JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
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2018
·
IF 3.647
Wanchun Yang,Qin Sun,Qing Lei,Wenbo Zhu,Yufeng Li,Jun Wei,Mingyu Li
A new Pb-free Ag paste containing a Bi 2 O 3 -B 2 O 3 -ZnO glass frit was developed for Al 2 O 3 substrate metallization . First, Bi 2 O 3 -B 2 O 3 -ZnO glass frits with various compositions and glass transition temperatures (T g ) of 322 °C–440 °C were synthesized by using a traditional melt-quenching method. Then, silver pastes containing different contents of the glass frit were sintered on an Al 2 O 3 substrate at temperatures ranging from 450 °C to 600 °C. The glass frit content and the sintering temperature had significant impacts on the electrical resistivity and shear strength of the product. The experimental results indicated that the silver film formed from the paste containing 7 wt.% glass frit and sintered at 600 °C for 15 min had a low electrical resistivity of 2.5 μΩ cm and a high strength of 28.5 MPa. These properties resulted from the formation of a stable glass network that supported the Ag network. Furthermore, ZnAl 2 O 4 was observed to form close to the interface of the Al 2 O 3 substrate, which could improve the shear strength . Moreover, the Bi-based glass frit could be a suitable substitute for Pb-based glass frits in the preparation of environmentally friendly silver pastes for forming thick Ag films on Al 2 O 3 substrates.
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OPTICS AND LASER TECHNOLOGY
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2025
·
IF 5
Lingjun Zhou,Panyi Wang,Tenglong Sun,Yanan Chen,Muzhi Cai,Wenyan Zheng,Feifei Huang,Ying Tian,Liaolin Zhang,Junjie Zhang
Tellurite glasses with the composition 67TeO 2 -3Al 2 O 3 -xZnO-(30-x)Na 2 O (x = 0–20 mol%) were synthesized via melt-quenching. Raman analysis revealed Al/Zn synergistically strengthened the network via Al-O-Te/Zn-O-Te bonds below 15 mol% ZnO, whereas excess ZnO triggered Zn 2+ /Al 3+ site competition, reducing crystallization resistance. The glass with 15 mol% ZnO (TANZ) shows optimal thermal stability ( T g = 311 °C, ΔT = 139 °C) and serves as the host for obtaining mid-infrared emission. The Ho 3+ /Yb 3+ co-doped TANZ glass shows high absorption and emission cross-sections of 7.36 × 10 –21 cm 2 and 5.86 × 10 –21 cm 2 , respectively, along with a long lifetime of 1.33 ms at 2 μm. These results highlight the potential of TANZ glasses as robust gain materials for mid-infrared fiber lasers.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Kaihui Hua,Zhijing Wu,Weijie Chen,Yu Zheng,Xiuan Xi
Despite extensive research on TiO 2 -based photocatalysts, their poor visible-light response and low charge-separation efficiency still limit practical applications in wastewater treatment. While previous studies have explored individual strategies such as metal doping or defect engineering, few have systematically investigated their synergistic effects in TiO 2 porous ceramics. This study addresses these challenges by developing a dual-modification strategy combining ZnO doping and NaBH 4 reduction to enhance the photocatalytic performance of TiO 2 porous ceramics. ZnO doping promotes anatase phase stability and inhibits the anatase-to-rutile transition, while NaBH 4 reduction introduces abundant oxygen vacancies and Ti 3+ species, narrowing the band gap and extending light absorption into the visible range. As a result, the optimized ceramics achieve a methylene blue degradation efficiency of 90.07%, outperforming undoped (79.32%) and singly ZnO-doped (86.01%) counterparts. This synergistic enhancement is attributed to the tailored surface chemistry and electronic structure, verified through structural and optical characterizations. Compared with previous TiO 2 porous ceramic studies, this work provides a scalable and effective modification strategy, offering new insights for designing high-efficiency, recyclable photocatalysts for environmental remediation.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yanlin Zhang,Chaowei Jia,Quan Kong,Nanyu Fan,Gang Chen,Hongtao Guan,Chengjun Dong
The development of acetone gas sensors is desirable but challenging for both air quality monitoring and medical diagnosis. Herein, starting from bimetallic In/Ga metal–organic frameworks (MOFs) (MIL-68 (In/Ga)), a facile strategy is proposed to couple with zinc ions to design In/Ga oxide (IGO)@ZnO core–shell nanotubes for efficient acetone detection. In such a heterostructure, tiny ZnO nanoparticles are closely decorated on IGO nanotubes, which is beneficial to enlarge the specific surface area and create rich oxygen vacancies and heterojunction interfaces. Benefiting from the structural merits and synergetic effects, the IGO@ZnO-based gas sensor exhibits a low detection limitation (200 ppb), a high response, good linearity relationship between the sensing responses and wide testing acetone concentrations, and fast response and recovery time (6.8/6.1 s) with good selectivity and stability. These sensing performances strongly indicate the practical application to quantitatively detect acetone.
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高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2021
·Vol. 2022
·期 4
·e202100944
·
IF 2.524
Yichang Lin,Sheng Liu
Graphical Photocathodic protection is promising to harvest solar light for corrosion protection of metals. Benefiting from a considerably enhanced absorption for visible light and a significantly increased transfer efficiency for photogenerated charges, the as-prepared ZnO/ZnSe/CdSe photoanode exhibits a superior photocathodic protection performance for the coupled 304 stainless steel under illumination. Photocathodic protection technology is emerging to harvest solar light for electrochemical corrosion protection of metals. Herein, ZnO/ZnSe/CdSe heterostructured nanowire arrays were synthesized on conductive glass substrates by a two-step ion-exchange reaction in ZnO nanowire arrays. The as-prepared ZnO/ZnSe/CdSe core/shell nanostructure was unveiled by XRD, SEM, TEM, EDAX elemental mapping, and XPS analyses. The ZnO/ZnSe/CdSe ternary heterojunction photoanode exhibits a considerably enhanced absorption for visible light and a significantly increased separation, transfer, and collection efficiencies for photogenerated charges. When working as photoanodes, the as-deigned ZnO/ZnSe/CdSe heterostructured nanowire arrays demonstrates a superior photocathodic protection performance for the coupled 304 stainless steel under illumination with AM 1.5G.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Fan Gao,Jie Yuan,Xueyan Huang,Rui Lei,Cankun Jiang,Jiandong Zhuang,Ping Liu
The construction of heterojunction is an effective strategy to manipulate the dynamic behaviors of photo-induced charges. It is essential for wide band gap semiconductor to introduce defects reasonably to mediate electronic properties and charge behaviors. Herein, through an in situ etching growing method and thermal treatment, dual defective ternary photocatalyst ZnS/ZnO-In 2 O 3 with porous layered structure and extensive heterojunction interfaces has been prepared for visible light photocatalysis of water splitting. The suitable position of intermediate energy level endows the ternary photocatalyst with the ability of electrons directed flow between the different components, and the transfer mode follows Z-scheme. The cascaded dual defects on ZnO and ZnS synergistically facilitate the efficient separation of photo-generated charges through the intimate interface, and further enhance visible light photocatalysis performance. This work is expected to enlighten the rational design of dual defects for wide bandgap semiconductor.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Feng Xie,Jian-Feng Guo,Hai-Tao Wang,Na Chang
As a typical semiconductor, ZnO is considered as a favorable photocatalyst due to its excellent photoelectrochemical properties. However, low response of visible light and the recombination of photoinduced carriers limits its application in photocatalysis . Herein, a novel, robust and recyclable heterogeneous photocatalyst based on flower-like Co doped ZnO microspheres was presented without changing the hierarchical morphology. The crystal structure, light absorption , and electrochemical performance were systematically investigated, and the response of Co doped ZnO to visible light significantly enhanced with the gap band reduced from 3.20 eV to 2.54 eV. Due to the transformation of Co 2+ to Co 3+ , more oxygen vacancies were produced, with more photoinduced electrons transferring to Co 3+ which would greatly inhibit the recombination of photoinduced electrons and holes and improve photocatalytic activity. 2-Mercaptobenzothiazole (MBT) which is considered as a long half-life intermediate of antibiotic medicine is chosen as a target. As a result, the 7% Co-ZnO photocatalyst exhibited excellent photocatalytic activity for the degradation of MBT with the rate constant of 0.1498 min −1 and removing ratio of 97.3% in 50 min. The formation of excess oxygen vacancies and the conversion between Co 2+ to Co 3+ were further identified by XPS analysis . This work provides new sights for doping transition metal with different chemical valence in semiconductors for producing oxygen vacancy and improving the photocatalytic efficiency.
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MACROMOLECULAR BIOSCIENCE
·
2018
·Vol. 18
·期 7
·1800028
·
IF 3.392
Yi Deng,Lei Yang,Xiaobing Huang,Junhong Chen,Xiuyuan Shi,Weizhong Yang,Min Hong,Yuan Wang,Matthew S. Dargusch,Zhi-Gang Chen
Polyetheretherketone is attractive for dental and orthopedic applications due to its mechanical attributes close to that of human bone; however, the lack of antibacterial capability and bioactivity of polyetheretherketone has substantially impeded its clinical applications. Here, a dual therapy implant coating is developed on the 3D micro-/nanoporous sulfonated polyetheretherketone via layer-by-layer self-assembly of Ag ions and Zn ions. Material characterization studies have indicated that nanoparticles consisting of elemental Ag and ZnO are uniformly incorporated on the porous sulfonated polyetheretherketone surface. The antibacterial assays demonstrate that Ag-decorated sulfonated polyetheretherketone and Ag/ZnO-codecorated sulfonated polyetheretherketone effectively inhibit the reproduction of Gram-negative and Gram-positive bacteria. Owing to the coordination of micro-/nanoscale topological cues and Zn induction, the Ag/ZnO-codecorated sulfonated polyetheretherketone substrates are found to enhance biocompatibility (cell viability, spreading, and proliferation), and hasten osteodifferentiation and -maturation (alkaline phosphate activity (ALP) production, and osteogenesis-related genetic expression), compared with the Ag-decorated sulfonated polyetheretherketone and the ZnO-decorated sulfonated polyetheretherketone counterparts. The dual therapy Ag/ZnO-codecorated sulfonated polyetheretherketone has an appealing bacteriostatic performance and osteogenic differentiation potential, showing great potential for dental and orthopedic implants.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Wen-Li Xin,Lian-Hua Xu,Kun-Kun Lu,Dan Shan
Fe-N catalysts are one of the promising candidates with efficient oxygen reduction reaction (ORR) activities comparable to Pt-based catalysts. Therefore, in this work, a novel Fe-N based electrocatalyst with high activity, porous structure, and durability were prepared. Highly active N,N′-carbonyldiimidazole (CDI) was used to form zinc-based zeolitic imidazole frameworks involved with zinc carbonate (Zn-ZIFs@ZnCO 3 ). Fe-doping can be feasibly achieved by partial substitution Zn by Fe using Fe (NO) 3 . Owing to the presence of ZnCO 3 and Fe 3+ , carbonization of Fe/Zn-ZIFs@ZnCO 3 at 925 °C under N 2 atmosphere endows the pyrolysis products with many highly active heterostructures of 3D graphene structure. The obtained Fe-N@ZnO possesses superior ORR performance to commercial 20% Pt/C catalysts, such as positive half-wave potential (0.851 V), good durability and methanol tolerance in 0.1 M KOH.
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MICROCHIMICA ACTA
·
2025
·Vol. 193
·期 1
·44
·
IF 5.3
Fan Yafeng,Jiao Baoping,Yu Zhongping,Zong Bingbing,Li Haiyan,Wu Xianzhen
A new kind of electrochemical biosensor was fabricated by modifying a glassy carbon electrode (GCE) with Ni-doped ZnO nanorods suspension for the sensitive and selective detection of miRNA-21. The electrode surface was coated with polydopamine (PDA), crosslinked with glutaraldehyde, and functionalized with DNA probes. Bovine serum albumin (BSA) was then used to block non-specific binding sites. Electrochemical analyses were adopted to systematically investigate the progress of the stepwise electrode modification and the hybridization. The electrochemical characterization indicated a gradual decrease in current response and an increase in charge-transfer resistance after each modification step, verifying the successful assembly of the sensing interface. Following optimization, the biosensor could detect concentrations as low as 21.30 fM with a dynamic linear range of 10 − 6 nM to 10 5 nM, good reproducibility, and selectivity to the mismatch and non-complementary sequences. Crucially, recovery experiments in spiked human serum samples gave satisfactory results, confirming the clinical potential of the system. In general, the Ni-doped ZnO nanorod-based biosensor provides sensitive, label-free, and low-cost detection of circulating miRNAs. Its modularity allows for simple conversion for detection of other nucleic acid-based biomarkers, implicating it as a useful diagnostic tool for early cancer diagnosis and point-of-care screening. Graphical abstract
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Jingyuan Guo,Letu Siqin,Yufei Li,Wenbo Li,Ruijian Liu,Hongmei Luan,Chengjun Zhu
The band alignment of Cu 2 ZnSn(S,Se) 4 (CZTSSe)/CdS(In) in novel CZTSSe solar cells without a ZnO window layer has been initially investigated in our previous studies. However, the In content of CdS(In) diffused into the absorber is low, and the ability to regulate the band arrangement is limited. In this work, we employ In-ion-doped absorbers to adjust defects. However, this approach leads to a significant loss in short-circuit current density (Jsc). To address this, Cd is introduced to enhance Jsc through grain growth promotion and morphological improvement, thereby offsetting the Jsc loss induced by In doping. The co-doping of In and Cd reduces the conduction band offset (CBO) from 0.28 eV to 0.21 eV, thereby inhibiting carrier recombination and enhancing transport efficiency. Additionally, the concentration of bulk defects is reduced by an order of magnitude. As a result, the fill factor (FF) increased from 56.97 % to 60.08 %, Jsc increased from 37.10 mA/cm 2 to 38.66 mA/cm 2 , and open-circuit voltage (Voc) increased from 431.64 mV to 440.48 mV. Finally, the power conversion efficiency (PCE) of CZTSSe solar cell is enhanced to 10.23 %.
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Reaction Kinetics Mechanisms and Catalysis
·
2022
·Vol. 135
·期 4
·2231-2246
·
IF 1.843
Luo Qiuzi,Sun Yihua,Guo Jin,Zhang Jiangyu,Fang Liang
The properties of ZnO nanoparticles doped with titanium ions (Ti 4+ ) and gallium ions (Ga 3+ ) were modified by sol–gel method. Considering the ion radius of doped metal elements, the radius of Zn ions and the doping limit of ZnO, the doping rate of Ti is fixed at 1 atom%, and the optimal doping amount of Ga is discussed. The Ga/Ti co-doped ZnO nanoparticles were characterized by X-ray diffraction (XRD), ultraviolet/visible spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and infrared spectroscopy. XRD results show that Ga/Ti co-doped ZnO has hexagonal wurtzite phase structure. With the increase of Ga doping concentration, the particle size of ZnO decreases. Through photoluminescence analysis, it is found that the absorption of Ga/Ti co-doped ZnO in the visible region moves to the long wave direction. In addition, with the increase of Ga doping, the particle size of GTZ powder first decreases and then increases, the band gap also decreases and then increases. When the doping amount of Ga is 1.5 atom%, the photocatalytic activity is the best. The degradation rate of MB was 90% within 2.5 h. Ga/Ti co-doped ZnO nanoparticles have good photocatalytic properties and low cost. They are a promising catalyst for wastewater treatment.
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