JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yunpeng Wang,Liancen Li,Hui Yu,Zehan Xie,Rongcheng Mo,Minsheng Lu,Changzhou Chen,Douyong Min,Jinli Chen,Guangfu Qian
Developing highly active lignin carbon-based electrocatalysts for urea electrolysis is critical but remains a considerable challenge. Herein, a self-supported lignin-derived carbon coupling with Mo-doped NiO and NiCo alloy heterojunction (Mo-NiO@NiCo/C) has suitable lattice tensile strain and rapid electron transfer , thereby achieving high catalytic performance for urea electrolysis under large current density . The operando electrochemical impedance results demonstrate that Mo-NiO@NiCo/C undergoes an indirect oxidation step during the urea oxidation reaction (UOR) and follows the Volmer-Heyrovsky mechanism during the hydrogen evolution reaction (HER). Consequently, among all prepared catalysts, Mo-NiO@NiCo/C exhibits the best UOR ( E 10/500/1000 = 1.278/1.381/1.430 V) and HER ( E −10/−500/−1000 = −38/−262/−353 mV) activity in 1.0 M KOH with 0.5 M urea solution. In a UOR//HER electrolysis cell, Mo-NiO@NiCo/C can obtain the potential of 1.313 and 1.607 V at 10 and 1000 mA cm −2 . Meanwhile, benefiting from the self-supported lignin-derived mesoporous carbon structure , it can operate stably for 100 h at 1000 mA cm −2 . This work presents an efficient lignin-derived carbon-based catalyst for urea electrolysis under ampere-level current density and details a practicable method for improving the utilization rate of lignin-derived carbon.
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DOI
PubMed
高影响因子
Water
·
2026
·Vol. 18
·期 6
·
IF 3.5
Haiquan Zhan,Hong Wang,Yanzeng Li,Shiyu Liu,Shijie Yuan,Xiaohu Dai
Photosynthetic algae–microbial fuel cells (PAMFCs) are attractive for energy-positive wastewater treatment and carbon mitigation. However, PAMFC performance under continuous flow is often constrained by limited cathodic electron-acceptor supply and unstable photosynthetic biofilms, while the extent to which cathode interfacial engineering can stabilize diurnal power output and assimilative NH4+–N removal remains unclear. In this study, the sponge-like and petal-like ZnO0.2-NiO@rGO-modified carbon fibers (ZnO0.2-NiO@rGO-pCFs and ZnO0.2-NiO@rGO-pCFp) and pre-fabricated carbon felt (pCF) were used as cathode materials to construct three sets of PAMFC systems. Under light–dark cycling, the engineered cathodes reached steady operation within about 6.5 d and increased the steady-state voltage to approximately 0.35 V, compared with approximately 0.08 V for pCF. Under continuous-flow conditions, cathodic NH4+–N removal exhibited a stable diurnal rhythm, with higher removal during illumination at about 43–51% than in the dark at about 29–30%, consistent with algal assimilation as the primary nitrogen sink, while cathode modification mainly improved the cathodic microenvironment and response stability. Compared with pCF, the ZnO0.2–NiO@rGO cathode enriched a more even, Chlorophyta-dominated algal biofilm with an approximate relative abundance of 80%, indicating that its selective interfacial environment favors biofilm stabilization and sustains in situ oxygen production and cathodic electron-acceptor supply. Consequently, the composite cathode enhanced voltage output and stabilized light-enhanced, assimilative NH4+–N removal under aeration-free operation, while establishing an interpretable link between electrochemical performance and 18S rDNA-derived community assembly features, thereby providing a low-cost cathode design basis for nitrogen removal in wastewater treatment.
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Yitong Lin,Taiyu Jin,Yu Liu,Jianhe Tang,Ying Tian,Xueke Liu,Liang Chen,Dawei Fang,Jun Wang
A coated Z-scheme NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ @CdS-Pd@NiO photocatalyst with core-shell structure is prepared by hydrothermal and coprecipitation methods. NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ as excellent up-conversion luminescent material can convert infrared light into visible light, broadening the light response range of CdS. Pd nanorods act as conductive channels and co-catalysts, leading to successful construction of titled photocatalyst, increasing contact area between two monomer photocatalysts, promoting transfer of photo-generated electrons. It also provides a large oxidation surface for organic pollutant degradation. The performance of prepared photocatalyst is assessed by Congo red degradation and hydrogen production . The emission spectrum and energy conversion mechanism of NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ are investigated. The photocatalyst with 3:1 NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ @CdS-Pd and NiO mass ratio has a preeminent activity. Congo red degradation ratio and hydrogen production amount reach 92.48% and 653.06 µmol/g, respectively, under simulated sunlight irradiation for 180 min. The possible mechanism of organic pollutant degradation with synchronous hydrogen production caused by titled photocatalyst is proposed.
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DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2014
·Vol. 12
·期 4
·823-829
·
IF 1.215
Rujie He,Daining Fang,Feng He,Yefan Wu
The influences of graphite particle size and HNO 3 treatment on microstructure and cell performance of the NiO–YSZ anode-supported solid oxide fuel cells were investigated. The peak power density for the cells using 1, 3, and 6 μm graphite was 679, 603, and 549 mW/cm 2 , respectively. HNO 3 treatment was an efficient approach to improve the wettability of graphite in water, to modify the microstructure and to enhance the cell performance. The peak power density for the cell using HNO 3 -treated graphite (1 μm) was 766 mW/cm 2 , approximately 13% higher than that of the cell using pristine graphite.
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DOI
高影响因子
ANALYTICAL LETTERS
·
2023
·
IF 2
Zheqi Fei,Baisen Chen,Xuemei Wei,Lili Lian,Xiyue Wang,Dawei Lou
Developing highly efficient adsorbents toward trace pollutant analysis in complex biological samples is a challenge in analytical chemistry. Herein, NiO/ZnO-coated carbon microspheres (denoted by NiO/ZnO@C) with a well-defined core–shell structure were prepared through hydrothermal treatment and subsequent pyrolysis in air to enrich malachite green (MG) and crystal violet (CV). Hydrophilic carbon microspheres played an important role in the formation of core–shell NiO/ZnO@C, which may lead to the deposition of Ni2+/Zn2+ upon the surface via acidic chelating ligands. Based on the Langmuir model, NiO/ZnO@C demonstrated high adsorption capacities of 333.3 and 192.3 mg/g for MG and CV, respectively. Moreover, the NiO/ZnO@C composite served as a dispersive solid-phase extraction adsorbent to determine MG and CV in aquatic products combined with ultra-high performance liquid chromatography. High linearity was obtained for analyte concentrations from 5 to 500 μg/L with correlation coefficients (r) exceeding 0.9991. The limits of detection of the method were 0.50 μg/L (MG) and 0.35 μg/L (CV) with relative standard deviations less than 7.47%. Furthermore, the developed method was employed to determine MG and CV in aquatic products.
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高影响因子
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