SCIENCE OF THE TOTAL ENVIRONMENT
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2018
·
IF 4.61
Lingling Zhang,Zhaoxi Zhang,Xi He,Lei Zheng,Shikun Cheng,Zifu Li
Engineered nanoparticle materials (ENMs) are widely and increasingly produced and employed in many sectors. The use of diverse ENMs potentially leads to the release of multiple ENMs into the environment. These ENMs after discharge will be end in wastewater treatment plant and present in sludge. This work investigated the effect of multi-ENMs systems of ZnO and TiO 2 on sludge anaerobic fermentation and the related toxicity mechanism. Results revealed that the toxicity of ZnO ENMs on anaerobic fermentation was reduced in the presence of TiO 2 ENMs. Investigation on the change of free Zn 2+ and reactive oxygen species ( OH and H 2 O 2 ) suggested that both of free Zn 2+ and ROS contributed to the toxicity mechanism. Zn 2+ decrease was the main reason for the reduced toxicity in multi-ENMs systems. ROS mainly led to the reduction of cell viability in anaerobic fermentation systems. The presence of TiO 2 in the multi-ENMs systems promoted the recovery of enzyme activity, cell viability and bacteria abundance.
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BIOSENSORS & BIOELECTRONICS
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2018
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IF 8.173
Jinhui Feng,Faying Li,Xiaojian Li,Yaoguang Wang,Dawei Fan,Bin Du,Yueyun Li,Qin Wei
A new, photoelectrochemical immunosensor was proposed on the basis of the La-CdS/3D ZnIn 2 S 4 /Au@ZnO sensitization structure for detection of aminoterminal pro-brain natriuretic peptides (NT-proBNP). The Au@ZnO-modified electrode was first assembled with 3D ZnIn 2 S 4 , and then further deposited with lanthanum doped cadmium sulfide (La-CdS) via successive ionic layer adsorption and reaction strategy. The Au@ZnO has excellent photoelectric activity and electrical conductivity . The ZnIn 2 S 4 with 3D architectures not only exhibit high photocurrent intensity under visible-light irradiation but also have large surface for the La-CdS deposition. Meanwhile, the La-CdS doped structure could depress the charge recombination, which effectively promotes separation of the generated electron-hole (e - /h + ) pairs and consequently enhances the photocurrent conversion efficiency. The polydopamine (PDA) was used not only as a cross-linker reagent for the immobilization of the anti-NT-proBNP but also as an electron donor for promoting the photo-generated e - /h + separation of the semiconductors. Under optimal conditions, the well-designed photoelectrochemical immunoassay exhibited a low detection limit of 0.32 pg mL −1 and a wide linear range from 0.8 pg mL −1 to 45 ng mL −1 for target NT-proBNP detection. Meanwhile, it also presented good reproducibility, specificity, and stability and might open a new promising strategy for the detection of other important tumor markers.
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CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Chunlei Huang,Jinjun Wen,Yuhai Sun,Mingyuan Zhang,Yunfeng Bao,Yudong Zhang,Long Liang,Mingli Fu,Junliang Wu,Daiqi Ye,Limin Chen
ZnO plate, dominantly exposed polar high energy (0 0 0 1) plane, was used to load Cu to build Cu/ZnO plate model catalyst. The catalyst was reduced in different atmospheres and then evaluated for CO 2 hydrogenation to methanol. X-ray diffraction, scanning electron microscopy, quasi in situ X-ray photoemission spectroscopy, in situ UV-Raman, and CO 2 temperature programmed desorption characterizations have been carried out. The exploration results indicate that in situ tuning Cu nanoparticle (NP) morphology can be realized through varying reducing atmospheres. H 2 reduction induced the formation of small irregular spherical Cu NPs covered with large amount of migrated Zn, prompting CO 2 conversion and methanol synthesis . However, CO reduction induced the generation of ellipsoidal Cu NPs with medium size and low amount of migrated Zn, leading to poor catalytic performance for CO 2 hydrogenation. CO 2 hydrogenation to methanol displays apparent Cu NP morphology dependency over the Cu-ZnO based catalysts.
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APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Shutao Li,Pengfei Wang,Rendong Wang,Yifan Liu,Ruisen Jing,Zhao Li,Zilin Meng,Yunyan Liu,Qian Zhang
Black phosphorus nanosheets (BPNs) and ZnO nanohybrid was synthesized by a simple one-step co-precipitation method. This BPNs-ZnO nanohybrid exhibited excellent photocatalytic activity under visible light than the bulk black phosphorus (BP), BPNs and ZnO during the process of degrading methylene blue (MB) and ciprofloxacin (CIP). The enhanced photocurrent response, the smaller arc radius in EIS plots and the decreased PL emission of BPNs-ZnO nanohybrid indicated that the recombination of electrons and holes in the composite were suppressed. In addition, the increase of light absorption , the suitable bandgap configuration and the relatively large specific surface area of BPNs-ZnO nanohybrid were proved to boost the photoactivity. The radical trapping experiment revealed that h + and ·O 2 − were the main active species.
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Chinese Physics B
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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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APPLIED ORGANOMETALLIC CHEMISTRY
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2017
·Vol. 32
·期 1
·e3966
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IF 2.319
Shuaishuai Ma,Qing Li,Zhilan Cai,Zhaolian Ye,Yuming Zhou
Novel ZnO/N-doped helical carbon nanotubes (ZnO/N-HCNTs) composites were successfully synthesized via a facile chemical precipitation approach at room temperature. The sample was well characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and ultraviolet–visible diffuse reflectance spectroscopy (UV–vis DRS). The photocatalytic activity was evaluated in the degradation of methylene blue (MB) aqueous solution under UV light irradiation. It is found that ZnO nanoparticles were highly and uniformly anchored on the surface and inner tubes of the N-HCNTs with size of about 5 nm, and significantly enhanced the photocatalytic activity compared to pure ZnO. The enhanced photocatalytic activity of ZnO/N-HCNTs composites can be ascribed to the integrative synergistic effect of effective interfacial hybridization between N-HCNTs and ZnO nanoparticles and the prolonged lifetime of photogenerated electron–hole pairs. Moreover, the ZnO/N-HCNTs could be easily recycled without any obvious decrease in photocatalytic activity and could be promote their application in the area of environmental remediation.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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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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Environmental Science-Water Research & Technology
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2024
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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
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2024
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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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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2017
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IF 4.784
Shuaipu Zang,Yinglin Wang,Meiying Li,Wei Su,Hancheng Zhu,Xintong Zhang,Yichun Liu
Preparation of electron transport layer (ETL) with high uniformity by convenient and low-temperature process is of essential importance for the future development of colloidal quantum dot solar cells (CQDSCs) into large-area and flexible devices. Herein we utilized magnetron sputtering technique to deposit ZnO thin film as the ETL of PbS CQDSCs. The ZnO film deposited at ambient temperature displayed preferential growth along (001) direction, pinhole free morphology, and good optical transmittance . On rigid SnO 2 :F (FTO) conductive glass substrates , PbS CQDSCs with sputtered ZnO ETL achieved a power conversion efficiency of 6.47% under AM 1.5 G simulated solar irradiation , which was higher than the 6.02% efficiency of the CQDSC fabricated on the benchmarked ZnO nanocrystals ETL. The good uniformity of sputtered ZnO film also facilitated the consistency of photovoltaic parameters of big-sized CQDSCs, as demonstrated by the similar output of four series-connected CQDSC units fabricated in one batch with a total active area of 14.4 cm 2 . Flexible PbS CQDSCs was also fabricated on the sputtered ZnO ETL, using In 2 O 3 :Sn-coated polyethylene terephthalate (ITO-PET) as the substrate, which achieved a power conversion efficiency of 3.87% and displayed negligible decline of the photovoltaic parameters after 100-time bending treatment. Our research demonstrates that the magnetron-sputtered ZnO film, with favorable features of low-temperature process, large-area continuity, and high bending tolerance, presents promising potential for the future development of PbS CQDSCs.
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FIBERS AND POLYMERS
·
2016
·Vol. 17
·期 11
·1849-1857
·
IF 1.022
Zhang Bin,Han Jian
The poly(vinyl acetate) (PVAc)/zinc oxide (ZnO) microcapsule and PVAc/titanium dioxide (TiO 2 ) microcapsule were synthesized via in-situ emulsion polymerization method. The PVAc/ZnO microcapsule and PVAc/TiO 2 microcapsule were characterized by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis(TG), transmission electron microscopy (TEM), and UV-visible spectroscopy (UV-vis). Effect of PVAc/ZnO microcapsule and PVAc/TiO 2 microcapsule on properties of poly(lactic acid) (PLA) was evaluated by UV-vis, SEM and mechanical properties test. The results showed that the addition of PVAc/ZnO and PVAc/TiO 2 microcapsules as a UV-blocking additive could significantly enhance UV-blocking property of PLA/PVAc/ZnO microcapsule composites and PLA/PVAc/TiO 2 microcapsule composites compared with pure PLA, PLA/ZnO composites and PLA/TiO 2 composites. The mechanical properties of PLA/PVAc/ZnO microcapsule composites were better than those of PLA/ZnO composites due to good dispersability and compatibility of PVAc/ZnO microcapsule in PLA matrix. Also, the mechanical properties of PLA/PVAc/TiO 2 microcapsule composites were better than those of pure PLA and PLA/TiO 2 composites. This study demonstrates the great potentials of the intrinsically UV shield additive PVAc/ZnO and PVAc/TiO 2 microcapsules in the application of high performance matrix resin and composite material.
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POLYMERS FOR ADVANCED TECHNOLOGIES
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2016
·Vol. 27
·期 11
·1451-1457
·
IF 1.823
Peng Li,Chenguang Yao,Guisheng Yang
Poly(trimethylene terephthalate)/ZnO nanocomposites were successfully prepared by dual in situ polymerization. Firstly, ZnO nanoparticles were synthesized by a simple polyol method using 1,3-propanediol (PDO) as solvent and stabilizer. Then, PTT/ZnO nanocomposites were prepared by in situ polymerization. The results of Fourier transform infrared spectra showed that PTT molecular chains were grafted to the surface of ZnO nanoparticles. The results of 1 H NMR spectra confirmed that propyl ester molecules (as reaction product) were incorporated into PTT molecular chains. It was found that the intrinsic viscosity and molecular weight of synthesized PTT decreased with the addition of ZnO nanoparticles and the incorporation of propyl ester molecules. TEM results showed that ZnO nanoparticles with particle size of 20 ~ 30 nm were well dispersed and fully distributed in the polymer matrix. Besides, the melting temperatures and crystallization temperature decreased gradually and then increased slightly with the increasing loading of ZnO nanoparticles. Because of the strong interaction between ZnO nanoparticles and PTT matrix, the thermal stability of PTT/ZnO nanocomposites was improved. Interestingly, the results of Polarized Optical Microscopy showed that banded spherulites morphology can be observed in all PTT/ZnO nanocomposite samples. However, at higher loading of ZnO nanoparticles, band spacing became larger and was finally disturbed. Copyright © 2016 John Wiley & Sons, Ltd.
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