Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xiaoyu Zhao,Wenyu Zhao,Zhiwen Chen,Chuquan Liu,Yujun Zhou,Zhigao Zhu,Yue Yang,Junwen Qi,Jiansheng Li
The treatment of volatile organic compounds emitted from the paint and coatings industry is a challenge. In this study, porous carbon spheres (PCSs) with a diameter of about 1 mm were successfully prepared via the phase inversion followed by charring with nano-ZnO as the template to adsorb VOCs. Nano-ZnO prepared in situ was adapted to tailor the structure and chemical properties of PCSs, and commercial nano-ZnO was used for comparison. The resultant PCSs possessed a high surface area and favorable hierarchical porous structure. Adsorption of benzene and ethyl acetate from the paint and coatings industry can be used to evaluate the adsorption properties of PCSs. Due to the doping of different amount of in-situ nano-ZnO, the specific surface area increased and the pore size decreased, which accelerated the mass transfer and had a good adsorption effect. In particular, the adsorption capacity of PCSs-2 to benzene reached 459.6 mg/g. At the same time, due to the abundance of oxygen-containing functional groups on the PCSs surface, hydrogen bonds could be formed with polar molecules, thus achieving a good adsorption effect on polar VOCs. The simultaneous adsorption mechanism of benzene and ethyl acetate was also defined. These results suggested that PCS would be ideal for the removal of VOCs from the paint and coatings industry.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Peng Shi,Hongju Chen,Shenwen Fang,Rui Liu,Ming Duan
Hydraulic oil is essential for machine operation, but water contamination can impair its functionality and lead to mechanical damage. Traditional dehydration methods, such as evaporation, are energy-intensive and may degrade the oil's quality. While filtration has been used to reduce water content in light oils, its application to highly viscous hydraulic oil remains unexplored. This study introduces a novel filter fabricated using ZnO, TiO₂, and stearic acid (STA)-modified mesh via a hydrothermal approach. The filter demonstrated the ability to reduce the water content in 46# hydraulic oil from 25,000 mg/L to below 162 mg/L, irrespective of the presence of surfactants. Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy, X-ray Photoelectron Spectroscopy (XPS), and performance evaluations suggest that esterification between stearic acid and oxygen groups on the TiO₂ surface is the key mechanism driving the filter's dehydration efficiency. This work represents a significant advancement in the deep dehydration of viscous oils through filtration, offering a low-energy and effective solution for enhancing hydraulic oil performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Weili Ye,Jin Li
Formaldehyde vapor (CH 2 O) is a well-known hazardous gas. Long-term exposure to high concentrations of CH 2 O can cause chronic respiratory diseases in humans and increase the risk of cancers such as leukemia and nasopharyngeal cancer. Zeolite imidazolic frame-67 (ZIF-67) has a high specific surface area and porosity; therefore, it can be used to prepare gas-sensitive materials. In this study, rod-flower-like ZnO was obtained by activation of the rod ZnO using 2-methylimidazole. The ZIF-67-coated rod-flower-like ZnO was then used to synthesize ZnO@ZIF-67 (ZZ67). Experimental and theoretical analyses showed that the ZIF-67 on the ZZ67 surface provided abundant active sites for pure ZnO, which helped to capture target gas molecules more quickly in the experimental atmosphere and realize susceptible detection. Moreover, ZZ67 had a high response (1210) to 500 ppm of CH 2 O at room temperature (~25 ℃), which was 4.8 times the response of activated ZnO (251). Furthermore, owing to the high hydrophobicity of ZIF-67, ZZ67 was mainly unaffected by humidity. Overall, ZZ67 exhibited good selectivity, a high response to CH 2 O, and low sensitivity to high relative humidity.
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JOURNAL OF INORGANIC BIOCHEMISTRY
·
2022
·
IF 4.336
Qiong Liu,YingKai Wu,Ju Li,Ertao Liu,Fan Tian,Huiping Zhao,Rong Chen
Ag-decorated ZnO nanorods with different Ag contents were prepared by deposition-precipitation method, which demonstrated enhanced inhibition ability for the common pathogen, especially exhibited excellent antibacterial effects on clinical drug resistant bacteria. Moreover, Ag-decorated ZnO nanorods presented much lower cytotoxicity to HEK293 cell than that of silver nanoparticles (AgNPs). The electron spin resonance (ESR) spectra revealed that oxygen vacancies (V O ) were formed in ZnO after the decoration of AgNPs . To understand the improved antibacterial activity of Ag-decorated ZnO nanorods, reactive oxygen species (ROS) were determined. It was found that more H 2 O 2 were generated over Ag-decorated ZnO compared to pure ZnO, which was closely related to the oxygen vacancy (V O ) concentration. The production of large amount of H 2 O 2 resulted in more serious membrane leakage of cytosol and dehydrogenation inactivation of respiratory chain for bacterial, thus leading to the enhanced antibacterial activities of Ag-decorated ZnO nanorods.
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JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Chen Li,Guoqing Feng,Zonglin Pan,Menghan Sun,Xinfei Fan,Chengwen Song,Tonghua Wang
Treatment of antibiotics wastewater by electrocatalytic functional membrane has drawn much attention in recent years. One of the key factors that affects the membrane performance is the electrochemical activity of the electrocatalyst , which is crucial related to its morphology. Herein, a series of well-defined ZnO with different morphologies ranging from nanorods (NRs), nanoflowers (NFs) and nanoplates (NPs) were synthesized directionally with the induction of morphology-dependent functional ions by a facile electrodeposition method, thereby realizing the controllable preparation of morphological different ZnO/CMs. The intrinsic relationship between the morphology of electrocatalysts and their electrochemical properties was revealed and results indicated that ZnO NRs/CM exhibited the highest removal efficiency for the treatment of Amoxicillin synthetic wastewater. It was attributed to the largest surface of facet (0001) of NRs exposure, which strengthen the electrochemical property of ZnO NRs/CM with the fastest electron transfer rate and the highest rate of hydroxyl radical generation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
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IF 4.939
Changlin Li,Yanfang Wang,Shangrong Chen,Wei Zhang,Zi Wang,Zhongyu Hou
The erosion issue of ZnO nanorod arrays (NRAs) film is the major obstacle in surface sensitization of ZnO NRAs grown on Zn foil substrate for photoelectrochemical (PEC) applications. In this paper, PEC performance of ZnO NRAs grown on Zn foil substrate was greatly enhanced by coating ZnSe and CdSe on the surface of ZnO NRAs. Dense ZnO NRAs were in - situ grown on seed-free Zn foil substrate in a NH 3 ·H 2 O and NaOH hydrothermal system. ZnSe/CdSe co-sensitized ZnO heterostructures were then successfully synthesized using ZnO NRAs as precursors by two successive in - situ ion exchanges without damaging Zn foil and ZnO NRAs film. To obtain optimal photoconversion efficiency, anion exchange time and temperature were optimized. ZnO/ZnSe/CdSe heterostructures with optimized structure were shown as a layer of compact ZnSe/CdSe nanofilm conformally and uniformly coated on ZnO NRAs, which leads to efficient separation of photogenerated carriers , significant enhancement in visible-light absorption, and excellent PEC performance with photocurrent density of 3.008 mA/cm 2 (−0.2 V vs . Ag/AgCl) and photoconversion efficiency of 1.99% (0.418 V vs . RHE in polysulfide electrolyte solution), 27.55 and 40.61 times higher than those of ZnO NRAs, respectively.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Rong-Rong Su,Yu-Xiang Yu,Yong-Hao Xiao,XianFeng Yang,Wei-De Zhang
CuSbS 2 is regarded as a promising photo-absorber for solar energy conversion due to its proper bandgap, high absorptivity and earth abundance. Herein, novel low-cost ZnO/CdS/CuSbS 2 core-shell nanowire arrays were constructed as photoanode for hydrogen evolution through non-aqueous electrodeposition and cation exchange. The nanowire demonstrates even and compact multilayer structure. The optimal ZnO/CdS/CuSbS 2 photoanode achieves a photocurrent of 6.48 mA/cm 2 at 0 V versus Ag/AgCl and the remarkable IPCE value with approximately 52% at 480 nm in an electrolyte solution containing 0.35 mol/L Na 2 SO 3 and 0.25 mol/L Na 2 S. It also exhibited a good stability, maintained 87.9% of the initial current after 1 h measurement. The high performance benefits from well-crystalline and compact multilayer structure, high absorptivity of CuSbS 2 and CdS, p-n junction formed between CdS and CuSbS 2 which promotes the electron-hole separation and ZnO nanowire array as three dimensional scaffolds for electron percolation pathway. This work suggests the potential applications of low-cost p-n junction core-shell nanowire arrays as a highly efficient photoanode for hydrogen evolution in oil-field waste water with reductive sulfide.
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CERAMICS INTERNATIONAL
·
2021
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IF 4.527
Yan Wang,Liangliang Liu,Weixing Zhao,Rong Ma,Jiaojiao Pang,Dengwei Hu,Zhen Dou,Meng Song,Tong Li,Kangkang Miao
Ferroelectric BaTiO 3 /ZnO heterojunction catalysts synthesised via the sol–gel method present obvious enhancements in spontaneous polarisation-driven Fenton-like catalytic activity. In this study, the oxidative decomposition of methylene blue (MB) dye was used as a model reaction. Pure BaTiO 3 -activated potassium monopersulphate (PMS) could decompose up to 48% of MB dye in an aqueous solution after 40 min. MB degradation rate firstly increased and then decreased as the ZnO content of the ferroelectric BaTiO 3 /ZnO heterojunction materials was increased. The maximum degradation rate of 100% and good cycling stability were observed when the BaTiO 3 :ZnO molar ratio was 1:1. Three active species, namely, holes (h + ), sulphate radicals (SO 4 •− ) and hydroxyl radicals (OH • ), were produced following the spontaneous polarisation-driven catalytic degradation of the dye. Amongst these species, h + and SO 4 •− were the main active species. Enhancements in the Fenton-like catalytic activity of BaTiO 3 /ZnO may be attributed to the formation of semiconductor heterojunctions, which could improve the spontaneous polarisation strength of ferroelectric BaTiO 3 , promote the effective separation of e − –h + pairs and accelerate PMS activation. In summary, a novel PMS activation method was developed to provide a nontoxic, efficient and environmentally friendly technology for the degradation of organic pollutants.
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NANOTECHNOLOGY
·
2023
·Vol. 34
·期 39
·395502
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IF 3.5
Fengna Shi,Jingfang Li,Cheng Chen,Fang Wang,Naipin Chen,Ziqi Xu,Jiajun Wang
Monitoring glucose, uric acid (UA) and hydrogen peroxide (H2O2) concentration has emerged as a critical health care issue to prevent acute complications and to minimize the hazard of long-term complications. In this paper, a novel non-enzyme electrochemical sensor was proposed with nanorod-like zinc oxide anchored on carbon nanotubes using a direct precipitation method and then decorated onto carbon cloth (ZnO/CNTs/CC). The ZnO/CNTs composite was characterized by x-ray photoelectron spectroscopy (XPS), Raman spectrum, TEM microscope and electrochemistry. The sensing of UA, glucose and H2O2 individually or simultaneously was done on a ZnO/CNTs/CC electrode, and the superior performance lies in its wide linear range, low detection limit and high selectivity, which is attributed to the synergistic effect of (a) the good electrocatalytic activity of ZnO nanorods, and (b) the large surface area with high conductivity offered by CNTs. Moreover, the ZnO/CNTs/CC electrode showed good reproducibility, stability and selectivity. Importantly, the developed sensor platform has been successfully applied to probe glucose, UA and H2O2 in human serum with satisfactory recoveries. Our proposed approach is simple in fabrication and operation, which provides a straightforward assay for the reliable and cost-effective determination of glucose, UA and H2O2 in clinical diagnosis and biomedical applications.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 12
·4700-4709
·
IF 3.665
Rongzhen Wang,Yan Chen,Yanyan Liu,Mingliang Ma,Zhouyu Tong,Xilei Chen,Yuxin Bi,Weibo Huang,Zijian Liao,Shuailiang Chen,Xinyi Zhang,Qianqian Li
Transition metal as flame retardant has attracted intense interests in recent years. In this work, ZnO@MOF@PZS was prepared via hydrothermal and polycondensation methods. ZnO nanoflowers played the role as a template for growth of MOF@PZS and zinc source for formation of MOF. Subsequently, the obtained ZnO@MOF@PZS was mixed into polyurea (PUA) to investigate its flame retardancy and toxicity suppression properties. The cone calorimeter test (CCT) showed that ZnO@MOF@PZS significantly improved the flame retardancy of PUA composites. The addition of 3 wt% ZnO@MOF@PZS into PUA could result in peak heat release rate (PHRR), total heat release (THR) and total CO production (TCO) of 28.30%, 19.59% and 36.65%, respectively. The result of universal testing machine showed that ZnO@MOF@PZS-add PUA had better mechanical properties. It is notable that the improved flame retardant properties for PUA composites are mainly attributed to ZnO@MOF@PZS promoting the formation of dense char residue.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Huayao Chen,Hongkai Deng,Ximing Zhong,Hongjun Zhou,Jinghui Zhan,Xinhua Zhou
Nano zinc oxides (ZnO) had aroused enthusiastic attention in bacteriostasis. However, the antibacterial efficiency of the nano ZnO was greatly reduced due to agglomeration during the practical application. Herein, an effective approach to the uniform dispersion of ZnO on montmorillonite (Mt) intercalated by porous silica was reported to improve the antibacterial efficiency. A petal-like silica-clay composite (SC) loaded with ZnO (SC/ZnO) was synthesized, the appropriate ratio of Mt and TEOS to completely exfoliated the Mt sheets was explored, which was 0.88 g Mt and 2 mL TEOS . Benefiting from the microporous silica microspheres , the composites possessed a large specific surface area about 239 m 2 /g and well-dispersed ZnO, with a similar zinc content of Mt-ZnO about 10%. Comparatively, SC/ZnO composites showed enhanced antibacterial activity against Staphylococcus aureus with respect to Mt-ZnO. The results indicated that silica modification provided a promising strategy to improve the bacteriostatic efficiency of "metal oxide-clay" composites.
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BIOCHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 3.226
Yu-Xia Song,Li-Yuan Chai,Chong-Jian Tang,Ruiyang Xiao,Bing-Rong Li,Di Wu,Xiao-Bo Min
The spread application of nanoparticles (NPs) would cause instability on anaerobic ammonium oxidation (anammox) process. The present study focused on the short-term evaluation of ZnO nanoparticles (NPs) on anammox process by batch tests. Results indicated that a significant inhibition occurred under ZnO NPs stress of 5–100 mg gVSS −1 . The half inhibitory concentration (IC 50 ) of ZnO NPs was found to be 11.6 mg gVSS −1 . The release of zinc ions from ZnO NPs dissolution was confirmed to be the main mechanism of inhibition on anammox activity. Haldane kinetic model simulation results confirmed that ZnO NPs imposed a non-competitive inhibition on nitrite conversion by decreasing maximum nitrogen removal rate ( q max ), while they showed a competitive inhibition on ammonium conversion kinetics with affinity constant ( K s ) increasing by 6 times. From the competitive inhibition results, it is suggested that the inhibition caused by ZnO NPs could be alleviated and recovered under higher ammonium concentrations.
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危险品化学品经营许可证（带存储）