Journal of Environmental Chemical Engineering
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2025
·Vol. 13
·期 6
·120413
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IF 7.2
Yiting Lei,Yulong Ma,Yonggang Sun,Liqiong Wang
Lignin, a three-dimensional network biopolymer, presents catalytic challenges due to its recalcitrant C(aryl)–O/C(aryl)–C bonds and diverse oxygen functionalities. To address this, we engineered Mo 2 C-decorated Ni-Mo bimetallic catalysts (Ni- Mo 2 C@NC-x) via dopamine-mediated self-assembly, achieving unprecedented 2D nanosheet architectures. The optimized Ni-Mo 2 [email protected] exhibited a 10.2-fold surface area enhancement (230.4 m 2 ·g⁻ 1 vs. 22.6 m 2 ·g⁻ 1 for Ni@NC), maximizing accessible active sites. The highly dispersed MoC 2 phase enhanced the graphitization degree, facilitated electron transfer while simultaneously increased Lewis and Brønsted acid densities. Furthermore, the Mo 2 C phase effectively enriched Mo 5+ species, which promoted selective cleavage of C–O and C–C bonds via oxygen vacancy generation. The synergistic interplay between the Mo 2 C phase and Ni metal centers achieved 95.69 % lignin oil conversion with 85.25 % cycloalkane selectivity. This work establishes a multifunctional catalyst design paradigm where tailored defect-acid cooperativity overcomes lignin depolymerization-deoxygenation trade-offs.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Yanmei Zheng,Yinghua Zhang,Ziwei Hang,Jianghong Ouyang,Qichao Chen,Xinli Guo,Zupeng Chen
Hydrogen peroxide (H 2 O 2 ) photosynthesis coupled with biomass upgrading is a promising alternative to traditional oxidative routes, yet its efficiency is fundamentally constrained by slow water oxidation kinetics and reliance on sacrificial agents. Herein, a Ni-doped Bi 2 WO 6 /graphitic carbon nitride (Ni-BWO/CN) heterojunction is developed to investigate the coupling of H 2 O 2 photosynthesis and glucose oxidation, with an H 2 O 2 production rate of 2.275 mM h − 1 (2.5 times higher than BWO), alongside a glucose conversion rate of 27 % and 82 % selectivity toward arabinose. The enhanced performance is attributed to the Ni doping in the BWO lattice, which modulates the electronic structure and suppresses charge recombination. In situ FT-IR spectra reveal a superoxide-mediated two-electron reduction pathway for H 2 O 2 synthesis as well as glucose oxidation via ·O 2 − -mediated and ·OH-driven intermediate mechanisms. This strategy advances the sustainable production of H 2 O 2 and high-value chemicals through rational photocatalyst design.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Jiaqi Li,Yidan Zhang,Pingyu Luo,Chun Li,Fanming Zeng,Tiantian Sun,Hanhui Lei,Xiaoteng Liu,Chunbo Liu
Persulphate-based advanced oxidation technology efficiently and cost-effectively removes organic dyes from water but designing stable photocatalytic systems and understanding their reaction mechanisms remain key challenges. Metal–organic frameworks (MOFs) have attracted considerable research attention for degrading organic pollutants owing to their high porosity, tunable structure, and ease of modification. In this study, a series of M-MOF-74 (M = Co, Fe, Ni) photocatalysts are synthesized by a hydrothermal method for methylene blue (MB) degradation. Among them, the Co-MOF-74 photocatalytic synergetic peroxymonosulfate system exhibits high catalytic activity after 30 min of visible light irradiation. MB degradation efficiency reaches 94.8%, and the reaction rate constant is 0.210 min−1, which is approximately 19.44 times higher than the reaction rate constant of the original Co-MOF-74. Compared with Fe-MOF-74 and Ni-MOF-74, Co-MOF-74 exhibits better photocatalytic performance due to the dynamic changes in the valence state of cobalt, which more effectively facilitate the activation of PMS. In addition, this study analyses the possible degradation pathways of MB in water and toxicological evaluations of intermediate products, providing new insights for the effective removal of dyes in water.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Fan Yang,Jingrui Duan,Yan Chen,Huiying Meng,Wanying Zhang,Ruiting Li,Wen Luo,Yang Wu,Yong Wang,Peng Zhang,Yifan Zhang
In this study, a bimetallic Pt-Ni alloy catalyst, designated PN 0.5 /VCN 1 , was synthesized with the objective of enhancing the photocatalytic hydrogen evolution performance. Photoelectrochemical characterizations confirm that PN 0.5 /VCN 1 significantly improves light absorption, charge transfer efficiency, and proton adsorption/activation capability, leading to enhanced photocatalytic performance. The results demonstrate that under optimized conditions (300 W Xe lamp, lactic acid as the hole scavenger) PN 0.5 /VCN 1 achieves a hydrogen evolution rate of 8.77 mmol·g -1 ·h -1 (4079 times higher than pure CN) with remarkable stability. And stability tests over four cycles (20 h total) indicate no significant activity loss. This enhancement is attributed to the localized surface plasmon resonance (LSPR) effect of the alloy, interfacial electron redistribution, and synergistic metal-defect interactions. The modification strategy proposed in this study offers a rational and cost-effective approach for efficient photogenerated charge separation and accelerated proton reduction kinetics, providing a competitive advantage in the market. This work provides a foundation for designing high-performance photocatalytic systems.
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Sustainable Materials and Technologies
·
2025
·
IF 9.2
Zhiyi Guo,Tengfei Li,Hao Zhou,Changwei Tan,Ximei Wang,Shuhong Nie,Wenya Xu,Fangfang Pei,Xiuqing Meng,Xinzhou Wu,Xiaolian Chen,Wenming Su,Kai Zhao,Changqing Ye
Flexible electrochromic devices (FECDs) and electrochromic fabrics (ECFs) have attracted great attention in fashion clothing decoration and camouflage due to their low energy consumption and bi-stability. However, the complex and hierarchical structures of fabric substrates pose formidable challenges to the excellent and stable conductivity of ECFs. Here, we developed novel ECFs with excellent EC properties and outstanding stability by integrating FECDs with polyester fabric. Firstly, highly conductive silver (Ag)/nickel (Ni) mesh was heat-laminated on the thermoplastic polyurethane (TPU) film, serving as flexible electrode with high transmittance. On this basis, the FECDs exhibit an exceptionally high transmittance (46.4 %), rapid response time (bleaching for 0.5 s at 0.8 V and coloring for 0.9 s at −0.4 V), outstanding stability (2.6 % decreased after 5000 cyclic switching), and low-power consumption (<0.05 J per cycle in 60 cm 2 FECDs). By harnessing the thermoplastic property of TPU, the FECDs can be readily transferred to fabric for the realization of ECFs, without compromising their comprehensive performances. More importantly, the outstanding conductivity and mechanical stability of ECFs under various challenging conditions (mechanical bending, physical damage, etc.) are unparalleled. We believe the simple-structured high-performance ECFs would be promising for flexible smart textile in any textile-based markets, such as wearable and intelligence camouflage.
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SENSORS
·
2025
·Vol. 25
·期 9
·2634
·
IF 3.5
Mengxue Xu,Yihong Zhong,Hongpeng Zhang,Yi Tao,Qingqing Shen,Shumin Zhang,Pingping Zhang,Xiaochun Hu,Xingqi Liu,Xuhui Sun,Zhenxing Cheng
HighlightsWhat are the main findings?The problem of dichloromethane “poisoned” MOS materials was well solved.Gas sensing mechanism of dichloromethane on the MOS material was elucidate.What is the implication of the main finding?The best performance of significant response and excellent recoverability by the MEMS sensor to dichloromethane is attributed to a synergetic effect from Mo and Ni co-doping into SnO2.Kinetically, the transportation of dichloromethane molecules onto the surface determines the response process. Thermodynamically, the output steady electronic signal of the MEMS sensor follows the equations newly derived by statistical mechanics.The challenging problem of chlorine “poisoning” SnO2for poorly recoverable detection of dichloromethane has been solved in this work. The materials synthesized by Ni or/and Mo doping SnO2were spread onto the micro-hotplates (<1 mm3) to fabricate the MEMS sensors with a low power consumption (<45 mW). The sensor based on Mo·Ni co-doped SnO2is evidenced to have the best sensing performance of significant response and recoverability to dichloromethane between 0.07 and 100 ppm at the optimized temperature of 310 °C, in comparison with other sensors in this work and the literature. It can be attributed to a synergetic effect of Mo·Ni co-doping into SnO2as being supported by characterization of geometrical and electronic structures. The sensing mechanism of dichloromethane on the material is investigated. In situ infrared spectroscopy (IR) peaks identify that the corresponding adsorbed species are too strong to desorb, although it has demonstrated a good recoverability of the material. A probable reason is the formation rates of the strongly adsorbed species are much slower than those of the weakly adsorbed species, which are difficult to form significant IR peaks but easy to desorb, thus enabling the material to recover. Theoretical analysis suggests that the response process is kinetically determined by molecular transport onto the surface due to the free convection from the concentration gradient during the redox reaction, and the output steady voltage thermodynamically follows the equation only formally identical to the Langmuir–Freundlich equation for physisorption but is newly derived from statistical mechanics.
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ChemSusChem
·
2021
·Vol. 14
·期 4
·1140-1154
·
IF 8.928
Yongjian Niu,Chunhua Zhang,Yuanyuan Wang,Dong Fang,Linlin Zhang,Cheng Wang
Graphical Knight in shining armor : A dual-chainmail-bearing N-doped carbon layers and nanotubes encapsulating a metallic Ni core (Ni@NC@NCNT) showed outstanding stability and selectivity towards CO 2 reduction into CO at moderate potentials, outperforming NCNTs, Ni@NC with single chainmail, Ni@NC/NCNT with Ni@NC sitting on NCNTs, and most state-of-the-art catalysts. This was attributed to enhanced structure robustness, maintained local pH value and boosted CO 2 adsorption capacity and strength. It still remains challenging to simultaneously achieve high stability, selectivity, and activity in CO 2 reduction. Herein, a dual chainmail-bearing nickel-based catalyst (Ni@NC@NCNT) was fabricated via a solvothermal-evaporation-calcination approach. In situ encapsulated N-doped carbon layers (NCs) and nanotubes (NCNTs) gave a dual protection to the metallic core. The confined space well maintained the local alkaline pH value and suppressed hydrogen evolution. Large surface area and abundant pyridinic N and Ni δ + sites ensured high CO 2 adsorption capacity and strength. Benefitting from these, it delivered a CO faradaic efficiency of 94.1 % and current density of 48.0 mA cm −2 at −0.75 and −1.10 V, respectively. Moreover, the performance remained unchanged after continuous electrolysis for 43 h, far exceeding Ni@NC with single chainmail, Ni@NC/NCNT with Ni@NC sitting on the walls of NCNT, bare NCNT and most state-of-the-art catalysts, demonstrating structural superiority of Ni@NC@NCNT. This work sheds light on designing unique architectures to improve electrochemical performances.
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Journal of Energy Storage
·
2021
·
IF 6.583
XianYan Jiang,ShuPing Deng,JunJie Liu,Ning Qi,ZhiQuan Chen
In this work, metal oxide/metal@carbon (NiO/Ni@C) composites as electrode materials have been successfully prepared using the pillared Ni 2 (bdc) 2 (dabco) (bdc = 1,4-benzenedicarboxylic acid, dabco = 1,4-diazabicyclo[2.2.2]-octane) as the precursor. Owing to the multiple active sites (NiO, Ni and Carbon), rich oxygen defects, and abundant Ni 3 + , the NiO/Ni@C composites show excellent electrochemical performance. A maximum specific capacitance of 805.3 F g −1 at 0.5 A g −1 and 576.2 F g −1 at 10 A g −1 is obtained for the NiO/Ni@C electrode material calcined at 500 °C, indicating a high rate capability. Meanwhile, the assembled asymmetric supercapacitor (ASC) NiO/Ni@C//PEDOT-AC (poly(3,4-ethylenedioxy-thiophene)-activated carbon) has a wide working voltage of 0–1.7 V, high specific energy of 20.7 W h kg −1 , superior specific power of 12920 W kg −1 , and excellent cycle stability with capacitance retention of 69.7% after 10 000 cycles. Furthermore, a red light-emitting diode (LED) is lighted up by two NiO/Ni@C//PEDOT-AC ASCs in series connection.
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ACS Applied Materials & Interfaces
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2021
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IF 9.229
Yongxia Zhang,Yunfeng Qiu,Yanping Wang,Bing Li,Yuanyuan Zhang,Zhuo Ma,Shaoqin Liu
Electrochemical water splitting into hydrogen is a promising strategy for hydrogen production powered by solar energy. However, the cell voltage of an electrolyzer is still too high for practical application, which is mainly limited by the sluggish oxygen evolution reaction process. To this end, hybrid water electrolyzers have drawn tremendous attention. Herein, coaxial Ni/Ni3S2@N-doped nanofibers are directly grown on nickel foam (NF), which is highly active for hydrogen evolution reaction. Meanwhile, the Ni3S2@N-doped nanofibers on NF prepared in an Ar atmosphere display superior urea oxidation reaction performance to previously reported catalysts. The cell voltage is about 1.50 V in urea electrolysis to deliver a current density of 20 mA cm–2, lower than that of a traditional water electrolyzer (1.82 V). The current density is around 77% relative to its initial value of 20 mA cm–2 after 20 h, superior to Pt/C|Ir/C-based urea electrolysis (14%). It is found that the synergistic effect between metallic Ni and Ni3S2, as well as the interfacial effect between metal centers and N-doped carbon, favors the initial dissociation of H2O and the adsorption/desorption of H* with thermal neutral Gibbs free energy. Meanwhile, the in-situ generated NiOOH on the outer surface of Ni3S2 possessed lower electrochemical activation energy for urea decomposition. Meanwhile, the abundant oxygen vacancies in electrodes could expose more active sites for the adsorption of intermediates, including H* and OOH*. It is also found that the hierarchical nanostructure of densely packed nanowires provides ideal electronic and ionic transport paths for fast electrocatalytic kinetics. The present work indicated that the modulation of compositions and hierarchical nanostructure is effective to prepare efficient catalysts for H2 production via urea electrolysis.
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ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Ziqiang Wang,Zechuan Dai,Hongjie Yu,Hugang Zhang,Wenjing Tian,You Xu,Xiaonian Li,Liang Wang,Hongjing Wang
Electrochemical ammonia synthesis is considered as an alternative sustainable method to the traditional Haber–Bosch process because of the reduced energy consumption and mild operation conditions. The key is to design efficient electrocatalysts for facile adsorption and activation of nitrogen. Herein, a nanoporous Pd film with a tunable pore size has been in situ grown on Ni foam (nPd/NF) via a micelle-assisted replacement method using NF as a reductant and substrate, where polystyrene-b-poly(ethylene oxide) and 1,3,5-triisopropylbenzene serve as a pore-forming agent and a swelling agent, respectively. Combining the continuous large nanoporous structure and self-supported properties, the obtained nPd/NF exhibits excellent catalytic performance for ammonia synthesis with a high NH3 yield of 18.27 μg h–1 mgcat–1 and a faradaic efficiency of 10.36% in 0.1 M Na2SO4. This work provides a fascinating route for the rational design of self-supported porous noble metals with a tunable pore size for effective electrosynthesis of ammonia.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Debo He,Yizhu Gong,Jiupai Ni,Chengsheng Ni
Solid oxide fuel cells (SOFCs) operating at a high temperature can be used to generate electricity and produce syngas from hydrocarbon fuels. In this work, the in-situ decoration of CeO 2 and Ni nanoparticles on the surface of chromite anode has been explored; i.e. , the exsolution of CeO 2 from La 0.75 Ce 0.05 Ca 0.2 Cr 0.9 Ni 0.1 O 3 (Ce-LCN) can be achieved in the oxygenation in air to boost the exsolution of Ni 0 under the fuel condition. The SOFC with a Ce-LCN anode showed higher performance and better stability under propane and H 2 fuel than the one La 0.8 Ca 0.2 Cr 0.9 Ni 0.1 O 3 (LCN) anode because of the formation of CeO 2 and Ni 0 nanoparticles. Setting in the distribution of H 2 in the existing natural gas pipeline, hydrogen-injection in CH 4 (20% H 2 in volume in CH 4 ) was found for the first time to efficiently improve the coking resistance of the anode because the H 2 was able to boost the transfer of oxygen from the anode to the direct internal reforming. The conversion of CH 4 was found to be around 85% and the selectivity for CO was close to unity. This study provides a viable solution to the design of complex perovskite SOFC to produce electricity and syngas simultaneously from CH 4 .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Zongtang Liu,Congcong Ding,Pingting Gao,Yunxia Xu,Yufeng Sun,Xiaoju Wen,Jingtao Dai,Zhenghao Fei
For the first time, the dechlorination of 2,6-dichlorophenol (2,6-DCP) by carbon nanotubes supported Fe/Ni nanoparticles (CNTs-Fe/Ni) was studied to explore the practicability of environmental remediation. Removal capacity of CNTs-Fe/Ni for 2,6-DCP was enhanced obviously compared to Fe/Ni due to reduced aggregation of Fe/Ni nanoparticles .The removal efficiency increased as the increase of CNTs-Fe/Ni dosage and Ni loading, whereas it decreased as the increase of 2,6-DCP concentration. Weak acidic condition was considered to be advantageous to 2,6-DCP dechlorination. The dechlorination kinetics results suggested that the 2,6-DCP removal by CNTs-Fe/Ni accorded with pseudo-first-order equation. Moreover, carbon nanotubes as support accelerated the mass transfer of 2,6-DCP from solution to catalyst surface and promoted the formation of atomic hydrogen, which also led to an enhancement of reactivity of CNTs-Fe/Ni on removing 2,6-DCP.
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