Sustainable Materials and Technologies
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2024
·
IF 8.6
Siyue Fu,Jianhua Zhou,Guojing Wu,Wenping Liu,Haiqing Qin,Chenyan Liu,Tomohiro Sato,Ying Peng,Lei Miao
The conceptual design of yolk-shell structured Si/C composite materials is considered an effective approach to enhancing the structural stability of silicon-based anode materials over long cycles. Here, for the first time, zinc oxide is used as both the internal sacrificial layer and the external coating layer reactant, allowing it to be transformed into voids and the carbon layer precursor during subsequent operations. These internal voids can buffer the volume expansion of silicon, ensuring the electrode's integrity during cycling. The ZIF layer formed through in-situ solvothermal reactions can effectively reduce the occurrence of isolated ZIF in the solvent, resulting in better coating of the nano‑silicon particles. Compared to traditional processes for preparing yolk-shell structures, this gentle synthesis strategy avoids the use of HF, offering a new direction for large-scale production. This optimized yolk-shell Si/C-0.70 M electrode exhibits excellent rate performance (specific capacity of 988 mA h g −1 at a high current density of 2 A g −1 ) and long-term cycling stability (specific capacity of 722 mA h g −1 after 300 cycles at a current density of 0.5 A g −1 ; reversible specific capacity of 557 mA h g −1 after 500 cycles). Therefore, this scalable study offers a new approach for safely producing yolk-shell anode materials with high cycle stability on a large scale.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zhuqing Jin,Xia Feng,Yi Hou,Haikui Zhu,Lixi Wang
Enhancing the microwave attenuation performance under high-temperature and oxidative conditions is a forefront issue for electromagnetic absorption materials. SiC nanowire material exhibits great potential due to its superior thermal stability and oxidation resistance. While, the relatively poor dielectric loss limits its further application as a high effective absorber. In this study, the strategy of laminated porous structure design, as well as the composition of ZnO nanocrystals were applied to promote the microwave attenuation capacity. A simple dual hydrolysis reaction method was employed to grow ZnO nanocrystals on SiC nanowires, followed by the preparation of a 3D layered structure of ZnO/SiC nw aerogel material using directional solidification processes. The ZnO/SiC nw aerogel demonstrated effective broadband attenuation (>90 %) across the entire X-band from room temperature to 873 K. Moreover, the material chemistry remained constant at temperatures as high as 1073 K in air. It exhibited ultralightweight properties and possessed a low thermal conductivity of approximately 0.056 W/m·K, with a density of 0.167 g/cm 3 . The combination of its lightweight, oxidation resistance, thermal insulation, and attractive X-band absorption efficiency positions ZnO/SiC nw aerogel as a promising EM absorption candidate at both room and high temperatures.
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Sustainable Energy & Fuels
·
2024
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IF 5
Xueyang Ren,Jie Zheng,Jinxian Zhao,Jun Ren,Yanhong Quan
The one-step oxidative esterification of ethylene glycol (EG) is an effective and promising route for methyl glycolate (MG) synthesis, during which the development of efficient catalysts is critically crucial. Herein, Au/ZnO catalysts were prepared using impregnation (IM), colloidal-deposition (CD), deposition-precipitation (DP) and co-precipitation (CP) methods, respectively. The catalytic activities results revealed that the Au/ZnO-DP catalyst was far superior than the other three catalysts, achieving an EG conversion rate of 90.4% and a selectivity towards MG of 93.8%. Catalysts were systematically characterized by N2 adsorption-desorption, XRD, TEM, XPS, H2-TPR, EPR, O2-TPD and CO2-TPD. The results showed that the large number of Au-ZnO interfaces facilitated the adsorption and activation of O2. Moreover, it is found that the basic sites promoted the cleavage of O-H bonds in the EG molecules, and the acidic sites are responsible for the selectivity of MG. This work offers a simple strategy for design of gold catalysts in EG oxidative esterification.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2018
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IF 5.667
Zhiqing Yang,Yi Wang,Dun Zhang
New approach for fabrication of photoelectrochemical sensing platform has been demonstrated for sulfate-reducing bacteria (SRB) detection based on biosynthesis of CdS quantum dots (QDs) sensitizing ZnO nanorod arrays. ZnO nanorod arrays were synthesized on the FTO substrate via galvanic-cell-based approach and then silanized by (3-Aminopropyl)triethoxysilane (APTES) with amino groups to introduce Cd 2+ . By taking advantage of the characteristic bacterial metabolite (H 2 S) reaction with Cd 2+ , CdS QDs can be biosynthesized on the surface of ZnO nanorod and significant enhancement of photocurrent due to the formation of CdS/ZnO heterostructures. The fabricated PEC sensing platform showed detection sensitivity of 32 cfu/mL for SRB. The current work can provide new strategies to construct advanced PEC sensing platforms for detections of physiologic messenger molecules (H 2 S).
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Chinese Physics B
·
2018
·Vol. 27
·期 1
·018503
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IF 1.321
Shuaipu Zang,Yinglin Wang,Meiying Li,Wei Su,Meiqi An,Xintong Zhang,Yichun Liu
Depleted bulk heterojunction (DBH) PbS quantum dot solar cells (QDSCs), appearing with boosted short-circuit current density ({J}_{\mathrm{sc}}), represent the great potential of solar radiation utilization, but suffer from the problem of increased interfacial charge recombination and reduced open-circuit voltage ({V}_{\mathrm{oc}}). Herein, we report that an insertion of ultrathin Al2O3 layer (ca. 1.2 Å thickness) at the interface of ZnO nanowires (NWs) and PbS quantum dots (QDs) could remarkably improve the performance of DBH-QDSCs fabricated from them, i.e., an increase of {V}_{\mathrm{oc}} from 449 mV to 572 mV, {J}_{\mathrm{sc}} from 21.90 mA/cm2 to 23.98 mA/cm2, and power conversion efficiency (PCE) from 4.29% to 6.11%. Such an improvement of device performance is ascribed to the significant reduction of the interfacial charge recombination rate, as evidenced by the light intensity dependence on {J}_{\mathrm{sc}} and {V}_{\mathrm{oc}}, the prolonged electron lifetime, the lowered trap density, and the enlarged recombination activation energy. The present research therefore provides an effective interfacial engineering means to improving the overall performance of DBH-QDSCs, which might also be effective to other types of optoelectronic devices with large interface area.
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CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Dongkun Xiao,Yang Wang,Dongxiang Zhang,Yingmin Liu,Haoran Wang,Yalin Li,Huizhen Wei,Shijie Wang,Minglong Sun,Mojie Sun
Rapid and effective hydrogen sulfide ( H 2 S ) detection is vital to ensure safety in industrial environments, where it is a common toxic gas. This study utilized Zn-based metal-organic frameworks (MOFs) as precursors to prepare hollow nanocage structure-like CuO/ZnO sensors. By optimizing the ratio of CuO to ZnO, the resulting CuO/ZnO nanomaterials demonstrated ultra-high sensitivity and a swift response to low H 2 S concentrations. The experimental results show that, thanks to its unique nanocage structure and abundant active sites on the surface, the sensor responds up to 3423 to 10 ppm H 2 S with a response time of only 10 s. In addition, the sensor exhibits good stability, selectivity and low lower detection limit at a low operating temperature of 115 °C, and the lower limit of detection for H 2 S reaches 100 ppb (3.04). Furthermore, the examination of the gas-sensing mechanism exposed the collaboration of CuO/ZnO nanocages in gas adsorption and electron transportation. Remarkably, the generation of p-n heterostructures greatly enhanced the sensitivity and selectivity towards H 2 S , while providing a model for constructing and producing high-performance and enduring sensors.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Xin Sun,Yuchan Meng,Keling Hu,Jinming Sun,Chunyu Zhou,Chengkun Su,Lihui Zhang,Chunhong Zhang,Zhengfeng Ma
The poly(L-lactic acid) (PLLA)/ZnO composite membrane with cluster assemblies microstructure was constructed by a combination of non-solvent induced phase separation (NIPS) and the Breath-Figure method. In this novel method, the controllable diffusion rate between solvent and non-solvent was introduced to the system by adjusting the non-solvent solubility parameters. The humidity was adjusted to control non-solvent solubility parameters in the Breath-Figure method, which avoids the instantaneous phase separation induced by direct coagulation of water droplets. Hydrophobic modified ZnO nanoparticles were used as heterogeneous nucleation points to induce PLLA crystallization and formation of micro-nano structures. Controlling molecular chain growth with crystal nuclei as templates and constructing cluster assemblies microscopic morphology at 99 % humidity, and the size of the cluster decreases gradually from 10 μm to 3 μm as the nanoparticles content increased up to 5 wt%. The surface water contact angle could reach 153.8° with cluster morphology. In addition, the porous structure formed by the polymer-lean phase could increase the porosity to 93.1 % and exhibit an excellent oil absorption capacity up to 12.64 g/g. It is foreseeable that porous PLLA/ZnO composite membranes have potential applications as biodegradable oil-water separation materials.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Huashuai Wang,Can Hao,Lingyun Chen,Dunyi Liu
Cadmium (Cd) pollution poses a significant threat to food safety and human health. Foliar spraying of nanomaterials has been widely used to mitigate Cd stress in agriculture. However, the effects and synergistic mechanisms of various nanomaterial combinations on Cd resistance remain unclear. This study compared the impacts of Fe 3 O 4 nanoparticles (NPs), ZnO NPs, and their combinations at different concentrations (50–400 mg/L) on the growth and physiology of peanuts under Cd-stress. Results showed that combined-NPs reduced Cd accumulation and enhanced plant growth more effectively than single-NPs. Specifically, the concentrations of Cd in roots and shoots were reduced by 52.13 % and 47.83 %, respectively, while biomass increased by 42.86 % for roots and 100.17 % for shoots. A concentration of 150 mg/L of combined NPs was optimal, reducing root Cd concentration from 0.619 mg/g to 0.245 mg/g and shoot from 0.187 mg/g to 0.148 mg/g. Transcriptomic analysis revealed that combined NPs upregulated oxidative stress-related genes ( GST23 , POD2 ) to strengthen antioxidant defenses. Simultaneously, they also downregulated metal transports ( ABCC2 , Nramp2 , ABCG29 , ABCG2 ), potentially limiting Cd uptake. These findings reveal the synergistic mechanism of enhancing antioxidant systems and regulating metal transport pathways, offering a new strategy to develop combined nano-fertilizers that combat Cd pollution in similar crops.
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Surfaces and Interfaces
·
2024
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IF 5.7
Liang Guo,Yuming Wen,Feng Li,Chuchu Tang,Yang Yang,Shunhui Wang,Zhen Wang,Shun'an He
Graphene oxide-based membranes, known for unique permeability and selectivity in oil/water separation, face limitations due to low flux and weak anti-fouling performance. To overcome these challenges, a series of GO@ZnO membranes were synthesized in a one-pot process, doping different amounts of nano-ZnO into GO with the aid of polydopamine (PDA) and 3-triethoxysilylpropylamine (KH550). This study found that evenly distributed nano-ZnO within the GO layers acted as hydrophilic intercalators, creating continuous rough nanochannels and increased interlayer spacing for effective water transport. The membrane M-5 demonstrated a significant increase in water permeability, reaching 5718 ± 151 L m −2 h −1 bar −1 , nearly 20 times higher than the control group (M-0) without ZnO doping. Anti-fouling tests, using four different oil/water emulsions, showed that M-5 consistently achieved oil rejection rates above 99.7 %. Furthermore, M-5 exhibited a flux recovery rate (FRR) of 95.5 %, surpassing M-0 by 34.6 %. Regeneration experiments confirmed that M-5 maintained an impressive oil rejection rate of 99.2 % after 30 recycling cycles. These results indicate that nano-ZnO enhances surface roughness and hydration layers, significantly improving water permeability without compromising rejection rate and anti-fouling performance. The study presents a straightforward approach to creating continuous nanochannels and hydrophilic layers in two-dimensional laminar GO membranes, highlighting the potential of GO@ZnO membranes in oil-water treatment applications.
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Environmental Science-Water Research & Technology
·
2024
·
IF 3.5
Qin Long,Haonan Wu,Junfeng Li,Yuting Lin,Xiaoqing Zhou,Yi Huang,Peicong Zhang,Qin Zou,Rui Zhang
Effectively removing emulsions and dyes simultaneously from the mixed wastewater is challenging. In this study, we chose wood fiber as a supporting material. ZnO was uniformly grown on the surface of the wood fiber by a one-step hydrothermal method. After freeze-drying, ZnO/wood fiber composite was successfully created, which was kelp-shaped wood fiber (width dimensions of 25-50 μm) loaded with short rod-shaped ZnO (diameter dimensions of 5-25 nm and length dimensions of 15-100 nm). The composite was hydrophilic and oleophobic and had excellent antibacterial characteristics (>99.94%). The effectiveness of the composite in the separation of oil-in-water emulsions stabilized with a surfactant could reach 99.31%, owing to the ZnO enhanced emulsion breaking and separation capabilities. In addition, ZnO may interact electrostatically with dye molecules, allowing for 99.92% efficiency in dye adsorption during emulsion separation. Then, ZnO provided ZnO/wood fiber composite photocatalytic degradation of dyes, which allowed for repeated recycling of ZnO/wood fiber composite, resulting in 98.80% emulsion interception and 99.90% dye removal after five cycles. The environment friendly ZnO/wood fiber composite has remarkable multifunctionality for emulsion separation, dye adsorption, self-cleaning, and antibacterial properties, which provides a novel treatment option for mixed emulsion and dye wastewater.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Guopan Sun,Shanfu Sun,Yinglin Wang,Xidong Hao,Yue Hao,Chao Liu,Caili Gong,Qianyong Yang,Weian Du,Pengfei Cheng
Developing efficient drug-detecting technologies is critical to the fight against their related abuse and trafficking crimes. In the present work, a novel morphine detection device based on metal-oxide-semiconductor (MOS) gas sensors with low-cost, highly sensitive, and portable is designed and fabricated. The exclusive sensitive material, ZnO nanoparticles self-assembly porous networks (ZnO-N) with ample oxygen vacancies (O V ) defects prepared by PVP-chelated precipitation followed by a chemical blowing calcination method, is decisive to morphine drug identification. O V defects can modulate the intrinsic electronic structure and endow ZnO-N with more suitable band structures for enhancing oxygen species adsorption and morphine molecules oxidation. The optimal ZnO-N-2 sensor exhibits positive linear relationship response values of 1.1–8.8 in the concentrations of 2–200 ppm toward the standard morphine drug sample at the optimal operating temperature of 250°C. More importantly, the homemade portable device equipped with the ZnO-N-2 sensor can accurately identify the morphine drug and perform early warning. This work innovatively demonstrates the feasibility of MOS gas sensors for the detection of stashing morphine drugs in methanol, which is of great significance for effectively combating global drug-related crimes.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Guangyang Jiang,Yicheng Yang,WenYang Sheng,Li Yang,Huan Yang,Tingting Tang,Chenzhi Wang,Yongqiang Tian
The κ-carrageenan/microbial-originated dextran-based multifunctional intelligent packaging films, integrated with natural anthocyanins as a colorant and ZnO as an antibacterial agent, were successfully developed using a casting method. Their applicability and functionality were systematically assessed through various analytical techniques. The addition of dextran, anthocyanins, and ZnO in the films resulted in an increased tensile strength (from 13.66 ± 0.53 to 29.70 ± 1.29 MPa) and elongation at break (from 16.69 ± 1.05 % to 39.49 ± 0.73 %), and decreased water solubility (from 64.94 ± 0.34 % to 32.84 ± 1.55 %) and water vapor barrier property (from 8.29 ± 0.12 × 10 −10 g/m•s•Pa to 6.92 ± 0.1 × 10 −10 g/m•s•Pa). Spectroscopic analysis revealed that the dextran, ZnO and anthocyanins were uniformly dispersed within the film-forming substrates, achieved through hydrogen bonds and electrostatic interactions. The addition of anthocyanins and ZnO not only enhanced the antibacterial and antioxidant properties of the film but also provided it with good pH sensitivity and color stability, making it highly promising for use in shrimp freshness monitoring. All the films were shown to be biodegradable, decomposing completely in soil within 30 days. Overall, these results suggest that the films could serve as a potential replacement for plastic food packaging and additionally monitor the freshness of food.
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