APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yunxu Yang,Xiaoxi Huang,Yong Shen Chua,Hooi Ling Lee
Fe–SnO 2 @NiO–NF removed 96.85% CIP within 150 min under solar light. • S-scheme heterojunction promotes charge separation and photocatalytic activity. • 3D NiO–NF support enables easy recovery and abundant active sites. • Over 94% degradation activity was retained after four cycles. • DFT and HPLC–MS reveal charge transfer and CIP degradation pathways. Photocatalysis is effective for antibiotic degradation but limited by poor charge separation and difficult recovery of powder catalysts. In this work, a macroscopic p–n heterojunction photocatalyst (Fe–SnO 2 @NiO–NF) was prepared on pre-oxidized nickel foam through in situ growth and microwave-assisted synthesis. XRD confirmed the coexistence of SnO 2 and NiO phases, while HRTEM and XPS analyses verified the successful construction of the Fe–SnO 2 /NiO heterojunction with intimate interfacial contact and interfacial electronic interaction. UV–vis DRS, PL, TRPL, EIS, and photoelectrochemical measurements demonstrated markedly improved light absorption, charge separation and transfer behavior, with a narrowed band gap of 2.92 eV and a prolonged average carrier lifetime of 1.2226 ns. Owing to the enhanced charge separation and the conductive 3D NiO–NF framework, Fe–SnO 2 @NiO–NF exhibited significantly improved photocatalytic activity for ciprofloxacin degradation under solar irradiation, reaching 96.85% removal within 150 min, while the immobilized catalyst could be readily separated from the aqueous solution. ESR and scavenging test identified •O 2 – and h + as the main reactive species, with •O 2 – playing the dominant role, while HPLC–MS revealed the degradation intermediates and pathways. Band structure analysis and DFT calculations demonstrated that the p–n heterojunction follows an S-scheme charge transfer mechanism, promoting efficient charge separation while preserving strong redox capability. The composite retained over 94% of its initial activity after four cycles, showing excellent stability and recyclability. This study provides a practical way to develop efficient and reusable photocatalysts for antibiotic wastewater treatment. Download: Download high-res image (182KB) Download: Download full-size image
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Materials
·
2026
·Vol. 19
·期 9
·1677
·
IF 3.7
Fangsheng Liu,Enming Shi,Zhiqiang Cao,Yeqing Wang,Xuemei Ou,Zhen Wang,Xinyi Han,Shiru Le,Zhijiang Wang,Chunlong Cheng,Fangjun Jin
HighlightsAn in situ reduction–oxidation reconstruction method is proposed to regenerate sinter-degraded NiO-based monolithic ceramic catalysts, effectively reversing NiO agglomeration and coarsening caused by high-temperature sintering.The reconstructed catalyst exhibits remarkably boosted activity and long-term durability for methane oxidation in ventilation air, with robust thermal cycling and reversible steam tolerance.Structural and interfacial regulation synergistically increases active site density and optimizes mass transfer, offering a feasible route to develop sintering-resistant monolithic ceramic catalysts.Monolithic ceramic catalysts are a key technology for the industrial treatment of coal mine ventilation air methane (VAM). The preparation of straight-channel NiO/CeO2monolithic ceramic catalysts via phase inversion addresses critical bottlenecks for industrial VAM abatement. However, high-temperature sintering leads to irreversible NiO agglomeration and coarsening, severely reducing catalytic activity. In this study, an in situ reduction–oxidation reconstruction method is developed to regenerate sinter-degraded NiO. The reconstructed catalyst increases methane conversion from below 70% after sintering to over 95% at 550 °C and achieves full conversion at 600 °C. The catalyst maintains near 100% conversion during 400 h of continuous operation at 600 °C and shows no performance degradation over 15 thermal cycles. Moreover, the reconstructed catalyst exhibits excellent steam tolerance with fully reversible deactivation. The reconstructed catalyst presents a refined porous structure with BET surface area rising from 4.5 to 11.4 m2g−1, an elevated Ni3+/Ni2+ratio (1.47 to 1.97), a higher surface adsorbed oxygen proportion (36.8% to 48.7%) and significantly strengthened NiO-CeO2interfacial interaction. This work provides a facile and efficient in situ regeneration strategy, greatly enhancing the VAM oxidation activity and stability of sinter-degraded monolithic ceramic catalysts.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Hesham Y. Amin,Safia Abdullah R. Alharbi,Abd El-razek Mahmoud,Essam A. Elkelany
Herein, a nickel-doped borate glass system, with variable additions of lead oxide, was prepared by melting and air quenching method. The impact of heavy lead oxide on structure, optical, electronic transitions, ligand field and nonlinear optical features was investigated. The glass structure was scrutinized by XRD, indicating the amorphousness of the current glass. The measured and empirical densities increased with lead oxide additions, indicating the densification of the network, while comparing both densities confirms the randomness of the glass network. Infrared spectra confirmed the deteriorated existence of non-bridging oxygen (NBO) bonds and the high ability of lead oxide to modify the glass network and form different structural units such as Pb . The current optical studies revealed the existence of ions in octahedral coordination, with high optical activity within some of the optronic transitions that were observed in visible and infrared regions. Among these optronic transitions, the transitions at 429, 524, 805 and 1222 nm were exploited using a Gaussian deconvolution process to determine the splitting energy and Racah parameters. Bewitchingly, the splitting energy increased; meanwhile, the Racah B and C parameters decreased, indicating that the lead addition increased the ligand- ions interaction energy and decreased the internal electronic interactions inside d-orbitals of ions. As a result of these interactions, the covalent bonding nature increased. Furthermore, lead oxide additions push the glass edges toward low energy, mitigating the optical band gaps from 3.41 eV to 2.92 eV, while Urbach energy increased due to enhanced amorphousness. Due to the higher polarizability of lead ions, the linear and non-linear optical properties of current glasses are enhanced.
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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Jiongyue Hao,Chun Huang,Hangyu Liu,Wen Niu,Xuefeng Chen,Kazuki Nagashima,Zetao Zhu,Mati Horprathum,Fuguo Wang,Gang Meng,Di Peng,Maozhu Zhang,Rui Yang,Wei Hu,Xiangshu Miao,Yongcai Guo,Yong He
Artificial olfaction systems face a fundamental trade-off between device simplicity and discriminative capacity, particularly in detecting target gases within complex mixtures. While biological olfaction leverages dynamic sniffing strategies to enhance selectivity with limited receptors, conventional electronic noses rely on sensor arrays, increasing system complexity and power consumption. Here, we report a bio-inspired pseudo-breathing strategy coupled with a single SnSe/NiO heterojunction sensor to achieve highly selective H 2 S detection in mixed volatile sulfur compounds (VSCs) backgrounds. The heterojunction design creates enhanced surface activity and facilitates rapid charge carrier exchange, enabling fast and sensitive operation at room temperature. By implementing rhythmic adsorption-desorption cycles, we generate time-resolved spectral fingerprints that encode analyte-specific information. Combined with pattern recognition algorithms, this approach allows a single sensor to distinguish H 2 S from interfering VSCs in binary/ternary mixtures. This work demonstrates a paradigm for the classification of H 2 S-containing volatile sulfur compound (VSC) mixtures using an actively modulated single sensor, bridging materials innovation and dynamic sensing mechanisms to overcome the limitations of array-based systems.
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高影响因子
Catalysts
·
2025
·Vol. 15
·期 11
·1016
·
IF 4
Yun Xu,Tianfa Tang,Pengyao Wang,Chunlei Zhang,Jianbo Zhao,Ke Zhuang,Changjin Tang
The fabrication of highly loaded and uniformly dispersed metal oxide nanoparticles (NPs) is much desired but still remains a great challenge. Herein, the NiO NPs exclusively confined in mesoporous silica SBA-15 were obtained by using nickel nitrate hydrate as a precursor through a facile solvent-free preparation method, which comprised manual grinding of Ni(NO3)2·6H2O with SBA-15 and subsequent air calcination. Characterization results from X-ray diffraction (XRD) and transmission electron microscope (TEM) revealed that aggregation-free NiO nanoparticles with sizes of 3–5 nm were obtained at loading as high as 20wt.% (weight%). Further increasing the NiO loading to 30wt.% led to partial agglomeration of discrete nanoparticles to rod-like particles, while no external particles were observed. By comparing the sample derived from nickel acetate with exclusively external NiO particles, it was established that the pore confinement provided NiO nanoparticles with high thermal stability. Lastly, the catalytic performance of the prepared sample was evaluated in the model reaction of ammonia decomposition to COx-free H2, and the stable NH3conversion of 93.7% was achieved at the weight hourly space velocity (WHSV) value of 30,000 mL·g−1·h−1and at high temperature of 650 °C for 60 h, demonstrating the great potential of the solvent-free method in preparing thermally stable and robust supported catalysts.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Norah Salem Alsaiari,Muhammad Azhar Mumtaz,Khaled Alsaikhan,A.M. Afzal,Hussain Sawwan,Abdelfattah Amari,Sohail Mumtaz,M.A. Diab,Muhammad Hamza Waris
A novel electrode material, BiCo-MOF@NiO/PANI/rGO, was prepared through a low-cost hydrothermal method. The crystallinity and surface morphology were analyzed using XRD and SEM, and the BET study confirmed a specific surface area of 314 m 2 /g. Electrochemical testing showed that BiCo-MOF@NiO/PANI/rGO (B2) delivered a high specific capacity (Qs) of 431.66 mAh g −1 at 1.5 A g −1 , which is significantly greater than that of BiCo-MOF@NiO (100.08 mAh g −1 ) and BiCo-MOF@NiO/PANI (242.95 mAh g −1 ). Under a two-electrode asymmetric configuration, the device attained a Qₛ of 132.37 F/g at 0.7 A/g and maintained 83.3 % capacity after 10,000 cycles. It also offered a high energy density of 81.2 Wh kg −1 and a power density of 2695.7 W kg −1 . In addition to energy storage capabilities, the material exhibited notable electrocatalytic behavior for the HER, with a low Tafel slope (Ts) of 47.62 mV dec −1 . The outcomes highlight the composite's potential as a multifunctional material for both energy storage and electrocatalysis, paving the way for next-generation sustainable technologies.
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CARBON
·
2026
·
IF 11.6
Lijuan Cai,Shengxiang Xiong,Jun Chen,Yu Su,Jiyuan Cong,Gang Chen,Chengjun Dong,Hongtao Guan
In response to the burgeoning challenge of electromagnetic wave pollution, the development of high-performance electromagnetic wave absorbing materials with strong attenuation capability is urgently needed. In this study, a MXene/NiO nanowire hybrid aerogel was constructed via electrostatic self-assembly, leveraging a multi-mechanism synergistic loss strategy to significantly enhance the electromagnetic absorbing performance. The three-dimensional conductive network of the material optimizes impedance matching, facilitating electromagnetic wave penetration into the interior for multiple reflections and scattering, thereby reducing surface reflection. Simultaneously, the highly conductive MXene contributes to substantial conduction loss, while abundant defects (graphitic defects, oxygen-containing groups) and heterogeneous interfaces (MXene-NiO) induce notable dipole and interfacial polarization losses. Furthermore, the nano-heterostructure formed between NiO nanowires and MXene enhances interfacial polarization through charge accumulation at the interfaces. Benefiting from these synergistic loss mechanisms, the optimized aerogel exhibits exceptional electromagnetic wave absorption performance, achieving a minimum reflection loss ( RL min ) of −53 dB at a thickness of 1.6 mm and an effective absorption bandwidth (EAB) of 4 GHz. Our findings propose an innovative materials design doctrine enabling precise multi-scale regulation of electromagnetic wave absorption in aerogels.
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Catalysts
·
2023
·Vol. 13
·期 3
·588
·
IF 3.9
Haiou Zhang,Yixin Zhang,Huikang Song,Yan Cui,Yingying Xue,Cai-e Wu,Chao Pan,Jingxin Xu,Jian Qiu,Leilei Xu,Mindong Chen
As a toxic pollutant, carbon monoxide (CO) usually causes harmful effects on human health. Therefore, the thermally catalytic oxidation of CO has received extensive attention in recent years. The CuO-based catalysts have been widely investigated due to their availability. In this study, a series of transition metal oxides (Fe2O3, Co3O4and NiO) promoted CuO-based catalysts supported on the α-MnO2nanowire catalysts were prepared by the deposition precipitation method for catalytic CO oxidation reactions. The effects of the loaded transition metal type, the loading amount, and the calcination temperature on the catalytic performances were systematically investigated. Further catalyst characterization showed that the CuO/α-MnO2catalyst modified with 3 wt% Co3O4and calcined at 400 °C performed the highest CO catalytic activity (T90= 75 °C) among the investigated catalysts. It was supposed that the loading of the Co3O4dopant not only increased the content of oxygen vacancies in the catalyst but also increased the specific surface area and pore volume of the CuO/α-MnO2nanowire catalyst, which would further enhance the catalytic activity. The CuO/α-MnO2catalyst modified with 3 wt% NiO and calcined at 400 °C exhibited the highest surface adsorbed oxygen content and the best normalized reaction rate, but the specific surface area limited its activity. Therefore, the appropriate loading of the Co3O4modifier could greatly enhance the activity of CuO/α-MnO2. This research could provide a reference method for constructing efficient low-temperature CO oxidation catalysts.Keywords:transition metal oxides;CuO-based catalysts;Co3O4modification;α-MnO2nanowire;catalytic oxidation of CO
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiayi Qi,Xingkun Qi,Yan Pan,Junshuo Cui,Ying Xiong,Weijun Shan,Haibiao Yu
Sm 0.06 Ni with excellent H 2 O resistance for eliminating N 2 O was prepared by co-precipitation method. Research indicated that the introduction of Sm into Sm 0.06 Ni has the following effects: (1) Sm species (Sm 2 O 3 ) highly dispersed on the surface of Sm 0.06 Ni catalyst, which not only decreased the crystallite size of NiO, but also produced a certain number of edge dislocations and defects. (2) Sm 2 O 3 weakened the Ni-O band and increased the number of active sites. (3) The redox cycle of Ni 2+ + Sm 3+ ↔ Ni 3+ + Sm 2+ was formed on the surface of Sm 0.06 Ni during the reaction. Based on the above changes, Sm 0.06 Ni exhibited superior catalytic performance and much lower E a for the reaction compared with pure NiO. Over Sm 0.06 Ni, the TOF at 350 ℃ was 4.1 × 10 −3 s −1 , 37 times of that over pure NiO. More importantly, Sm 0.06 Ni exhibited excellent H 2 O resistance performance under submitted real reaction conditions, about 76 % N 2 O conversion can be obtained at 400 ℃.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Tiantian Li,Kaige Liu,She Wang,Zhihang Liu,Guizhen Liao,Zhenyu Chen,PeiKang Shen
Lithium-sulfur batteries (LSBs) have enormous application potential in the flexible energy storage field due to their large theoretical specific capacities and high energy densities. However, lithium-sulfur batteries face a notorious shuttle effect problem. To address this challenge, this work reports a three-dimensional (3D) structure of binary transition metal selenides (B-TMSe) hierarchical composites (CC/NiCoSe 2 -NiO) on carbon cloth as a self-supporting sulfur host for flexible LSBs. According to the density functional theory (DFT) calculations, NiCoSe 2 can exert a synergetic effect of high affinity with Lithium polysulfides (LiPSs) and electrocatalytic activity to lower the adsorption energy barrier and accelerate the sluggish reaction kinetics of polysulfides. Consequently, the CC/NiCoSe 2 -NiO-based electrodes realize a large specific capacity of approximately 1363 mAh/g at a current density of 0.1C, excellent rate performance (454.66 mAh/g at 5C) and a reversible specific capacity of 978.9 mAh/g at 1C, along with impressive cycling stability with an attenuation rate of 0.038% per cycle for 1000 cycles. They also achieve a large reversible cycle capacity of 919.43 mAh/g at 0.2C even at a high sulfur loading (3.5 mg/cm 2 ). With a lean electrolyte (E/S ratio 10 µL/mg) and a high sulfur loading of 2.65 mg/cm 2 , a large capacity of 934.1 mAh/g is retained after 150 cycles at 0.5C. The assembled pouch cells from S@CC/NiCoSe 2 -NiO electrodes show a high initial discharge capacity of 1039.5 mAh/g at 1C at a sulfur loading of 2.65 mg/cm 2 and maintain strong stability under high twisting and buckling.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jiao Wang,Feng Zheng,Mingjun Li,Donghua Jia,Xiaodong Mao,Jifang Fu,Pengfei Hu,Qiang Zhen,Yi Yu
In this paper, four NiO nano-arrays with different morphology on nickel foam were synthesized by a hydrothermal approach. It is found that the porous single crystal NiO nanoflake array (PNFA) holds superior electrochemical properties , better than the other three samples. The specific capacitance of the PNFA obtained from the cyclic voltammetry curve was 716 F g −1 and that derived from the galvanostatic charge-discharge curve was 589 F g −1 in three-electrode system. The cycling stability of the PNFA could retain as high as 92.4% after 5000 cycles. When the PNFA was assembled into a symmetric supercapacitor , the PNFA//PNFA device exhibited an energy density of 39.3 W h kg −1 (at 550 W kg −1 ) and could retain 13.2 W h kg −1 (at 11,000 W kg −1 ) in two-electrode system. Furthermore, the SEM, XRD, TEM and XPS results prove that the PNFA is a special porous single crystal structure, which combines the advantages of the cross-linked single crystal structure for facilitating electron transfer and the porous structure providing more interfaces for insertion/exit of electrolyte ions from the active material. It indicates that the PNFA is a potential electrode material for supercapacitors .
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Xuehui Li,Yujie Peng,Tao Tian,Dantong Wang,Xiaozhen Ren,Xipeng Pu
Facing environmental pollution, the development of semiconductor photocatalysts with efficient electron-hole pairs separation is necessary for better performance optimization and utilization. Here, a direct Z-scheme BiOBr–NiO-x% (x = 5, 10, 20, 30) photocatalysts with outstanding photocatalytic activity for dye degradation were prepared via the hydrothermal process. The XRD, XPS , FESEM, HRTEM and UV–vis DRS were used to characterize the components, phase structure, morphology and optical properties of the prepared samples. The prepared nano-flower like BiOBr–NiO-x% (x = 5, 10, 20, 30) composites had an extensive visible light absorption range and more vigorous absorption intensity than pure BiOBr. All the prepared composites exhibited better photocatalytic activity for rhodamine (RhB) degradation than that of pure BiOBr, with BiOBr/NiO-20% showing the best photocatalytic efficiency. The photocatalytic efficiency had reached 98% within 50 min for the BiOBr/NiO-20% composite. Due to the tight interfacial contact and matching band positions between BiOBr and NiO, a direct Z-scheme BiOBr/NiO heterojunction was built, which accelerated the visible light absorption, superior separation of photoinduced electron-hole pairs in space and improved the oxidation and reduction capacity of the catalysts, further leading to the excellent photocatalytic activity for degradation of RhB.
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