AICHE JOURNAL
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2026
·
IF 4
Jie Li,Ying Liao,Ming Guo,Yue Pan,Yaqian Li,Xuechao Yang,Yulin Wang,Meiyu Zhang,Mengnan Ma,Xiaobo Chen,Yibin Liu,Hao Yan,Chaohe Yang
Direct dehydrogenation of alcohols to aldehydes is a pivotal transformation in fine chemical synthesis. However, conventional thermal processes often suffer from low efficiency and high energy consumption. Herein, we propose an emerging and sustainable strategy that employs CO 2 -assisted in situ hydrogen extraction to drive the dehydrogenation of alcohols under mild conditions. Specifically, CO 2 as a soft oxidant adsorbs and activates on the Cu–ZnO–Al 2 O 3 composite oxide catalyst surface, generating reactive species (COO*) that selectively abstract hydrogen from the α -C of the alcohol. Combined Langmuir-Hinshelwood kinetic analysis and density functional theory calculations reveal a higher formation rate of the aldehyde product and the lower activation barrier for the key C–H bond activation process under the CO 2 atmosphere. As a result, the CO 2 -assisted dehydrogenation markedly enhances reaction efficiency, achieving a 60.21% conversion of 2-ethylhexanal under a low temperature (240°C), which is nearly twice that observed under the pure N 2 atmosphere. This CO 2 -assisted dehydrogenation strategy in this work exhibits a cooperative catalytic pathway that not only enables efficient aldehyde production but also utilizes CO 2 as a chemical resource.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Jiawei Lu,Liyuan Chai,Xiaobo Min,Yunyan Wang,Hui Xu,Yun Li,Yong Ke,Cong Peng
The dissolution mechanism of ZnO in multicomponent oxide melts is pivotal for the co-smelting of primary ores with Zn-bearing secondary resources, as well as for the production and processing of ZnO-containing glasses and ceramics. This study integrated kinetic modeling, in situ interfacial reaction experiments, and melt structure evolution analysis to elucidate the dissolution mechanism of ZnO and assess the impacts of B and Cu on this mechanism. The apparent dissolution rate of ZnO is governed by the interplay of interfacial reactions, precipitation of Zn-bearing solids, and melt-structure evolution. B 2 O 3 expands the liquid phase field and significantly reduces the melting temperature (∼30 °C per 1 wt %). Initially, a Pb/B-rich melt pathway forms and thins the product layer from ∼154 to ∼25 μm. B 2 O 3 depolymerizes the melt, inhibits spinel growth, and accelerates dissolution. In contrast, Cu 2 O generates a dense Cu-rich layer that initially hinders dissolution. As this barrier diminishes, melt depolymerization and spinel growth suppression further accelerate dissolution. Over time, spinel precipitation results in a slight reduction in Zn content in the melt. This study also highlights the amphoteric role of ZnO. With increasing Zn content in the melt, ZnO can switch between acting as a network modifier or acting as a network former. This study lays a theoretical foundation for bath smelting of complex high-zinc feeds and provides a new methodological framework for probing melting mechanisms in multicomponent oxide melts.
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Nanoscale
·
2015
·Vol. 7
·期 20
·9194-9203
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IF 7.394
Ting Hu,Lie Chen,Kai Yuan,Yiwang Chen
Two types of novel fullerene derivative/ZnO hybrids were prepared by physically blending amphiphilic fullerene-end-capped poly(ethylene glycol) (C60-PEG) with ZnO nanocrystals (ZnO/C60-PEG) and by in situ grown ZnO from C60-PEG (ZnO@C60-PEG) at relatively low temperatures. The C60-PEG could act as n-doping on the ZnO while the PEG side chain of C60-PEG could passivate the defects of the ZnO at the same time, consequently increasing the lowest unoccupied molecular orbital (LUMO) level. Compared with the ZnO/C60-PEG by the physical blend approach, the ZnO@C60-PEG by the growth approach showed a more favorable morphology and higher electron mobility by developing a homogeneous network. As a consequence, the efficiency of the inverted polymer solar cells based on thieno[3,4-b]-thiophene/benzodithiophene (PTB7):[6,6]-phenyl C71-butyric acid methyl ester (PC71BM) is raised to 8.0% for the ZnO@C60-PEG cathode buffer layer and to 7.5% for the ZnO/C60-PEG cathode buffer layer with improved long-term stability.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
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
·
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 Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121282
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IF 7.2
Zijian Zhang,Bonan Liu,Li Yang,Jingwen Wang,Yuqing Dong,Chao Tang,Ping Wang,Haijiao Xie,Lei Zhang,Lu Zhang,Jun Zhao,Yu Fan,Wangjing Ma
Polystyrene (PS) waste recycling remains a critical challenge due to its high energy consumption and limited monomer yield. Herein, the b-ZnO catalyst with a few in-situ formed Zn sites at 270 °C under microwaves enhances the depolymerization of PS waste into monomers. To further improve the PS depolymerization over the b-ZnO catalyst, a series of Zn/b-ZnO catalysts with different metal Zn contents were prepared. Among these catalysts, the optimal 5Zn/b-ZnO achieves nearly 100 wt% PS conversion, yielding up to 0.997 g −1 PS liquid products with 0.8 g −1 PS styrene monomer in five cycles of experiment under microwaves. Such process greatly reduces the energy cost as compared with the conventional thermal process (0.51 vs. 0.81 kWh) and the obtained styrene monomer mixture can be repolymerized into fresh PS to complete a closed-loop recovery (80 wt% PS waste recycled). This work builds a novel microwave-assisted Zn/b-ZnO catalyst system for depolymerizing PS waste into monomers in a highly efficient way, which sheds a light on the sustainable recovery of PS waste.
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Journal of Materials Chemistry A
·
2026
·
IF 9.5
Yinxia Dong,LiBo Tong,Xiangjun Li,Miaomiao Li,Wenting Liu,Rongtao Wu,Xinyu Wang,Shiwei Xu,Kuai-She Wang
Corrosion degradation has a significant impact on metallic materials' service life, posing critical environmental, safety and related challenges. Inspired by the energydriven self-healing mechanism of photosynthesis, silane-modified cellulose nanofibers (KMC) and polydopamine (PDA)-functionalized peony-like ZnO (PFZ) are integrated into a vitrimer matrix (PFD) to construct a composite coating on Q235 carbon steel, which is capable of spontaneous healing without artificial intervention.As a photothermal conversion trigger agent, PFZ can autonomously regulate its selfhealing performance according to the energy storage status of coating, toggling between "conservative" and "activated" modes to exhibit dual-mode self-healing behavior. This intelligent adjustment mechanism realizes the efficient utilization of solar energy and fully demonstrates superior environmental adaptability and selfhealing ability (crack narrowing within 10 s). In addition, PFZ also exhibits a unique "multilayered trapping effect" that effectively traps corrosive medium, permanently impeding their further diffusion behaviors. The enhanced barrier protection grants the coating an ultra-low current density (7.655×10 -10 A/cm 2 ) and corrosion rate (8.899×10 -6 mm/y), which are four and three orders of magnitude lower than those of Q235, respectively, representing excellent anti-corrosion performance. This bioinspired approach offers a promising strategy for developing advanced coatings with sustainable and efficient corrosion protection.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Sufaid Shah,Muhammad Sajid,Mobashar Hassan,Zeeshan Muhammad,Xiaojin Zhao,Shahid Hussain,Matin Ashurov,Osama Gohar,Xiaofang Pan
We report a precisely controlled two-step hydrothermal synthesis of stannic oxide (SnO 2 ) nanoparticle-decorated zinc oxide (ZnO) nanorods and a comprehensive study combining experimental analysis with Density Functional Theory (DFT) calculations to explain the improvement mechanism of NO 2 sensing. The optimized ZnO/SnO 2 sensor shows a significantly enhanced response of 249.9 s to 5 ppm NO 2 at 150 °C, a temperature particularly lower than that of many conventional metal oxide sensors, with fast response/recovery times (77/80 s) and outstanding selectivity. Importantly, the sensor demonstrates dynamic performance in humid environments and exceptional long-term stability. DFT calculations disclose that the heterojunction formation enables stronger NO 2 adsorption ( E ads = −1.0 eV) and greater charge transform which is confirmed by density of states analysis. This study provides not only a high-performance sensor candidate for real-world NO 2 detection but also a profound mechanistic insight through the synergy of experimental besides theoretical approaches.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2026
·
IF 5.4
Qinzheng Wei,Sze-Mun Lam,Jin-Chung Sin,Huanming Liu,Jinpeng Su,Kun Dong,Haixiang Li
Multifunctional catalyst surfaces for organic photodegradation and antibacterial applications are generally in high requirements, but they are facing towering challenges in light harnessing capability and charge transfer. In this work, a plate-like Bi 2 MoO 6 loaded onto prism-like ZnO (BZ) composite was devised via a two-step precipitation-solvothermal technique to surmount above lapses. Comprehensive material characterization using XRD, FESEM, TEM, XPS, FTIR, UV–vis DRS, PL and photoelectrochemical measurements witnessed successful material compounding and crucial structural as well as distinct electrochemical traits. When fed with enrofloxacin (ENR) as a targeted aquaculture pollutant, the BZ composite exhibited high photodegradation activity (98.2%) under solar light, which was 1.4 and 2.6 times those of individual Bi 2 MoO 6 and ZnO after 180 min solar irradiation, respectively. Moreover, the BZ composite efficiently realized photocatalytic inactivation of Escherichia coli and Staphylococcus aureus under solar light irradiation. The bacterial colony completely inactivated after introducing the binary composite within 180 min. The remarkable enhancement was due to both incorporation of abundant site Bi 2 MoO 6 and the formation of BZ Z -scheme system which better improved light capturing behaviour and afforded the effective charge segregation for the incremented reactive oxygen species yield (e.g. superoxide anion radical and photogenerated hole). Additionally, LC-MS and T.E.S.T outcomes further validated the efficient ENR photodegradation and a substantial reduction in the toxicity of intermediate products. The relatively convenient repeatability trait and eminent photoactivity performance of BZ were favorable for actual wastewater treatment and bacterial disinfection applications.
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Catalysis Science & Technology
·
2026
·
IF 4.2
Yujie Guo,Chengjie Li,Wenhui Zhang,Ruifang Liu,Xueli Du,Zhen Liu,Ying Zhang,Zi-Feng Yan
Atmospheric CO 2 concentrations are increasing rapidly, posing severe environmental challenges. Hydrogenation of CO 2 to methanol represents a promising strategy to reduce the content of CO 2 . While Cu-based catalysts have garnered significant attention, there are still problems such as low selectivity for methanol and poor stability. In this study, a highly dispersed Cu/ZnO-ZrO 2 catalyst was synthesized via a formamide-assisted co-precipitation method. Investigation of the ZrO 2 loading revealed that the Cu/ZnO-25%ZrO 2 catalyst exhibited optimal performance for CO 2 hydrogenation to methanol, achieving a CO 2 conversion of 6.7%, methanol selectivity of 85%, and a methanol space-time yield (STY) of 586.5 g MeOH •kg cat -1 •h -1 . The results demonstrate a strong interaction between Cu and the ZnO-25%ZrO 2 support surface, which predominantly stabilizes Cu in the Cu + state. Notably, these Cu + species remain stable even after reduction and reaction. This interaction not only ensures high catalytic activity but also confers excellent stability to the catalyst, as evidenced by the absence of deactivation over a 200-hour stability test.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Luan Fu,Lulu Du,Zheng Lu,Weizhong Tan,Xiaohui Shi,Li Lv,Pinhua Zhang,Guangliang Cui
The fabrication of micro/nano metal oxide semiconductor (MOS) heterostructures, employing bimetallic metal–organic frameworks (Bi-MOFs) as self-sacrificing templates, can significantly enhance the sensitivity of the resulting nanocomposite materials. Herein, ZnO/NiO heterostructures derived from Ni/Zn Bi-MOFs were fabricated, which achieved outstanding UV-assisted NO 2 -sensing performance at room temperature. Our experiments reveal a sensitive dependence of the sensing performance of ZnO/NiO heterostructures sensor on calcination temperature. The ZnO/NiO-600 sensor, which was calcined at 600 °C, demonstrated the best sensing performance, achieving 3-fold sensitivity enhancement over pure ZnO. Under UV irradiation, the response value to 1 ppm NO 2 reaches 6.78, with corresponding response and recovery times of 15 s and 40 s, respectively. Furthermore, the ZnO/NiO-600 sensor exhibits an exceptional detection limit as low as 20 ppb and a strong linear response within the range of 20 ppb–1 ppm (R 2 = 0.994). The excellent sensing performance can be attributed to the synergistic effect of several factors, including the mesoporous structure of MOF-derived MOS materials, the formation of ZnO/NiO heterostructures, and UV irradiation. This work provides a promising strategy for the development of a novel Bi-MOF-derived MOS heterosturcture that can be applied to photoelectric gas sensor.
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OPTICS LETTERS
·
2018
·Vol. 43
·期 10
·2244-2247
·
IF 3.589
Ruibin Lin,Liang Hu,Jinzhang Wang,Wenjing Zhang,Shuangchen Ruan,Yu-Jia Zeng
© 2018 Optical Society of
America
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