ACS Applied Engineering Materials
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2025
·
IF 3.5
Rui He,KangLi Yang,CanCheng Li,XuYu Long,Qian Su,ZhiQing Yuan,ShouTong Meng,ShiMing Fu,ZeXin Dai
Ship discharges and offshore crude oil spills pose significant challenges to human health and environmental safety. Superhydrophobic coatings exhibit excellent water-repellent properties and can be widely applied in fields such as oily wastewater treatment and oil spill remediation. In this study, a superhydrophobic nonwoven fabric (SNWF) was fabricated using polydimethylsiloxane (PDMS), nanosilicon dioxide (Nano-SiO2), and nanozinc oxide (Nano-ZnO). The water contact angle (WCA) of the SNWF reaches 155°. Furthermore, the SNWF demonstrates an excellent separation performance for various oil–water mixtures, with a separation efficiency of 95%. Even after 200 cycles of mechanical manual kneading and rubbing as well as exposure to varying pH conditions and temperatures, the SNWF retains its superhydrophobicity and exhibits excellent abrasion resistance and weatherability. Additionally, the incorporation of Nano-ZnO into the coating significantly enhances the antimicrobial properties of the SNWF. The SNWF fabricated in this study features stability, low cost, and ease of large-scale production, thus showing considerable potential for practical applications.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Han Lijuan,Chai Keyi,Du Xinyu,Wang Xiangtong,Zhang Ping,Wang Xiaotian
Tetracycline poses a serious threat to the ecosystems even if the concentration is very low due to its structural stability. In this work, a series of magnetic separable Fe 3 O 4 /ZnO/g-C 3 N 4 composite with excellent degrading tetracycline performance were prepared. And, repeated calcination method was used to strengthen the bonding effect of single component improving the formation of heterojunction. Electrochemical analysis confirmed that the ZnO/g-C 3 N 4 and Fe 3 O 4 /ZnO/g-C 3 N 4 heterojunctions were generated, effectively accelerating the electron separation and transfer in photocatalytic process. The characterization results also showed that ZnO and Fe 3 O 4 nanoparticles are evenly distributed on the surface of g-C 3 N 4 . With the increase of the loading mass concentration of ZnO/g-C 3 N 4 , the degradation rate of tetracycline on Fe 3 O 4 /ZnO/g-C 3 N 4 composite increased and then decreased. The degradation rate of tetracycline on optimal Fe 3 O 4 /ZnO/g-C 3 N 4 composite reached to 94.50% while the TC mineralization rate reached to 61.61% under visible light irradiation for 120 min, exhibiting excellent photocatalytic performance. Due to the effect of Fe 3 O 4 , Fe 3 O 4 /ZnO/g-C 3 N 4 materials exhibited good magnetic property, which is beneficial to separation and recovery of photocatalysts. The reusability experiment showed that the degradation rate of tetracycline was 80.66% after five cycles, displaying good reusability.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2015
·Vol. 17
·期 40
·26690-26702
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IF 4.493
Shengjie Xia,Mengmeng Shao,Xiaobo Zhou,Guoxiang Pan,Zheming Ni
A series of novel organic–inorganic nanoscale layered materials were synthesized by intercalating the Ti-containing Schiff base complex into the interlayer of the ZnM layered double hydroxides (LDHs, M = Al, Cr, Fe, Ce). The hybrid material was further calcined to make metal oxide composites with highly dispersed Ti elements (Ti/ZnO–MxOy). The structural characterization and photocatalytic results showed that, after intercalation and calcination, the metal oxide composites with a unique flower-like crystal morphology not only had high specific surface area, uniform pore size distribution and narrow band gap, but also showed extremely high photocatalytic performance for hexachlorobenzene (HCB) degradation. The Ti/ZnO–Cr2O3 composite with the narrowest band gap (2.40 eV) and the highest surface area (227 m2) showed the highest photocatalytic performance for HCB (95.5% within 240 min) among the four metal oxide composites. Particularly, it was found that composites derived from layered materials with different supramolecular structure of the host and guest showed different photocatalytic properties. In addition, based on the results from ESR, GC-MS and HPLC-MS, the type and amount of hydroxyl radicals, the decomposition intermediates and the pathway of HCB degradation photocatalyzed by Ti/ZnO–MxOy composites are also discussed in detail.
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Nanoscale
·
2016
·Vol. 8
·期 36
·16349-16356
·
IF 7.76
Fengdong Qu,Huifang Jiang,Minghui Yang
The rational design of nanoscale metal oxides with hollow structures and tunable porosity has stimulated tremendous attention due to their vital importance for practical applications. Here, we report the designed synthesis of ZnO/ZnCo2O4 hollow core–shell nanocages (HCSNCs) through a metal–organic framework (MOF) route. The strategy includes the synthesis of a zeolite imidazolate framework-8 (ZIF-8)/Co–Zn hydroxide core–shell nanostructure precursor and subsequent transformation to ZnO/ZnCo2O4 HCSNCs by thermal annealing of the as-prepared precursor in air. Various techniques were employed for characterization of the structure and morphology of the as-prepared ZnO/ZnCo2O4 HCSNCs. When applied as a gas sensing material, the ZnO/ZnCo2O4 HCSNCs show enhanced sensitivity to xylene when compared with ZnCo2O4 shells as well as ZnO nanocages (NCs). In addition, excellent reversibility and superior selectivity of the sensor were observed. The remarkable enhancement in the gas-sensing properties of the ZnO/ZnCo2O4 HCSNCs is attributed to their unique structure and a synergistic effect of ZnO and ZnCo2O4.
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Journal of Physical Chemistry C
·
2023
·
IF 3.7
Li Yang,Tianwen Xu,Zhongchen Bai,Shuijie Qin
The ZnO/CsPbBr3 heterojunction interface often has poor chemical stability, resulting in the low photovoltaic efficiency of the solar cell. Here, we reported a method to fabricate an electron transport layer (ETL) using an Al element-doped ZnO (AZO) sol to improve the interfacial defects of the ZnO/CsPbBr3 heterojunction. The results showed that the interfacial defects first decreased and then increased with the change of the Al element ratio from 0 to 10%. The device had the least interfacial defects by 7% (atomic ratio) Al doping into ZnO. A 1.27 V open-circuit voltage (VOC) and 6.25% photoelectric conversion efficiency (PCE) were achieved by 7% Al element doping into ZnO in a ZnO/CsPbBr3/carbon structure solar cell. Moreover, the interfacial defect distribution and carrier recombination mechanism of the device were, respectively, illustrated by a varying light intensity test and electrochemical impedance spectroscopy. This work showed that an Al-doped ZnO film prepared by a sol–gel method could significantly improve the performance of solar cells.
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Nanoscale
·
2018
·Vol. 10
·期 9
·4500-4514
·
IF 7.233
Xin Liang,Lei Shen
In2O3(ZnO)k natural superlattices (where k is an integer), consisting of relatively earth abundant and non-toxic elements with coarsening-resistant nanostructures, are environmentally friendly materials with the potential for high temperature thermoelectric applications. Herein, we report our investigation of the high temperature thermoelectric properties of the In2O3(ZnO)4 superlattice bulk polycrystals that were singly and dually doped with Al and Ce. Transport property measurements revealed that Al and Ce did not only enter the ZnO blocks but also modified the InO2 single atomic layers. The effective electron potential barrier height of the superlattice interfaces can be adjusted by doping, and the optimal value that maximizes the power factor is of the order of kBT above the Fermi level. The interfacial thermal (Kapitza) resistance of the InO2 atomic sheets dramatically increased with doping, primarily accounting for the bulk thermal conductivity reduction. At the optimal crossing of the interfacial thermal resistance and the effective potential barrier height, a maximum ZT of ≈0.22 was achieved at 800 °C in the 1.6 mol% Al-doped superlattice, which was an enhancement of ∼200% over the pristine In2O3(ZnO)4. This work provides a new perspective on enhancing the high temperature thermoelectric performance of nanostructured oxides by synergistically optimizing the interfacial phonon and electron transport properties.
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Journal of Energy Chemistry
·
2020
·
IF 7.216
Ruihan Zhang,Maochun Wu,Xinzhuang Fan,Haoran Jiang,Tianshou Zhao
Currently, lithium-sulfur (Li-S) batteries still suffer from fast capacity decay, poor coulombic efficiency (CE) and short cycling lifespan, which result from the severe shuttle effect issue caused by high solubility and rapid diffusion of lithium polysulfides (LiPSs) in organic electrolytes. Here, yolk-shell zinc oxide (YS-ZnO) spheres are synthesized and for the first time, applied as a host for Li-S batteries to tackle this challenge. The polar ZnO exhibits high chemical anchoring ability toward LiPSs while the unique yolk-shell structure not only provides an additional physical barrier to LiPSs but also enables much more uniform sulfur distribution, thus significantly suppressing LiPSs shuttling effect meanwhile promoting sulfur conversion reactions. As a result, the YS-ZnO enables the Li-S battery to display an initial specific capacity of 1355 mAh g −1 and an outstanding capacity retention capability (~89.44% retention rate) even after 500 cycles with the average CE of ~99.46% at the current of 0.5 C. By contrast, the capacity of conventional-ZnO-nanoparticles based battery severely decays to 472 mAh g −1 after cycling for 500 times. More impressively, the S/YS-ZnO based Li-S battery can maintain a low decay rate of 0.040% every cycle and high average CE of 98.82% over 1000 cycles at 3 C.
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ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Xiong Yin,Zhongzhong Xu,Yanjun Guo,Peng Xu,Meng He
Perovskite solar cells, which utilize organometal–halide perovskites as light-harvesting materials, have attracted great attention due to their high power conversion efficiency (PCE) and potentially low cost in fabrication. A compact layer of TiO2 or ZnO is generally applied as electron-transport layer (ETL) in a typical perovskite solar cell. In this study, we explored ternary oxides in the TiO2–ZnO system to find new materials for the ETL. Compact layers of titanium zinc oxides were readily prepared on the conducting substrate via spray pyrolysis method. The optical band gap, valence band maximum and conduction band minimum of the ternary oxides varied significantly with the ratio of Ti to Zn, surprisingly, in a nonmonotonic way. When a zinc-rich ternary oxide was applied as ETL for the device, a PCE of 15.10% was achieved, comparable to that of the device using conventional TiO2 ETL. Interestingly, the perovskite layer deposited on the zinc-rich ternary oxide is stable, in sharp contrast with that fabricated on a ZnO layer, which will turn into PbI2 readily when heated. These results indicate that potentially new materials with better performance can be found for ETL of perovskite solar cells in ternary oxides, which deserve more exploration.
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ACS Sensors
·
2026
·Vol. 11
·期 8
·7629-7639
·
IF 10.9
He Jianwang,Zhang Rongkai,Wei Yuyu,Ji Mingwei,Meng Hu,Xu Yan
Nitrous oxide (N 2 O) is a potent greenhouse gas, but its chemical inertness hinders sensitive chemiresistive sensing. We demonstrate here that Au-decorated ZnO (Au-ZnO) dramatically enhances N 2 O detection. At an operating temperature of 260 ° C, the Au-ZnO sensor responds to 25 ppm N 2 O with a value of 7.6, which is a 3.8-fold enhancement over the ZnO sensor. It also exhibits high selectivity against common greenhouse gases, a lower theoretical limit of detection (0.24 ppm), a fast response time (10 s), and reliable stability. The previously elusive mechanism has been uncovered by integrating experimental characterizations and density functional theory calculations. A strong metal–support interaction, abundant oxygen vacancies at the Au-ZnO interface, and an electron-rich surface collectively switch N 2 O adsorption geometry from the O-end (physisorption on ZnO) to the N-end (weak chemisorption on Au-ZnO). This switch induces significant intramolecular charge rearrangement of N 2 O, which is crucial for enhancing the selective N 2 O sensing reaction. The abundance of reactive sites, the spillover effect, and the catalytic action of Au nanoparticles, as well as the narrowed band gap, promote N 2 O adsorption, surface reactions, and rapid charge transfer collectively. This work goes beyond the traditional oxygen-ionosorption model by showing that switching adsorption geometry and intramolecular polarization are crucial for activating inert molecules. This provides a detailed explanation of how to create high-performance N 2 O sensors.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 15
·1145
·
IF 3.2
Mao Tan,Wang Wei,Liu Peilong,Zha Junyan,Bu Xiran,Song Rui,Luo Xueke
To overcome the intrinsic limitations of TiO 2 , specifically its wide band gap and rapid photogenerated carrier recombination, for dyeing wastewater treatment, a Yb 3+ /Er 3+ co-doped TiO 2 -ZnO heterostructure was fabricated by sol–gel method. X-ray diffraction revealed inhibited anatase-to-rutile phase transition. X-ray photoelectron spectroscopy confirmed Ti 2p binding energy shifts, indicating strong electronic interactions between dopants and the host lattice. Ultraviolet–visible diffuse reflectance spectroscopy showed band gap narrowing to 2.927 eV, with upconversion effect extending light absorption to the near-infrared region. Photoluminescence measurements demonstrated suppressed carrier recombination, and XPS confirmed abundant oxygen vacancies. The optimal sample achieved 74.31% methylene blue degradation under visible light for 6 h and 98.58% under ultraviolet light for 2 h, outperforming commercial P25. The Yb 3+ /Er 3+ co-dopants serve dual functions: they act as upconversion centers to harvest low-energy photons and function as electronic modulators that induce Ti 2p binding energy shifts and create oxygen vacancies, thereby enhancing charge separation and surface reactivity. This work integrates rare-earth co-doping with heterojunction engineering to boost TiO 2 photocatalysis.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Danhong Gao,Shang Li,Xianjie Xu,Hongwei Liu,Hanling Deng,Qianyao Lu,Dusong Hou,Sheng Huang,Mingzhi Jiao,Xiaowei Li,Xinjian He
Rapid and reliable detection of methane (CH 4 ), a key clean energy source and potent greenhouse gas, is of great importance for industrial safety and environmental protection. In this work, a high-performance CH 4 gas sensor is developed based on hollow ZnO nanobowls decorated with Pd nanoparticles, synthesized via a template-assisted strategy followed by mild impregnation. The hollow nanobowl architecture features a uniform particle size (~350 nm), ordered mesopores (~3.4 nm), and a high specific surface area of 104.06 m 2 g −1 , which effectively enhances gas diffusion and surface reaction kinetics without relying on complex heterojunctions or bimetallic systems. The introduction of Pd increases the oxygen vacancy content from 29.41% to 41.48%, provides additional active sites, and facilitates electron transport. Moreover, Pd catalyzes O 2 dissociation via a spillover effect and lowers the activation energy for C H bond cleavage in CH 4 , while the work function difference between Pd and ZnO induces a Schottky barrier at the interface, dynamically modulating the sensor conductivity. Benefiting from the synergistic effects of morphological regulation and interfacial electronic modulation, the sensor exhibits a high response of 67% to 1000 ppm CH₄ at an operating temperature of 253.5 °C, along with an ultrafast response/recovery time of 2/10.5 s and a wide detection range of 20–10,000 ppm. In addition, the sensor demonstrates good selectivity and excellent long-term stability, with less than 10% signal fluctuation over 30 days. Building upon the reliable concentration discrimination validated by CNN-1D models, an LSTM-based short-term dynamic prediction framework was further introduced to evaluate temporal early-warning performance under rapid methane concentration variations. The results demonstrate that the proposed sensor–algorithm integration can effectively capture dynamic concentration evolution and accurately predict the 5000 ppm alarm threshold across multiple diffusion rates, highlighting its potential for early-warning applications in confined spaces.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jin Yang,Pengcheng Xue,Lu Zhao,Yajuan Luo,Lianyi Li,Guiying Jiang,Beibei Wang,Shiliang Liu
This study presents an eco-friendly approach for the green synthesis of ZnO nanoparticles (ZnO NPs) using enzymatically hydrolyzed Sargassum fusiforme extracts (SFEE). A comprehensive suite of analytical techniques, including UV-visible absorption spectroscopy, UV-visible diffuse reflectance spectroscopy (UV-Vis DRS), photoluminescence (PL) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS), were employed to systematically characterize the structural, morphological, surface chemical, and optical properties of the synthesized ZnO NPs. UV-visible absorption spectroscopy confirmed the formation of nanoparticles through a distinct absorption peak at 375 nm. FTIR and XPS analyses revealed that functional groups derived from SFEE participate in nanoparticle formation and surface stabilization. XRD, FESEM, and HRTEM results demonstrated that SFEE-ZnO nanoparticles possess a well-defined hexagonal wurtzite structure with uniform dispersion, a reduced average particle size of 75.23 nm, and a smaller crystallite size (21.22 nm) compared with chemically synthesized ZnO (C-ZnO) and ZnO prepared using hot aqueous extracts (SFAE-ZnO). UV-Vis DRS analysis revealed a red shift in the absorption edge of SFEE-ZnO, corresponding to a narrowed bandgap of 3.20 eV, while PL analysis indicated suppressed electron-hole recombination. These synergistic structural and electronic features contribute to enhanced photocatalytic activity. The photocatalytic performance of SFEE-ZnO was evaluated by degrading methylene blue (MB, 15 mg L -1 ) using 1 mg mL -1 of catalyst under both UV and solar irradiation. SFEE-ZnO exhibited superior degradation efficiencies of 97.65% under UV light and 99.48% under solar light within 30 min, significantly outperforming C-ZnO and SFAE-ZnO. These results highlight the potential of SFEE-ZnO as an efficient and environmentally sustainable photocatalyst for solar-driven wastewater remediation.
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