Journal of Cleaner Production
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2026
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IF 10.7
Lihong Wang,Jialu Liu,Heyao Zhang,Fan Zhang,Yongze Liu,Tao Zhang
As reverse osmosis (RO) is widely applied in wastewater reclamation, developing green and efficient technologies for persistent high-risk organic contaminants in RO concentrate (ROC) is crucial for aquatic ecosystem safety and water supply security. Solar-driven ZnO catalytic oxidation was demonstrated to form highly reactive hydroxyl radical (HO • ), selective superoxide radical (O 2 •- ), and valence band holes (h vb + ) for depollution. Among six typical organic contaminants frequently detected in ROC, obvious degradation was observed for sulfamethoxazole (SMX), atrazine (ATZ), imidacloprid (IMD), and methylisothiazolinone (MIT), but the removal of halogenated iopamidol (IPA) and sodium diatrizoate (DTZ) was retarded during solar/ZnO treatment. Compared with traditional TiO 2 photocatalyst, abundant reactive species were readily generated on the ZnO surface and gradually diffused into surrounding solution. The degradation rates of target contaminants exhibited a positive correlation with ZnO dosage, and were affected by solution pH in multiple aspects. Specifically, strong acidic conditions were detrimental to ZnO material stability, while alkaline environments hindered sufficient particle dispersion in water. Common inorganic anions (e.g., HCO 3 − and NO 2 − ) and humic acid usually suppressed the solar/ZnO photocatalytic oxidation of above organic contaminants to varying degrees through competing for reactive species and/or adsorption sites. The sequential solar/ZnO oxidation-ZVAl reduction process was effective for actual ROC during chemical oxygen demand, total nitrogen, total phosphorus loadings and persistent high-risk organic contaminants burdens control. Transformation pathways of six typical contaminants were proposed and acute/chronic ecotoxicity variation were evaluated. This work offers a feasible technology and application guidance for ROC treatment, though appropriate dilution may still be required before discharge.
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JOURNAL OF SOLID STATE CHEMISTRY
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2019
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IF 2.291
Lulu Huang,Jun Guo,Zhen-Hua Ge,Yehua Jiang,Jing Feng
The In 2 O 3 (ZnO) 3 + x mol%Ga 2 O 3 ( x = 0, 0.1, 0.3, 0.5, 1) ceramics were synthesized by a solid-state reaction process. The effect of Ga doping on the thermoelectric properties of the In 2 O 3 (ZnO) 3 ceramics was studied. The phase structure and microstructure of all the bulk samples were checked by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), respectively. Additionally, the minimum thermal conductivity of 1.45 Wm −1 K −1 at 973 K is obtained for 0.5% Ga-doped sample, which is 35% lower than that of the pristine sample. The significantly decreased thermal conductivity for Ga 2 O 3 -doped sample is due to the enhanced scattering of phonons , which is derives from the point defects caused by Ga-doping and the introduction of the second phase. As a result, the In 2 O 3 (ZnO) 3 +0.5 mol% Ga 2 O 3 sample achieved the highest ZT value of 0.23 at 973 K.
研究领域:
材料科学
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热电学
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陶瓷
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固态化学
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RSC Advances
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2014
·Vol. 4
·期 65
·34531-34538
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IF 3.708
Fei Wang,Yiqing Chen,Chao Liu,Qilin Ma,Tian Zhao,Min Wang
Electron transport and recombination kinetics in dye-sensitized solar cells (DSSCs) based on an urchin-like Zn/ZnO heterostructure are characterized by the intensity modulated photocurrent/photovoltage spectroscopy (IMPS/IMVS), and a dynamic IMVS model correlating to the unique urchin-like configuration is developed for the first time. Intriguingly, the photoanodes with different micromorphology and microstructure generated by tuning the annealing time, show significant discrepancies in electron transport, recombination and charge collection. The photoelectrochemical study reveals that the electron transport properties are closely related with ZnO/electrolyte/dye interface and the metal/metal oxide Schottky junction nanostructure.
研究领域:
材料科学
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光伏技术
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纳米技术
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电化学
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可再生能源
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Journal of Materials Chemistry A
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2023
·Vol. 11
·期 7
·3454-3463
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IF 11.9
Lei Ding,Jinyan Zhao,Zhikang Bao,Shijie Zhang,Huaijie Shi,Jia Liu,Guoliang Wang,Xiaoge Peng,Xing Zhong,Jianguo Wang
H2O2 and O3 production through electrochemical synthesis is a promising approach to replace anthraquinone processes and corona discharge. However, the simultaneous generation of H2O2 and O3 and the use of their synergistic oxidation to degrade organic contaminants remains a challenge. Herein, heterojunction bifunctional ZnO/ZnS@C electrocatalysts were prepared by a one-step pyrolysis method. ZnO/ZnS@C-750 can achieve 90% selectivity for H2O2 and 11% Faraday efficiency for gaseous O3. The primary contributor to such a performance was exploited to accelerate the electron transfer on the heterogeneous interface and generate more reaction sites. H2O2 and O3 can also be simultaneously generated in the electrolyzer and the synergistic effect of H2O2 and O3 can be utilized to completely degrade organic pollutants, such as phenol and tetracycline. This work provided new insights into the design of the 2e− ORR (oxygen reduction reaction) and EOP (electrochemical ozone production) bifunctional electrocatalysts for pollutant degradation.
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CATALYSIS LETTERS
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2023
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IF 2.8
Fang Yu,Chen Fengtao,Qin Xianan,Zhang Bingying,Mei Xueting,Lu Wangyang,Li Nan
As one of extensively used photocatalysts, zinc oxide nanoparticles (ZnO NPs) can generate free radicals under proper light irradiation, thereby achieving excellent antibacterial performance. However, the requirement of using light activation has limited its application to wider fields. In addition, nano-copper (Cu NPs) have gradually attracted the attention of researchers due to their excellent antibacterial properties. However, the high surface activity of nanoparticles makes them easy to agglomerate, and Cu NPs are easily oxidized, which affect the antibacterial activity. By synthesizing Cu–ZnO composite nanoparticles and loading the particles onto low melting-point polyethylene terephthalate (LMPET) fibers, we have developed a novel catalytic fiber (Cu–ZnO@LMPET) that can generate active species without needing light. It was found that Cu–ZnO@LMPET fibers with the copper content of 5 wt% (vs. ZnO NPs) or above could achieve 99% antibacterial effects on S. aureus and E. coli under dark conditions. Moreover, the antibacterial rates against E. coli and S. aureus could still be larger than 97 and 98%, respectively, even if the fibers were washed 50 times. In-vitro biocompatibility assessment also displayed that the as-prepared fibers had superb cytocompatibility. These results indicate that our developed fibers have highly efficient antibacterial properties, good washing resistance and high stability. Thus, our work has shed new light on the use of Cu–ZnO NPs for antibacterial purposes.
Graphical Abstract
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Arabian Journal of Chemistry
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2022
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IF 6.212
Linzhan Bai,Xinyan Wang,Xichao Sun,Jiao Li,Lilan Huang,Haibin Sun,Xueli Gao
Development of electrospun nanofiber membranes with the selective wettability characteristics for effectively separating oil–water mixtures is an extremely advisable strategy. In this study, a superhydrophobic electrospinning carbon nanofiber (F/ZnO/CNF) membrane was successfully prepared by electrospinning and in-situ growth of ZnO, and subsequent fluorination reaction with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (POTS). Benefiting from the influence of needle-like nanostructure and low surface energy, the as-prepared F/ZnO/CNF membrane shows excellent superhydrophobicity. When the growth duration of ZnO is 3 h, the obtained F/ZnO/CNF-3 membrane possesses outstanding water contact angle (WCA, 159.7°) and splendid oil–water separation efficiency (>99 %). Meanwhile, due to its the superior environmental stability the obtained F/ZnO/CNF-3 membrane exhibits excellent low and high temperature resistance, and enhanced resistance to various organic solvents in the face of a series of harsh environments.
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JOURNAL OF NANOBIOTECHNOLOGY
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2023
·Vol. 21
·期 1
·1-11
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IF 10.2
Wu Zhihua,Zhao De,Han Xin,Liu Jichang,Sun Ying,Li Yaogang,Duan Yourong
Background Superhydrophobic substrate modifications are an effective way to improve SERS sensitivity by concentrating analyte molecules into a small surface area. However, it is difficult to manipulate low-volume liquid droplets on superhydrophobic substrates. Results To overcome this limitation, we deposited a hydrophilic Ti 3 C 2 T x film on a superhydrophobic ZnO nanorod array to create a SERS substrate with improved analyte affinity. Combined with its interfacial charge transfer properties, this enabled a rhodamine 6G detection limit of 10 −11 M to be achieved. In addition, the new SERS substrate showed potential for detection of biological macromolecules, such as microRNA. Conclusion Combined with its facile preparation, the SERS activity of ZnO/Ti 3 C 2 T x suggests it may provide an ultrasensitive environmental pollutant-monitoring and effective substrate for biological analyte detection. Graphical Abstract
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PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2022
·Vol. 106
·期 1
·158-172
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IF 2.606
Luo Qiuzi,Sun Yihua,Guo Jin,Zhang Jiangyu,Fang Liang
In this study, the effect of Ti doping ratio on Ti/Ga co-doped ZnO (TGZ) nanopowders was investigated. TGZ nanoparticles with different Ti loadings were prepared using the sol-gel method and analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), infrared spectroscopy (FT-IR), ultraviolet-visible spectrophotometer (UV-Vis), X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL). The results show that when the Ti doping content is low (0.25at%–1at%), all TGZ samples are single-phase and have the same wurtzite structure as pure ZnO, and when the Ti doping content is high (1.5at%–6at%), a second phase appears, which is the Zn 2 TiO 4 inverse spinel phase. When the doping is low, Ti and Ga can replace the position of Zn, the particle size of ZnO is reduced, the absorption of visible light is enhanced, and the catalytic degradation ability is improved. When the powder is highly doped, the shape distortion of the powder is obvious, and the crystal changes from single-phase to multi-phase, but the absorption of visible light is enhanced, and the recombination of electron-hole pairs is reduced. Through the MB degradation experiment, it was found that T 1.5 G 1.5 Z had the strongest degradation ability, and the degradation rate reached 96% in 150 min. With the further doping of Ti, the degradation rate remained at a high level.
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SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Lianyun Cheng,Yanwei Li,Guang Sun,Jianliang Cao,Yan Wang
With the growing concern on environment protection, fast and selective detection of various harmful gases with the sensors based on metal oxide semiconductor (MOS) has stimulated increasing interest. However, the unsatisfied gas sensing performance of pure MOS hinders its practical application. In this paper, we propose a Bi 2 O 3 -ZnO heterojunction strategy to upgrade the performance of ZnO sensor to realize ultrafast detection of triethylamine (TEA) with high sensitivity and selectivity. To expound it, nanoscale Bi 2 O 3 -ZnO p-n heterojunctions were uniformly modified on the ZnO porous nanosheets-assembled architecture (PNSA) via an impregnation, freeze-drying and calcination method by using self-made Zn 5 (CO 3 ) 2 (OH) 6 as precursor. The obtained Bi 2 O 3 /ZnO PNSAs are about 7 µm in size, in which the thickness of porous nanosheets is around 25–38 nm. Impressively, compared with the sensor based on pure ZnO PNSA, the Bi 2 O 3 /ZnO PNSA sensor exhibited remarkably boosted triethylamine (TEA) sensitive performances, especially of faster response speed (<1 s for 100 ppm TEA), better selectivity (S TEA/toluene = 406.013) and higher sensitivity (26.886/ppm for 1–100 ppm TEA). The sensitization mechanisms of Bi 2 O 3 -ZnO heterojunction on ZnO PNSAs was discussed in detail.
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Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Sisi Xiao,Zhou Shen,Shilin Song,Song Han,Yansheng Du,Huijuan Wang
Catalysis of the ZnO/cellulose acetate (CA) films in a multi-electrode paralleling dielectric barrier discharge (DBD) system for sulfadiazine (SDZ) degradation was investigated in this study. The catalysis was induced by the multiple physical and chemical effects produced during the DBD process. The obtained results on the reactive species formation revealed that the more O 3 , •OH as well as 1 O 2 could be formed by the addition of the ZnO/CA films into the DBD plasma system. The optimal additive conditions of the catalyst were 4 pieces of 3% the ZnO/CA films addition. There was a better catalytic effect of the ZnO/CA films than the equal amount of the nano ZnO powder addition. The ZnO/CA films still took on the catalytic activity after four cycles usage in the DBD plasma system. The possible degradation pathways were also speculated by analyzing the inorganic and organic intermediates formed during the SDZ degradation.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Jie Liu,Linye Ji,Junyi Yu,Shanjun Ding,Suibin Luo,Baojin Chu,Jianbin Xu,Rong Sun,Shuhui Yu
We demonstrate that introduction of heterostructure nanoparticles into a polymer matrix is an effective strategy to substantially enhance dielectric breakdown strength (E b ) and thus a high electrostatic energy storage density (U e ) can be obtained, which is highly desired in modern electronic and electrical systems for energy storage and conversion. This is realized through the special “electrical rectification” effect of heterostructure nanoparticles on the charge transport, which stems from capturing and confining charge carriers in the nanocomposites by potential well and potential barrier formed at the heterojunction of ZnO-ZnS nanoparticles. The leakage current of the ZnO-ZnS/polyetherimide nanocomposites (ZnO-ZnS/PEI) is suppressed by the introduced heterojunction, which is accompanied with the simultaneous increase of dielectric displacement and charge–discharge efficiency, resulting in significant enhancement of U e . Notably, the 1 wt% ZnO-ZnS/PEI nanocomposite films possess high discharged energy density at room temperature, i.e. 6.9 J cm −3 at 650 MV m −1 , and even at 150 °C, the U e still remains 3.6 J cm −3 at 500 MV m −1 . Outstanding fatigue resistance over 50,000 charge–discharge cycles at 200 MV m −1 and 150 °C demonstrates high temperature cyclic stability of the heterostructure in confining charge carriers. This work provides a novel and scalable strategy to obtain polymer-based dielectrics with superior energy storage performance.
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APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Jingjing Wang,Jinyang Feng,Chuanfu Wei
In the present study, molecularly imprinted polyaniline was immobilized on Fe 3 O 4 /ZnO composite by surface imprinting technique. The obtained molecularly imprinted photocatalyst was used for selective degradation of amoxycillin under visible light irradiation. The presence of Fe 3 O 4 not only endowed the photocatalyst with magnetic separation feature but also enhanced visible light harvesting ability. Compared with Fe 3 O 4 /ZnO composite, photocatalytic performance of the molecularly imprinted photocatalyst was significantly improved because polyaniline could form a heterojunction with ZnO to enhance photocatalytic performance. The molecularly imprinted photocatalyst displayed better photocatalytic efficiency and selective photodegradation activity towards amoxycillin than the non-imprinted photocatalyst, because the photodegradation reaction could take place not only on surface of the photocatalyst but also in imprinted cavities for the molecularly imprinted photocatalyst, while the photodegradation only occurred on surface of the non-imprinted photocatalyst. Active species capture experiments showed that .O 2 - and h + played a crucial role in the degradation of amoxycillin. The current research provided new insight for fabrication of molecularly imprinted photocatalyst with selective degradation ability for organic pollutants.
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