CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Renquan Wu,Yijing Sun,Xuzhou Jiang,Shanxin Li,Sichen Guo,Hongying Yu
In response to the increasing challenges posed by electromagnetic pollution, The development of high-performance microwave absorbing materials is increasingly urgent. This study addresses this challenge through synergistic engineering of hierarchical architectures and magnetic-dielectric components, proposing a sequential templating strategy to fabricate hierarchical multi-shell hollow porous (HMSHP) NiO/Co 3 O 4 nanospheres. Systematic characterization reveals that the HMSHP architecture can effectively improve the impedance matching, reduce the material density, extend the microwave transmission path, and significantly enhance the conduction loss and interface polarization loss. In addition, the NiO/Co 3 O 4 heterointerfaces induce polarization loss caused by lattice defects in the shell and magnetic loss due to the magnetic metal oxide components, which synergistically enhance electromagnetic energy conversion. The 3-shell hollow porous NiO/Co 3 O 4 nanospheres (3-NCO) demonstrated superior microwave absorption performance. Specifically, at a low filler ratio (20 wt%) and a thin thickness (2.1 mm), the 3-NCO nanospheres exhibited a significant absorption capacity (−67.62 dB) and a wide effective absorption bandwidth (7.68 GHz). This work reveals a nanostructure design route for designing lightweight, broadband microwave absorbers through rational integration of structural hierarchy and interfacial engineering, offering actionable strategy to fabricating novel microwave absorption nanomaterials.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xiaoxue Cheng,Chenchen Li,Qifan Ling,Xinyu Wang,Jiangshan Zhang,Kexin Zhang,Naparat Kasetsomboon,Shuang Wang,Ding Jiang
Vanillonitrile (VN), a valuable pharmaceutical intermediate, is traditionally synthesized through toxic cyanide-based routes. Herein, we report a green, two-step approach for VN synthesis starting from vanillin (VL), a lignin-derived platform molecule. The process integrates solvent-assisted condensation and catalytic pyrolysis, supported by mechanistic insights from density functional theory (DFT). In the first step, vanillin azine (VA) is selectively synthesized in ethanol, with solvent polarity and noncovalent interactions governing reaction kinetics and selectivity. Pyrolysis experiments and quantum chemical calculations reveal that hydrogen-transfer-induced N–N bond cleavage is the dominant route for VA conversion. A heterostructured Ni/NiO@CN catalyst featuring interfacial Ni–N sites was developed to lower activation energy and promote electron redistribution, enhancing VN selectivity to 57.2%. Surface potential and spin polarization analysis further confirmed efficient electron transfer pathways. This work provides a sustainable and efficient route to nitrogen-containing fine chemicals from renewable lignin and offers mechanistic guidance for future biomass-based catalytic designs.
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高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 19
·1471
·
IF 4.3
Liming Song,Xiaoxin Dou,Jianmei Shao,Yuanzheng Luo,Fumiao Liu,Chengyong Li,Lijuan Yan,Chuhong Wang,Yuting Li,Yuqing Cai,Jinsheng He,Zhenqing Dai,Ruikun Sun,Qin Xie
Hierarchical NiO-SnO 2 nanoflowers were prepared via a one-step hydrothermal method. The morphology, structure and components of the hierarchical NiO-SnO 2 nanoflowers were examined via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The ethanol gas-sensing performance was systematically analyzed between pure hierarchical SnO 2 nanoflowers and the hierarchical NiO-SnO 2 nanoflowers. The results indicated that the hierarchical NiO-SnO 2 nanoflowers showed better gas-sensing properties than the pure hierarchical SnO 2 nanoflowers at 164 °C. The enhanced gas-sensing performance was ascribed to the formation of p-n heterojunctions between p-type NiO and n-type SnO 2 . Additionally, NiO has a catalytic role. Therefore, hierarchical NiO-SnO 2 nanoflowers could be a potential gas-sensing material for the fabrication of high-quality ethanol gas sensors.
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PubMed
高影响因子
Small
·
2019
·Vol. 15
·期 30
·1902280
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IF 10.856
Xijun Wei,Wanping Hu,Huarong Peng,Yuli Xiong,Peng Xiao,Yunhuai Zhang,Guozhong Cao
High energy and efficient solar charging stations using electrochemical capacitors (ECs) are a promising portable power source for the future. In this work, two kinds of metal-organic framework (MOF) derivatives, NiO/Co 3 O 4 microcubes and Fe 2 O 3 microleaves, are prepared via thermal treatment and assembled into electrochemical capacitors, which deliver a relatively high specific energy density of 46 Wh kg −1 at 690 W kg −1 . In addition, a solar-charging power system consisting of the electrochemical capacitors and monocrystalline silicon plates is fabricated and a motor fan or 25 LEDs for 5 and 30 min, respectively, is powered. This work not only adds two novel materials to the growing categories of MOF-derived advanced materials, but also successfully achieves an efficient solar-ECs system for the first time based on all MOF derivatives, which has a certain reference for developing efficient solar-charge systems.
研究领域:
材料科学
·
电化学
·
能源存储
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纳米材料
·
可再生能源
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高影响因子
ACS Catalysis
·
2026
·Vol. 16
·期 15
·14804-14817
·
IF 13.6
Liu Hongjing,Ren Shan,Li Xiaodi,Liu Manyi,Chen Peng,He Chi,Bai Bofeng,Chai Shouning,Dong Fan
Efficient photocatalytic mitigation of nitrogen oxides (NO x ) under ambient conditions remains challenging due to limited charge-carrier separation and poor selectivity in regulating reactive oxygen species (ROS), which often results in undesirable NO 2 accumulation. In this study, bismuth molybdate (Bi 2 MoO 6 ) was employed as a model photocatalyst, on which dual active sites composed of plasmonic metallic Bi nanoparticles and ultrasmall spin-polarized NiO were in situ constructed. Plasmonic Bi enhances visible-light absorption and hot-electron generation via localized surface plasmon resonance, while NiO establishes a spin-selective electron-transfer pathway that facilitates efficient O 2 activation. This cooperative interface suppresses exciton recombination and promotes a superoxide (·O 2 – )-dominated oxidation pathway. Consequently, the optimized Bi-NiO@BMO achieves 77.0% NO removal, 76.7% nitrate selectivity, and minimal NO 2 accumulation (<11 ppb), representing a 9.7-fold enhancement compared with pristine Bi 2 MoO 6 . In practical applications, the PTFE-assisted loading technique allows the material to be fixed onto ceramic foam, achieving an 84% NO removal efficiency and further enhancing photocatalytic performance. Spectroscopic analyses combined with density functional theory (DFT) calculations confirm that the plasmon–spin interaction lowers the free-energy barriers for ·O 2 – formation and deep NO oxidation. This work provides a mechanistic insight into plasmon-spin-regulated ROS generation and offers a rational design strategy of highly selective photocatalysts for environmental NO x abatement.
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ACS Sensors
·
2026
·
IF 10.9
Yang Zeng,Xiaowei Li,Haipeng Dong,Chaohan Han,Yunpeng Yin,Xinyu Wu,Xinghua Li,Changlu Shao,Yichun Liu
The construction of a p–n semiconductor heterostructure has been recognized as an effective strategy to achieve high-performance gas sensing. However, the opposite resistance change (signal transducer function) behaviors of p-type and n-type sensing materials in response to the same target gas significantly limit the overall transducer function within the p–n heterostructure. In this study, we designed p-NiO/n-ZnO Janus hollow nanofibers that feature an ordered built-in electric field, enabling directed charge separation and confinement of the conduction path to the ZnO outer layer. The design of the Janus architecture effectively mitigates the conflicting electrical responses of p-NiO and n-ZnO to acetone gas. Therefore, the sensors exhibit a response that is threefold higher than mixed NiO/ZnO nanofibers and sevenfold higher than pristine ZnO nanofibers, illustrating the pronounced transducer enhancement enabled by the Janus configuration. Furthermore, by precisely controlling the ZnO shell thickness, we demonstrate a Debye-length-regulated gas-sensing amplification mechanism. This work establishes a general strategy for nanoscale heterostructure engineering, paving the way for the development of high-performance MOS gas sensors with superior signal transducer function.
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PubMed
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Guosong Wang,Dong Zhang,Yihui Song,Haitao Meng,Dan Li,Chong Peng
Abstract Hydrodeoxygenation (HDO) of lignin derivatives is a promising strategy for biomass utilization, but its catalytic performance is often unsatisfactory for non-noble metal catalysts. This hinders the industrialization process of biomass utilization. Herein, we obtained a FeNi-Cop catalyst with a tightly coupled interface between FeNi alloy and NiO by a hydrotalcite-derived strategy. The effect of this interface on the p-cresol HDO was studied by XRD, HRTEM, H2-TPR, NH3-TPD, XPS, in situ FTIR, and DFT calculations. FeNi-Cop catalyst facilitates hydrogen activation and can promote the dehydration reaction of methylcyclohexanol, a key intermediate, through the electronic regulation of the interface and acid sites. High space-time yield (STY) of methylcyclohexane was obtained, and good catalytic performance could be maintained after 10 cycles. This tightly coupled alloy/oxide interface provides a feasible approach for the design of non-noble metal catalysts.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Jinjun Hu,Wei Meng,Shuang Qi,Ling Wang,Weiwei Meng,Yuehua Li,Lei Dai
Conventional sensing of nitrogen oxide (NO) is based on charge transfer reactions that occur exclusively at the triple-phase boundaries (solid electrolyte/sensing electrode/NO, TPBs). Here, an interface-engineered strategy is proposed to overcome this limitation by constructing a bidirectional mixed ionic-electronic conducting (MIEC) architecture. By modifying a porous YSZ scaffold with NiO to introduce an electron-conducting phase, a mixed conductive heterogeneous porous framework, NiO-YSZ, was formed. Subsequently, La 0.8 Sr 0.2 Co 0.2 Fe 0.8 O 3-δ (LSCF) active sensing phase was incorporated into this framework via an impregnation method, ultimately resulting in a 3D composite sensing electrode (LSCF-NiO-YSZ) that possesses both ionic and electronic conductivity. This design expands the active site region beyond TPBs and enables more efficient charge transfer. The influence of YSZ/NiO mass ratios was systematically examined, and sensors based on NiO-modified YSZ exhibited markedly higher response values and improved sensitivity compared to pristine YSZ. The optimal composition (YSZ/NiO = 5:5) delivered a sensitivity of 10.29 °·decade −1 with excellent reproducibility and selectivity at 500°C and 0.1 Hz. These results highlight interface conduction engineering as an effective route for achieving high-performance impedancemetric NO sensors.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yinghao Du,Dong Hao,Wei Yan,Jing Xu,Yuee Xie,Xiaohong Yan,Yuanping Chen
To address the limitations of traditional chemical methods and powder catalysts in photocatalysis, this study reports a novel physical vapor deposition (PVD) approach for constructing efficient and recyclable heterojunctions. Using electron-beam evaporation, the amorphous NiO film was deposited onto the surface of chemically synthesized TiO 2 /CdS precursors, ultimately yielding the flexible TiO 2 /CdS/NiO (TCN) multi-composite photocatalyst. The light absorption, charge carrier behavior, and degradation mechanism were investigated through UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), photoelectrochemical testing, and free radical trapping experiments. The prepared TCN composite material achieved a degradation efficiency of 96% for methyl orange (MO) within 60 min of visible-light irradiation, significantly outperforming pure TiO 2 (17%) and TiO 2 /CdS (41%). It also demonstrates broad-spectrum degradation capabilities for multiple antibiotics and exhibits excellent cycling stability. Mechanistic analysis indicates that both a Type-II heterojunction (TiO 2 /CdS) and a p-n heterojunction (CdS/NiO) are formed within the material. The built-in electric fields in both junctions are aligned, thereby synergistically promoting the efficient separation and migration of photogenerated electron-hole pairs. This work provides a new technical pathway and theoretical basis for designing practical, easily recyclable and highly efficient photocatalytic materials that minimize secondary pollution.
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Lijun Wang,Yujia Wang,Tianyu Hui,Shun Wang,Na Sun,Ying Zhi Bai,Wei Wei Tai,Qiao Han
The catalytic conversion of biomass-derived furfural (FAL) to cyclopentanone (CPO) via hydrogenation-rearrangement is a promising route for sustainable fine chemicals. Pt-based catalysts exhibit superior performance but suffer from limited control over hydrogenation behavior and reaction selectivity. To overcome these challenges, we designed a synergistic metal and metal oxide catalyst (1Pt3Ni/MCM-41). Introduction of NiO triggers strong electronic interaction with Pt, tuning both metal active sites and acidic centers. This interfacial electron transfer improves Pt dispersion on the mesoporous MCM-41 support, inhibits aggregation, and stabilizes the catalyst against sintering and leaching. Meanwhile, electron transfer from NiO modulates the electronic structure of Pt, promoting hydrogen dissociation and the formation of active hydrogen species. The charge redistribution also optimizes surface acidity, enhancing selective adsorption and activation of the C=O bond in FAL. Under mild conditions, the catalyst achieves 97.5% FAL conversion, 90.6% CPO selectivity, and a high activity of 883•h -1 . This work provides a rational strategy for designing high-performance bifunctional catalysts for efficient, selective upgrading of FAL to CPO.
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高影响因子
Coatings
·
2025
·Vol. 15
·期 7
·760
·
IF 2.8
Tianyi Yang,Song Xue,Liming Jiang,Jiuming Lei,Wenjing Li,Yiwei Han,Zhijie Wang,Jinlong Zuo,Yuyang Wang
Microbial fuel cells (MFCs) generate electricity through the microbial oxidation of organic waste. However, the inherent electrochemical performance of carbon felt (CF) electrodes is relatively poor and requires enhancement. In this study, nickel oxide (NiO) was successfully loaded onto CF to improve its electrode performance, thereby enhancing the electricity generation capacity of MFCs during the degradation of treated wastewater. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy diffusion spectrometer (EDS) analyses confirmed the successful deposition of NiO on the CF surface. The modification enhanced both the conductivity and capacitance of the electrode and increased the number of microbial attachment sites on the carbon fiber filaments. The prepared CF–NiO electrode was employed as the anode in an MFC, and its electrochemical and energy storage performance were evaluated. The maximum power density of the MFC with the CF–NiO anode reached 0.22 W/m2, compared to 0.08 W/m2for the unmodified CF anode. Under the C1000-D1000 condition, the charge storage capacity and total charge output of the CF–NiO anode were 1290.03 C/m2and 14,150.03 C/m2, respectively, which are significantly higher than the 452.9 C/m2and 6742.67 C/m2observed for the CF anode. These results indicate notable improvements in both power generation and energy storage performance. High-throughput gene sequencing of the anodic biofilm following MFC acclimation revealed that the CF–NiO anode surface hosted a higher proportion of electroactive bacteria. This suggests that the NiO modification enhances the biodegradation of organic matter and improves electricity generation efficiency.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 16
·19635-19643
·
IF 3.45
Zihao Song,Weigen Chen,He Zhang,Yanqiong Li,Wen Zeng,Sirui Tang,Chengzhi Zhu
Acetylene (C 2 H 2 ) gas concentration is a key parameter in transformer monitoring. In current work, the selective acetylene sensors which based on flower-like ZnO structures with NiO nanoparticles were successfully fabricated. The NiO–ZnO composites were synthesized by two-step hydrothermal method . And various of characterization analyses had been applied to the exploration of crystal structure and the p-n heterojunction . According to the systematic gas sensitivity tests, the response of NiO–ZnO (5%) to 50 ppm C 2 H 2 was 15.23 at 200 °C whereas the response of pure ZnO was 4.1 in the same condition. In addition, the response value of NiO–ZnO (5%) to 50 ppm C 2 H 2 was 3.6 times to 50 ppm H 2 . Such a good gas-sensing property of NiO–ZnO composites is due to p-n heterojunction and high catalytic activity of NiO.
研究领域:
材料科学
·
传感器技术
·
无机化学
·
纳米材料
·
电力设备监测
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高影响因子
危险品化学品经营许可证（带存储）