JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Zihan Liu,Mengxia Ji,Junze Zhao,Yi Zhang,Xing Sun,Yifan Shao,Huaming Li,Sheng Yin,Jiexiang Xia
Owing to the exorbitant CO 2 activation energy and unsatisfactory photogenerated charge separation efficiency, CO 2 photoconversion still faces enormous challenges. In this study, a directional electron transfer channel has been established by decorating N-doped carbon quantum dots (N-CQDs) on the surface of Bi 4 MoO 9 nanoparticles to ensure that more active electrons can participate in the CO 2 reduction. The conduction band of Bi 4 MoO 9 nanoparticles is calculated to be −1.55 eV versus the normal hydrogen electrode (NHE), pH = 7, which is negative enough to attain the photocatalytic CO 2 reduction potential of −0.53 eV versus NHE, pH = 7. CO 2 adsorption curves and in situ Fourier transform infrared spectra reveal that N-CQDs facilitate surface CO 2 adsorption and activation, as well as CO desorption. In addition, steady-state photoluminescence and photoelectrochemical tests prove that the charge separation efficiency can be greatly enhanced by constructing N-CQDs/Bi 4 MoO 9 composites. In the presence of pure water, N-CQDs/Bi 4 MoO 9 -2 composite achieved a CO yield of 16.22 μmol g −1 after 5 h Xe light illumination, which was 3.24 times higher than that of pure Bi 4 MoO 9 (4.98 μmol g −1 ). This study offers a distinctive approach to the optimization of Bi 4 MoO 9 photocatalysts and their application in energy conversion.
研究领域:
材料科学
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环境科学
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催化化学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yurun Tian,Fengyi Zhou,Zeyu Wang,Wenjun Chen,Rui Qin,Yu Chen,Tiancheng Mu
The substantial increase in spent lithium-ion batteries (SLIB) has resulted in serious environmental impacts that require attention and appropriate intervention. In this study, we designed a DES composed of ethylene glycol (EG) and hydroxylamine hydrochloride (NH 2 OH·HCl) with appropriate acidity, remarkable reductive property and strong coordination capability for the efficient one-step leaching of cobalt ions and lithium ions from LiCoO 2 (LCO). Following leaching at a modest temperature of 80 °C for 8 h, the solubility of LiCoO 2 reaches an 83.3 mg g −1 (much higher than previous works), accompanied by remarkably high leaching efficiencies of up to 99.7 % for lithium and 88.0 % for recovery of cobalt. Notably, this approach significantly enhances the solubility of the LiCoO 2 while upholding leaching efficiency. Importantly, this study achieves a one-step separation of lithium and cobalt, avoiding metal co-precipitation and simplifying the separation procedure. Furthermore, the residual components within the system can be reclaimed and recycled. This work provides an efficient and sustainable route for the recovery of precious metals from lithium-ion batteries, characterized by its cost-effectiveness and straightforward processing.
研究领域:
环境科学
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材料科学
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化学工程
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可持续技术
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DOI
高影响因子
JOURNAL OF CATALYSIS
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2026
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IF 6
Ning Zhu,Haiyun Huang,Jia Liu,Wenjie Zhang,Xinghua Zhang,Longlong Ma,Lungang Chen
The production of sustainable aviation fuels (SAF) via hydrodeoxygenation (HDO) of biomass-derived aldol-condensation intermediates has attracted extensive attention. In this work, a composite Nb 2 O 5 -γ-Al 2 O 3 supported Ni catalyst was designed to modify Ni reducibility and catalyst acidity for efficient HDO. We found that the formation of Nb-O-Al interfacial bonds effectively suppressed the generation of Ni-O-Al, significantly weakening the strong metal-support interaction (SMSI) inherent to γ-Al 2 O 3 and greatly enhancing the reducibility of Ni. As a result, the Ni 0 fraction increased from 27.01% on Ni/γ-Al 2 O 3 to 47.09% on 15Ni/N2A1. Meanwhile, the strong Lewis acidity associated with Nb 5+ provided crucial sites for C-O bond cleavage, while the intrinsic acidity and mesoporous structure of γ-Al 2 O 3 were preserved and further optimized within the composite support. TEM and CO-pulse measurements confirmed improved metal dispersion and reduced Ni particle size, collectively strengthening both hydrogenation and deoxygenation functions. The composite 15Ni/N2A1 catalyst achieved a high alkane yield of 79.6 wt% with initial reaction rate of 35.90 mmol·L −1 ·h −1 , in the HDO of the furfural-cyclopentanone aldol-condensation product, together with excellent substrate adaptability and cycling stability. Overall, the composite Nb 2 O 5 -γ-Al 2 O 3 enables synergistic regulation of Ni reducibility, medium and strong acidity, providing an effective design strategy for high-performance non-noble metal catalysts in SAF production by HDO.
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DOI
高影响因子
CATALYSIS LETTERS
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2023
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IF 2.8
Wang Yanghui,Jin Luyao,Xu Xintao,Li Jiaying,Fan Kaihao,Hu Bo,Shen Yi,Liu Xuesong
In this paper, MnO x /TiO 2 catalysts with different manganese contents were prepared by using vacuum over-impregnation method to support manganese on TiO 2 support. However, the activity temperature window was narrow and the denitrification efficiency was only 265–365 °C in the temperature zone above 80%. Therefore, doping W was used to improve the high temperature activity and broaden the activity temperature window. The experimental results show that the active temperature window of the catalyst is expanded to 260–550 °C when doping 20%WO 3 . The effects of tungsten doping on the structure and surface properties of the catalysts were investigated by XRD, TEM, Raman, XPS, H 2 -TPR and NH 3 -TPD. It is found that the increase of manganese content would increase the ratio of Mn 4+ and O α , and then improve the NH 3 -SCR activity at low temperature. Tungsten doping can provide more strong acid sites and improve the high temperature activity of the catalyst by inhibiting the oxidation of ammonia. Graphical Abstract
研究领域:
催化化学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Haoran Song,Daoyuan Zu,Changping Li,Rui Zhou,Yuwei Wang,Wei Zhang,Shiting Pan,Yang Cai,Zhuo Li,Yongming Shen,Jun Ma
Ultrafast activation of peroxymonosulfate (PMS) by reduction of trace Fe 3+ at the μg L -1 level with the ecofriendly Ti 3 C 2 MXene under neutral and alkaline conditions was achieved for the first time. Complete removal of model pollutant sulfamethoxazole (SMX) was accomplished within about 5 min and 10 min at pH 7.0 and 9.0, respectively. The degradation rate of SMX in Fe 3+ /PMS/MXene process was increased by 72 times compared with that in the absence of Ti 3 C 2 MXene (pH = 7). Methanol/ tert -butanol quenching experiment and electron spin resonance (ESR) measurement demonstrated that hydroxyl radical ( • OH) and sulfate radical (SO 4 •– ) were the primary reactive species. The strong reducibility of Ti 3 C 2 MXene played the key role in triggering the Fe(III)/Fe(II) cycle and accelerating PMS activation. The reducibility of Ti 3 C 2 MXene towards Fe 3+ was measured to be 3.35:1–5.03:1 (mol:mol), far higher than that of hydroxylamine (1:1). Because the confinement effect of MXene inhibited the hydrolysis of iron ions, Fe 3+ /PMS/MXene process exhibited excellent performance even under neutral and alkaline conditions. This study improved the understanding of MXene in Fenton-like reaction and provided an ideal Fenton-like process with ultra-low metal consumption, high efficiency and broad pH range.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
ENERGY & FUELS
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2026
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IF 6
Jiuhong Wei,Yanni Liu,Shihua Zheng,Yajing Cai,Guojie Zhang
Dry reforming of methane (DRM) provides an attractive pathway for the simultaneous utilization of CH4 and CO2 to produce syngas; however, Co-based catalysts typically suffer from metal sintering, formation of hardly reducible cobalt aluminate (CoAl2O4), and severe carbon deposition under high-temperature conditions. Herein, Y-promoted Co catalysts supported on alumina with tailored pore architectures were developed, with particular emphasis on a hierarchical bimodal porous Al2O3 support (Al2O3-BA) integrating ordered mesopores and interconnected macroporous channels. Compared with mesoporous Al2O3-SA and commercial γ-Al2O3-supported counterparts, the 10Co-5Y/A2O3-BA catalyst exhibited smaller Co3O4 crystallites and more uniform nanoparticle dispersion, indicating mitigated agglomeration. H2-TPR analysis revealed enhanced reducibility with a shift of the main reduction peak to lower temperature and a markedly suppressed high-temperature CoAl2O4 feature, suggesting weakened metal–support interaction. CO2-TPD demonstrated an increased population of medium-strength basic sites, favoring CO2 adsorption and activation. XPS indicated a higher Co2+/Co3+ ratio and an increased proportion of surface-adsorbed oxygen species, implying modified surface electronic properties. These structural and surface characteristics translated into superior catalytic performance. The bimodal catalyst delivered the highest CH4 and CO2 conversions over 650–800 °C and maintained stable activity during a 24 h test at 750 °C, achieving 86.5% CH4 conversion, 91.5% CO2 conversion, and an H2/CO ratio of 0.92. Postreaction analyses revealed significantly reduced carbon deposition compared with mesoporous counterparts. Overall, the synergy between Y promotion and hierarchical bimodal porosity effectively modulates metal–support interaction, enhances reducibility and CO2 activation, and suppresses coking, providing a rational strategy for designing durable Co-based catalysts for DRM.
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DOI
高影响因子
INORGANIC CHEMISTRY
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2025
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IF 4.7
Shiju Yang,Xueshuang Yan,Fuzhi He,Zhuliang Chen,Kaizhu Chang,Wan Yang,Futing Xia,Jianjun Chen,Qiulin Zhang
Achieving remarkable activity in selective catalytic reduction of NO by NH3 (NH3-SCR) over CeO2-based catalysts was crucial for their industrial application but still faces a tough challenge, mainly owing to the insufficient acidity and overoxidation ability. Herein, the surface acidity and reducibility of CeO2 catalysts were finely tuned over Mn–W/CeO2 to efficiently eliminate NO and reveal the mechanistic origin of superior catalytic properties. Systematic surface and structure analyses revealed that Mn3O4 interacted with WO3 species in the possible form of Mn–O–W, which could enhance the dispersion of WO3 over the CeO2 surface. The resulting well-dispersed WO3 increased the concentration of both Brønsted acid sites and strong acid sites, effectively suppressing the generation of inactive nitrates and thus providing abundant catalytically active sites for the adsorption and activation of NH3. Importantly, the electron withdrawal from Mn by W atoms associated with the shortened Mn–O bond distance resulted in the appropriate reducibility over Mn–W/CeO2. Accordingly, the undesirable overoxidation of NH3 was weakened, thereby greatly increasing the high-temperature (250–400 °C) NH3-SCR activity. DFT calculations and detailed in situ DRIFTS analysis demonstrated that both “E–R” and “L–H” mechanisms contributed mainly to this superior performance.
研究领域:
催化
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环境化学
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表面科学
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材料科学
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化学反应工程
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）