JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 9
·6745-6765
·
IF 2.779
Sathya M.,Shobika P. A.,Ponnar M.,Pushpanathan K.,Elsi S.
This work reports the synthesis and characterization of Sr doped ZnO nanoneedles prepared by the chemical precipitation method. Studying the outcome of Sr doping on crystallite size, microstructure, optical and magnetic properties, synthesized nanoparticles were examined by using an x-ray diffractometer, a vibrating sample magnetometer, an ultraviolet–visible spectrometer, a field emission scanning electron microscope, and a photoluminescence spectrometer. The XRD investigation confirmed the increase in average crystallite size from 16 to 33 nm with the increase in Sr content up to 5% and then decreased to 26.23 for 10% of Sr content. The UV–Vis spectra confirmed the bandgap variation from 3.53 to 3.33 eV with Sr doping. FTIR spectra confirmed the substitution of Sr in ZnO through the slight shift of vibrational bonds at 570 cm −1 towards the higher wavenumber. UV emission at 395 nm observed in PL spectra confirmed the formation of ZnO nanoparticles. A microstructural analysis established the morphology transformation from nanoflakes to nanoneedles at a higher amount of Sr. Magnetization behaviour confirmed the weak ferromagnetism in undoped and Sr doped ZnO nanoparticles. The saturation magnetization, retentivity, and coercive field of 3% Sr doped ZnO are 0.30 emu g −1 , 0.034 emu g −1 , and 0.064 T, correspondingly. The enhancement of coercivity and magnetization is attributable to the replacement of Zn 2+ by Sr ions. A cyclic voltammetry study suggested that Sr doped ZnO nanoflakes may be a promising substantial electrode for supercapacitor development.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Mao Feng,Yanli Sun,Lingxuan Wang,Yalun Wu,Shuangshuang Wang,Liangyu Li,Shiwen Wang,Yanxia Wang,Zumin Wang,Yasong Zhao,Feifei You,Danyang Li
Constructing advanced photocatalysts for tetracycline (TC) degradation in aquatic environments is a promising and green strategy to mitigate antibiotic resistance and ecological risks. In this work, the hollow structured ZnO microspheres functionalized with Pt nanoparticles were rationally designed and synthesized through a sacrificial template approach and photodeposition process. The hollow structures strengthened light trapping via multi-scattering in cavity as well as shortened charge migration pathway due to the thinner shell, which facilitated more electron (e − ) and hole (h + ) migration to catalyst surface. Furthermore, the Pt nanoparticles anchored on ZnO surfaces induced localized surface plasmon resonance (LSPR) effect, broadening light absorption in visible light range. Concurrently, the formation of heterojunction between Pt and ZnO significantly suppressed the recombination of e − /h + . Thus, the optimal Pt/ZnO catalyst achieved 90.29 % TC degradation within 100 min, exhibiting a reaction rate constant of 0.02347 min −1 , which was 2.62-fold higher than that of single ZnO. Moreover, the degradation efficiency retained 87.84 % after five successive recycles, demonstrating exceptional durability and stability. This work offers a facile and scalable strategy for fabricating high performance photocatalysts for organic compounds degradation in pollution water with a bright application prospect.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Guo-Juan Wang,Qiang-Qiang Zhu,Gan-Yu Cai,Yue Zhai,Shuang-Qiang Fang,Juan Kang,Le Wang
The realization of high-quality laser-driven white light remains challenging due to the limited heat dispersion and inconsistent light uniformity of color converters. In this study, ZnO particles with high thermal conductivity and a high index of refraction were induced into phosphor-in-glass (PiG) films to form a Y 3 Al 5 O 12 (YAG):Ce 3+ -ZnO composite structure. The influences of ZnO particles on the luminescence, optical properties, thermal dissipation performance, and light uniformity of PiG films were studied in detail. Benefiting from the improved thermal dissipation, the luminescence saturation threshold of the YAG:Ce 3+ PiG film was improved from 10.97 to 12.96 W/mm 2 , and the luminous flux was improved from 1271 to 1468 lm. The increased light scattering attributed to ZnO particles also effectively dispersed both laser and emitted light. This significantly enhanced the angular consistency of the color rendering index (Ra) and correlated color temperature (CCT). It indicates that the YAG:Ce 3+ -ZnO composite PiG film would be an interesting color converter for producing high-quality laser-driven white light.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xiaoshun Wei,Xuechun Yang,Yun Guo,Yinzhong Liu,Lingchao Wang,Qingjie Wang,Lingli Cheng,Zheng Jiao
In this study, a novel UV-enhanced Mg-doped MOF-ZnO sensor was investigated for its efficient detection of n-butanol gas at lower temperatures. The composite samples were prepared by the co-precipitation method with the appropriate component ratio. The structure, morphology, and optical properties of the as-prepared samples were systematically analyzed through XRD, SEM, TEM, BET, XPS, and UV–vis characterizations. The gas-sensitive performances based on the pristine MOF-ZnO and Mg-doped MOF-ZnO sensor series with the doping levels of 1 %, 3 %, 5 %, and 7 % (wt%) were comprehensively evaluated by adopting the gas-sensitive system. Among them, the 3 % Mg:MOF-ZnO sensor has given prominence to the largest specific surface area and highest oxygen vacancy concentration demonstrating the most excellent gas-sensing performance. Furthermore, with the aid of UV excitation, the 3 % Mg:MOF-ZnO sensor had achieved the enhanced response value of 2049 that was 4.44 times higher than that of pristine MOF-ZnO to 100 of ppm n-butanol at a low temperature of 246 °C, additionally presented out the superior reproducibility with speedy response/recovery time (12/22 s), the theoretical detection limit as low as 200 ppb, as well as the excellent long-term stability and selectivity for n-butanol. This study offers a promising strategy for the well-development of high-performance n-butanol sensors.
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Molecular Catalysis
·
2025
·
IF 4.9
Xiaohong Guo,Liqiang Deng,Xiaoyue Wang,Yongjie Zhao,Zhifan Cao,Pengwei Li,Congming Li
A pivotal aspect in advancing ZrZnO x catalysts for CO 2 hydrogenation lies in the modulation of Zr-O-Zn active sites, with ZnO facets emerging as potential modulators of site activity. Whereas the beneficial influence of non-polar ZnO facets on ZrZnO x catalysts has been scarcely documented. Our investigation reveals that ZrZnO x catalysts exposed non-polar ZnO facets (ZrZnO-n) exhibit superior methanol selectivity (74 %) compared to those with randomly exposed ZnO facets (ZrZnO-r, 35 %). Characterization results demonstrate that it is ascribed to the formation of highly active Zr-O-Zn (2−δ)+ sites on ZrZnO-n, which facilitate H 2 adsorption and dissociation. In situ spectroscopic studies and DFT calculations further substantiate this finding, demonstrating enhanced intermediates formation and more efficient hydrogenation processes. This research underscores the significance of ZnO facet engineering in the purposeful creation of efficient ZrZnO x catalysts for CO 2 hydrogenation.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Xinglin Li,Qian Wang,Shasha Guo,Cheng He,Hengyang Mao,Xiaoshan Meng,Zhengzhong Zhou,Tao Zheng
Animal carcasses can be harmlessly treated through high-temperature and high-pressure hydrolysis, resulting in the production of bioactive polypeptides. The polypeptides can be effectively separated from other impurities by ultrafiltration (UF) membranes technology. However, membrane fouling is inevitable during filtrating process, which significantly impacts their lifespan and economic efficiency. In this study, the photocatalyst ZnO nanoparticles on the PVDF membrane surface (PVDF/Zn) were fabricated to degrade foulant. Firstly, tannic acid (TA) was blended into the membrane to provide coordination sites to fix Zn 2 ⁺. Then, ZnO nanoparticles was synthesized exclusively on the membrane surface under ultrasonic assistance, where the ultrasonic energy generated by the cavitation bubbles was excluded by the pore size. Chemical composition and morphology characterization were conducted to prove the successful synthesis of ZnO on the membrane surface. The PVDF/Zn membrane demonstrated a flux of 42 L m −2 h −1 and a rejection of 97 % when filtering BSA solution, with a flux recovery rate (FRR) of 80 % after photocatalytic degradation. During the treatment of high-temperature and high-pressure hydrolyzed animal carcass solution (HHAS), the FRR exceeded 90 %, effectively separating impurities from polypeptides. This work provides a novel approach to enhancing the efficiency of treating HHAS and offers new insights into the preparation of photocatalytic membranes.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Linxu Xu,Yaxin Li,Feiyong Chen,Xue Shen,Zhigang Yang,Jin Wang,Yufeng Du,Xinmeng Yue,Rupeng Liu,Yubo Zhao
In this paper, we present a simple way to achieve the controllable synthesis of composite ZnO@SiO 2 materials. γ-aminopropyltriethoxysilane (APTES) was chosen as the silicon source, and pre-synthesized zinc bromoacetate (ZnBA) was selected the functional metal precursor. By simply regulating the water–ethanol volume ratio, it was possible to simultaneously regulate the sizes of both the composite material and the metal nanoparticles . With an increase in the hydroalcoholic volume ratio from 1:1–3:1, the sizes of the silica materials were increased from 615 to 3020 nm, while the sizes of the ZnO nanoparticles were increased from 3.75 to 6.25 nm. Three ZnO@SiO 2 materials with blue, green, and yellow fluorescence were obtained. More importantly, the hydroalcoholic volume ratio and the particle size of the material showed a good linear relationship. In addition, a “rapid nucleation–aggregation growth” mechanism was proposed, and the controlled growth of metal oxide nanoparticles was explored.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Chen Wu,Changyan Zhu,Kangkai Liu,Shaowei Yang,Yu Sun,Kai Zhu,Yueling Cao,Sai Zhang,Sifei Zhuo,Min Zhang,Qiuyu Zhang,Hepeng Zhang
The catalytic hydrogen transfer (CHT) cascade reaction between alcohols and nitro- compounds meets green chemistry yet involves high catalyst requirements. Herein, a hierarchical nano-pyramid structure, in which cobalt single atoms (Co SAs) are deposited on highly dispersed ZnO nanoparticles supported by nitrogen-doped carbon (denoted as Co-ZnO/NC), was designed and obtained through pyrolysis of ZnCo-ZIF. The catalyst exhibited excellent catalytic performance toward the CHT cascade reaction, achieving a high nitrobenzene conversion (94 %), imine selectivity (97 %), and turnover frequency (8.8 h −1 ). This nano-pyramid is a state-of-the-art non-noble-metal catalyst and is comparable to noble-metal catalysts. Experimental and DFT results revealed that the Co SAs supported on ZnO reduced the reaction energy barrier of hydroxyl dehydrogenation, the first and rate-determining step in this heterogeneous catalysis. Furthermore, Co-ZnO/NC exhibits good recyclability and universality. Our findings offer a new catalyst for Schiff base synthesis and aid understanding of the roles of Zn in ZIF-derived carbon catalysts.
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OPTICAL MATERIALS
·
2025
·
IF 4.2
Yanfen Wang,Pengfei Jia,Jie Ai,Gangzheng Liu,Shuangshuang Liu,Juan Gao,Zhaoqi Sun
Novel Ag/ZnO composite nanoflowers (CNFs) had been designed as a surface-enhanced Raman scattering (SERS) substrate for organic molecule detection. Flower-like ZnO architecture was firstly synthesized by a low-temperature precipitation method, and subsequently Ag nanoparticles were decorated on ZnO nanoflowers through a photochemical reaction. The optimal Ag component was investigated by changing the photo-reduction time of Ag + in the ZnO precursor solution. It is found that the Ag nanoparticles with suitable size and crystallinity are significantly related to the light absorption and Raman signals for Ag/ZnO substrate. For Rhodamine 6G (R6G) as probe molecules, the optimal Ag/ZnO-40 min CNFs achieve a low detection limit of 1.0 × 10 −12 M and a high enhanced factor (EF) of 1.74 × 10 6 . Due to its excellent photocatalytic activity, the Ag/ZnO active substrate effectively degrades R6G molecules adsorbed on the surface, displaying an excellent self-cleaning property and stable recyclability. Such a superior SERS performance can be attributed to the synergy effect of two components (Ag nanoparticles and ZnO nanoflowers) such as its unique architecture, charge transfer and high-density hot spots.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2025
·
IF 4.9
Jinyan Tang,Jingtian Tong,Hao He,Tianjian Xu,Jinzheng Yang,Dan Huang,Zhaoyong Chen,Junfei Duan
Aqueous zinc-nickel batteries suffer from severe anode challenges including dendrite growth, self-corrosion, and hydrogen precipitation, which drastically limit their cycle life and performance. Herein, a novel chemical foaming strategy was proposed to scalably fabricate ZnO@Bi 2 O 3 heterostructures. ZnO nanocrystals (∼30–80 nm) intimately integrate with Bi 2 O 3 via chemically bonded heterointerfaces were prepared combined with thermal decomposition of zinc nitrate hexahydrate and the physical confinement of polyvinylpyrrolidone. Depth-profiling XPS analysis confirms that Bi 2 O 3 not only forms a permeable barrier against alkaline electrolyte penetration but also induces interfacial charge redistribution via Bi–O–Zn covalent bonding, which regulates Zn(OH) 4 2− migration pathways and suppresses dendrite formation and electrode corrosion. The optimized ZnO@Bi 2 O 3 -M electrode delivers a coulombic efficiency of over 80 % after 600 cycles at 25 mA cm −2 , accompanied by a specific capacity of 481.8 mAh g −1 , and maintains 167.7 mAh g −1 even at 60 mA cm −2 . This study proposes a novel design strategy for high-performance aqueous zinc-nickel battery anode materials via interfacial engineering, coupled with a scalable synthesis route paving the way for industrial implementation.
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JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 10
·1-10
·
IF 2.8
Du Chenglong,Huang Zhibo,Wu Xiaohui,Jing Shuailin,Wang Feifei,Liu Xiao,Shi Yan,Zhang Liqun
The increasing demand for brominated butyl rubber (BIIR) has intensified the use of conventional ZnO/sulfur-based curing systems, raising significant environmental concerns. Herein, we present a sustainable, ZnO- and sulfur-free cross-linking strategy enabled by a primary amine, octadecylamine (ODA), which serves as an efficient cross-linker for BIIR. Upon thermal activation at 160 °C, ODA reacts with the benzylic bromide groups of BIIR via dual nucleophilic substitution, forming stable covalent networks. The cross-link density and resultant mechanical properties exhibit a positive correlation with ODA loading, reaching an optimum at 3 phr. In contrast, octadecyltrimethylammonium bromide (OTAB) and diethylamine hydrochloride—lacking N–H protons—show negligible reactivity, highlighting the essential role of the primary amine functionality in the cross-linking mechanism. This work establishes a quantitative structure–efficiency relationship for amine-based cross-linkers, providing both experimental validation and mechanistic insight for the rational design of environmentally benign vulcanization processes in halogenated elastomers.
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Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-16
·
IF 31.6
Wang Wenxiao,Wang Yaqi,Yin Feifei,Niu Hongsen,Shin Young-Kee,Li Yang,Kim Eun-Seong,Kim Nam-Young
An optoelectronic memristor with bioinspired neuromorphic behavior was proposed based on Ag/TiO 2 Nanowires: ZnO QDs/FTO.
The proposed device establishes superior long/short-term synaptic plasticity in response to electrical and light stimuli, and a neuromorphic computing task is effectively implemented based on its optoelectronic performance.
The device emulated complex biological associative learning behaviors, including the four features of acquisition, extinction, restoration, and generalization.
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