INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Zhifeng Zhao,Qingtao Zhu,Qiuyun Chen,Junjie Ma,Lijun Zhou,Siru Su,Jiabin Chen,Zhigao Liu,Quanping Yuan
The study systematically explored the effects of the combination of CNF and PVA on PVA-CMZ composite films. • PVA-CNF dual-network structure possesses high specific surface and abundant active sites. • The abundant binding of ZnO is promoted by the active sites on the above structure. • The interface interaction formed by the oxygen-containing groups of CNF and PVA makes the overall bonding tighter, where tensile strength of composite films reaches 72.50 ± 7.39 MPa. • V OC and I SC of PENG reaches 10.11 V and 698 nA under pressure of 100 kPa respectively. High-performance and environmentally friendly piezoelectric films based on biomass have received extensive attention recently. Among them, wooden cellulose nanofiber (CNF) has become a research hotspot for its low cost, high flexibility and good biocompatibility. In this work, the interwoven PVA-CNF dual-network structure with abundant active sites for its high specific surface was constructed by adding CNF and polyvinyl alcohol (PVA) with abundant oxygen-containing groups, in which MXene was also added as filler, as well as that ZnO was synthesized in the MXene and dual-network substrate via an efficient two-step hydrothermal process to obtain PVA-CNF/MXene@ZnO (PVA-CMZ) composite film. The abundant active sites on the surface of the dual-network structure promote the in-situ synthesis and binding of a large amount of ZnO, further enhancing the overall piezoelectric performance. Moreover, a strong interface interaction is formed by the abundant oxygen-containing groups of CNF and PVA in the assembly process, by which the tight bonding interface among the fillers is practically conducive to the charge and stress transfer, thereby enhancing the overall piezoelectric and mechanical performance. Therefore, the longitudinal piezoelectric constant and tensile strength of the composite film can reach as high as 16.05 ± 0.63 pC·N −1 and 72.50 ± 7.39 MPa respectively, along with the open-circuit voltage and short-circuit current of 10.11 V and 698 nA under a pressure of 100 kPa. Furthermore, it can charge commercial capacitors of specification efficiently, which can still generate stable output under the periodic cyclic force of 5000 s.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Keying Tang,Yilong Fan,Yi Han,Zhifan Zhao,Dianchun Ju,Chunyu Chen
A flower-like MgAlZn layered double oxide/zinc oxide composite (MgAlZn-LDO@ZnO) was prepared through the thermal conversion of a Zn-regulated MgAlZn layered double hydroxide (MgAlZn-LDH) precursor and subsequent coupling with ZnO obtained by a deep eutectic solvent (DES)-assisted route. Different from conventional LDH/LDO-based composites mainly constructed by direct component combination, this work uses Zn²⁺ as a structural regulator to control the growth and assembly of LDH nanosheets, reduce excessive stacking, and promote the formation of a more dispersed three-dimensional flower-like architecture. After calcination, the hierarchical morphology of the precursor was largely retained, and ZnO was uniformly attached to the surface of MgAlZn-LDO. Compared with MgAl-LDH, the obtained MgAlZn-LDO@ZnO composite showed a larger specific surface area, a more developed pore structure, and improved surface hydrophilicity. Photoelectrochemical results showed that MgAlZn-LDO@ZnO possessed a higher photocurrent response and lower charge-transfer resistance than the corresponding LDH precursor, indicating improved separation and migration of photogenerated charge carriers. Under identical reaction conditions, 95.3% of basic fuchsin (BF) was removed within 50 min by MgAlZn-LDO@ZnO, whereas the removal efficiencies of MgAl-LDH and pure ZnO were 52% and 59%, respectively. Radical trapping experiments showed that ·OH was the dominant active species, while ·O₂⁻ also participated in the photocatalytic oxidation process. DFT calculations indicated that the amino groups and adjacent conjugated regions of BF were more likely to be attacked by reactive species. The enhanced adsorption-assisted photocatalytic removal performance was mainly ascribed to the combined effects of Zn²⁺-regulated structural dispersion, LDO-assisted interfacial enrichment, and ZnO-driven charge separation, which together promoted the adsorption–photocatalytic degradation of BF. Download: Download high-res image (192KB) Download: Download full-size image
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Solar RRL
·
2023
·Vol. 7
·期 11
·2300019
·
IF 7.9
Chunyan Wu,Shuo Ding,Lijian Zhang,Fangcheng Huang,Ganhua Qiu,Jinpeng Yang,Fayin Yu,Tao Sun,Lei Qian,Chaoyu Xiang
Enhancing the absorption of incident light and promoting the effective separation of carriers are two effective strategies to improve the power conversion efficiency of lead sulfide quantum dots (PbS CQDs) solar cells. Herein, a simple solution spin-coating method to synthesize a novel ZnO electron transport layer with a wrinkled surface structure is developed. ZnO-wrinkled surface structure can enhance the absorption of PbS CQDs solar cells in the range of 600–1000 nm compared with the normal planar ZnO film, leading to the enhancement in the short-current density. Further, by combining the wrinkled and planar ZnO to form a bilayer ZnO, the energy band alignment between ZnO and PbS CQDs is more suitable for the carrier transmission. Finally, PbS CQDs solar cell based on the bilayer ZnO yields a champion efficiency of up to 13.5%, presenting almost 10% enhancement compared to that based on the single planner ZnO. This method provides a simple and cost-effective method to enhance the efficiency of PbS CQDs thin-film solar cells.
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 28
·9570-9577
·
IF 6.4
Na Chen,Wan-Xiong Yong,Tuo-Dong Xiong,Guo-Dong Fu
The development of viologen-based photochromic composite materials with a fast response to ultraviolet light has become a major research focus. In this paper, we fabricated viologen-based composite films with excellent durability and rapid photochromic performance by the solution casting method. The films changed color within one second when exposed to ultraviolet light (3 W, 365 nm). This was because ZnO NPs photogenerated electrons that enhanced the photoreduction of viologens with matched energy bands. The decoloration process of the films could be regulated by different moisture levels while keeping their photochromic properties unaffected. Moreover, the films exhibited less than 15% change in absorbance over 20 repeated coloring and fading cycles. Therefore, the excellent photoresponsiveness, repeatability and environmental friendliness of the films provide them potential for applications in areas such as rewritable paper, solar UV detection, smart windows and anti-counterfeiting.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Fuyuan Han,Xue Ye,Xinhua Gao,Jinghao Yu,Lisheng Guo,Jie Li
ZnO/ZrO 2 solid solution was introduced as the catalyst for synthesizing dimethyl carbonate (DMC) from propylene carbonate (PC) and methanol. Homogeneous catalysts with strong alkaline nature are the current main catalysts for this reaction. Therefore, to supplant the former with a more applicable multiphase one, it is necessary to construct stable and efficient alkaline active centers on the surface of solid catalysts. The ZnO/ZrO 2 solid solution created defective structures of coordinative unsaturation in the form of oxygen vacancies (O V ) by substituting Zn atoms for Zr atoms in ZrO 2 crystals. Characterizations showed that electrons were transferred to the surrounding Zn atoms upon the formation of these O V , leading to a local enrichment of electrons and the formation of basic active centers. The number of oxygen defects and the alkalinity were effectively regulated by changing the ratio of the two metal atoms in the solid solution. Experiments demonstrated that the catalyst had the best DMC selectivity (92.2%) and the highest DMC yield (57.2%) at a 1:1 ratio of Zn to Zr, at 160 °C and 4 h. This superior performance not only establishes the feasibility of solid solution catalysts in synthesizing DMC but also provides a new perspective on the essential understanding of the active centers of such catalysts.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 24
·15735
·
IF 6.208
Zhe Luo,Yang Zhang
Wood dyeing is an effective way to alleviate the supply-demand imbalance of valuable wood and improve the surface decoration of fast-growing wood. However, applications of dyed wood are limited due to the susceptibility of dyes and wood to photo-discolor and degrade under light irradiation. Thus, the improved weather resistance of dyed wood is crucial. To prevent photochromic discoloration of dyed wood, an anti-photochromic coating structure was constructed via layer-by-layer self-assembly (LbL) using chitosan and zinc oxide (ZnO). The results showed that the surface color difference of treated dyed wood was reduced by approximately 84.6% after the first 2 h of irradiation under the following conditions °C: temperature (50 °C), relative humidity (55%), and irradiation intensity (550 W/m2). However, the color of untreated dyed wood drastically changed at this stage. The reason for the decrease was that the redness and yellowness of treated dye wood were significantly reduced. The deposition of ZnO onto treated dyed wood helped to protect the wood from UV light irradiation. Chitosan bridged the dyes and complexed ZnO to enhance UV resistance. This study provides valuable information for the protection of dyed wood against light discoloration that can be used as an interior and exterior decorative material.Keywords:dyed wood;UV;chitosan;ZnO;photochromic;assembly
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Jiangsheng Li,Zhu You,Benchao Zheng,Shiyi Zhai,Kuangda Lu
Despite that radiotherapy (RT) is a prevalent treatment of cancer, enhancing tumor dose deposit and reversing resistance are two major challenges in its clinical application. Here, we report Au–ZnO (AZ) nano matches that drastically increase reactive oxygen species (ROS) generation and alleviate hypoxia in RT on triple-negative breast cancer. Upon X-ray irradiation, Au increases X-ray attenuation and excites the adjacent ZnO by electron scattering, electron transfer, and energy transfer. Meanwhile, Au plays the role of a reservoir of electrons that promotes the charge separation in ZnO, thereby significantly improving the ROS production efficiency and causing the ROS burst. The ROS generation efficiency of AZ is determined to be 2.03 times that of Au. In contrast, a physical mixture of Au and ZnO only slightly increased the ROS generation compared to Au (1.18 times). Moreover, AZ catalyzes H2O2 decomposition to produce oxygen at excited states, thus modulating tumor hypoxia. Clonogenic assay showed that AZ had efficient radiosensitization with radiation enhancement factors of 4.01 and 3.50 in 4T1 breast cancer cells under normoxia and hypoxia, respectively. AZ-enhanced RT can successfully eliminate or shrink tumors (two of the six were completely removed) upon 4 Gy of X-ray irradiation on 4T1 tumor-bearing mice. At the end point, the average tumor size in AZ with the RT-treated group was only 1.8% of that of PBS with RT, significantly outperforming the other control groups including a physical mixture of Au and ZnO nanoparticles at the same concentrations..
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Qing Li,Xiaojie Zhuang,Guanhong Zhou,Zhenfei Yang,Ting Yang,Hongbo Xiao,Tao Xu,Wenlei Wang
A novel polyacrylic acid/carboxylated nanocellulose fiber/polyethylene glycol hydrogel loaded with nano-ZnO (ZnO-PAA/CNF/PEG: GH-2 (wt(ZnO)% = 12% and wt(PEG)% = 16%)) was synthesized to remove Cr(VI) from wastewater by adsorption synergistic photocatalytic reduction. The effects of ZnO content, PEG content and pH on the removal efficiency of Cr(VI) were investigated. The removal performance and mechanism of Cr(VI) by hydrogels were systematically studied by various techniques. The results showed that when the initial pH = 2, the initial concentration of Cr(VI) = 20 mg/L, the hydrogel dose = 0.5 g/L, and Irradiation power of mercury lamp was 500 W, the removal efficiency of Cr(VI) was 97.22% (dark adsorption for 60 min and photocatalysis for 50 min). The addition of PEG greatly reduced the agglomeration of nano-ZnO in GH-2 and facilitated the separation of photogenerated electron-hole pairs. The adsorption process of Cr(VI) by GH-2 accords with pseudo-second-order kinetics. The photocatalytic process conforms to the pseudo-first-order reaction kinetics. Under the optimal experimental conditions, the removal efficiency of Cr(VI) by GH-2 was still as high as 87.99% after 5 cycles. The removal mechanism of Cr(VI) was mainly through electrostatic attraction, chemical adsorption and photocatalytic reduction. This study provides a feasible method for the synthesis of hydrogel materials with excellent adsorption synergistic photocatalytic performance for the treatment of Cr(VI)-containing wastewater.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Zi-ang Zhang,Li-fan Nie,Quan Zhou,Zhi-Dan Song,Ge-bo Pan
The structure and morphology of gas-sensitive materials were extremely important to performances of gas sensor. In this work, ZnO nano-crystalline (ZnO NCs) was synthesized on foam-like GaN (F-GaN) by sol-gel method as gas-sensitive materials of H 2 S gas sensor. When ZnO NCs/F-GaN composite structure was used as gas- sensitive materials for detection of H 2 S with the concentration of 50 ppm at 220 °C. Importantly, rapid response and recovery time was 78 and 31 s, respectively. Enhancement of the sensing response was mainly attributed to the combination between ZnO NCs and F-GaN. In addition, a multiphase catalytic mechanism was proposed to description the catalytic role of F-GaN in the gas sensing procedure. These results further broadened the application of as-prepared metal oxide semiconductor based GaN in the gas sensing field.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Shaofei Guo,Xiaoyu Chen,Yuetao Ling,Han Wang,Xin Wei,Ruihua Pan,Peng Wang
A highly sensitive electrochemical nanostructure sensor based on a ZnO@ZIF-8 nanocomposite-modified carbon paste (ZnO@ZIF-8/CPE) electrode was constructed for trace analysis of sulfamethoxazole (SMX). ZnO@ZIF-8 was synthesized by the hydrothermal method and characterized using scanning electron microscopy and X-ray diffraction. Electrochemical experiments demonstrated a synergistic effect of ZnO and ZIF-8 that endowed the prepared sensor with excellent electrocatalytic behavior towards SMX oxidation. Under optimal conditions, the ZnO@ZIF-8/CPE sensor demonstrated a wide linear range of 0.04-50 μM for SMX and a regression coefficient of 0.9914 and a limit of detection of 0.02 μM. The sensor possessed good stability, selectivity, anti-jamming ability and reproducibility and was successfully used for SMX determinations in egg samples. The proposed sensor is ready to use for biomedicine and environmental protection monitoring.
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ChemistrySelect
·
2023
·Vol. 8
·期 28
·e202301088
·
IF 2.1
Hui Zhou,Xiaoliang Sun,Wenming Guo,Tingting Bao,Yi Zhang,Chenxu Guo,Hanning Xiao,Hang Qin,Pengzhao Gao
Graphical [+] These authors contributed equally to this articleDurable CuO/ZnO/CeO 2 /ZrO 2 catalyst on SiC support for methanol steam reforming was prepared by the combination of inverse microemulsion method and precipitation method. The methanol conversion of the catalyst was still reached 98.8 % after 150 h, considerably higher than that of solution combustion method (70 %), without carbon deposition and pronounced sintering after the reaction. Durable CuO/ZnO/CeO 2 /ZrO 2 catalyst on SiC support for methanol steam reforming (MSR) was prepared by the combination of inverse microemulsion method and precipitation method which is termed as inverse microemulsion/precipitation method. The presence of Ce−O−Zr solid solution facilitated the production of oxygen vacancies and Ce 3+ species in the prepared CuO/ZnO/CeO 2 /ZrO 2 catalyst. Owing to the unique tiny reaction pool and the addition of precipitant for inverse microemulsion/precipitation method, the particle size of the prepared catalyst was principally between 2 and 6 nm, with an average size of 3.66 nm. Besides, the small particle size and the highly dispersed of Cu species boosted the reduction performance of the catalyst, enabling the reduction temperature to be only 201 °C. The methanol conversion of the reduced catalyst was still reached 98.8 % after 150 h, considerably higher than that of solution combustion method (70 %), without carbon deposition and pronounced sintering after MSR reaction.
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 103
·期 3
·876-889
·
IF 2.606
Luo Qiuzi,Sun Yihua,Lv Xin,Huang Long,Fang Liang,Wang Rui
Al and Ga were co-doped into ZnO lattice (AGZ) by the sol–gel method. Herein, graphite carbon nitride (g-C 3 N 4 ) was synthesized by using the thermal decomposition method, which was used to integrate with the obtained AGZ to create direct Z-scheme Al/Ga co-doping biphasic ZnO/g-C 3 N 4 heterojunction by the simple single-phase dispersion method. The synthesized catalysts of composition, optical properties, topography structure and chemical state of element of the prepared AGZ/g-C 3 N 4 composites were analyzed by XRD, FT-IR, UV, PL, TEM and XPS respectively. The results have shown that the combination of AGZ and g-C 3 N 4 to form a direct Z-type heterojunction can effectively reduce the band gap of AGZ, thereby shifting the absorption edge to the visible light region. The PL spectroscopy study of the synthesized sample found that, compared with bare g-C 3 N 4 or AGZ catalyst, AGZ/g-C 3 N 4 significantly reduced the recombination of photogenerated electrons and holes, thereby ensuring that more reactive groups participate in the dye degradation process. The degradation experiment of methylene blue(MB) dye verifies that the AGZ/CN sample has excellent photocatalytic performance. Al/Ga co-doped ZnO/g-C 3 N 4 catalyst showed the maximum photocatalytic MB degradation of 95.4% after 150 min in visible light illumination, while the degradation efficiency of ZnO and g-C 3 N 4 are only 30.5% and 50.1%, respectively. It have observed that ·O 2 − , ·OH and h + radicals were the main active species that affect the photocatalytic degradation of dyes by radical trapping experiment. In addition, the heterojunction formed by AGZ and g-C 3 N 4 inhibited the photocorrosion of ZnO, which was confirmed by these five consecutive dye degradation tests. At the same time, in order to determine the optimal compounding ratio, four groups of AGZ/CN with different ratios were prepared. It was found that AGZ/CN15 has the highest catalytic efficiency, and the degradation of MB reached 94% within 2.5 h. This work will open up a new path for the development of more effective photocatalysts for organic matter treatment.
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危险品化学品经营许可证（带存储）