was adopted for surface-capping of ZnO nanoparticle, where methyl (organic functional group) and silica (inorganic component) were simultaneously introduced onto the surface of the nanoparticles for realizing dual surface-modification. The ormosil-capped ZnO nanoparticle showed strong hydrophobicity and good compatibility with organic phases, as well as effectively decreased photocatalytic activity and almost unchanged ultraviolet (UV)-shielding ability. More importantly, the comprehensive properties of ormosil-capped ZnO nanoparticle could be manipulated by adjusting the molar ratio of TEOS to DEDMS during sol–gel process. This should help to open a wider window to better utilizing the unique and highly attractive properties such as high UV-shielding ability and high-visible light transparency of ZnO nanoparticle in sunscreen cosmetics.
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高影响因子
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