Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Di Liu,Yan Wang,Xue He,Shasha Liu,Wei Kong,Hui Zhang,Qiyao Chen,Zhenxia Song,Hai Tang
Ultrafiltration is widely employed for the advanced treatment of real textile wastewater; however, it encounters significant challenges of low separation efficiency and severe membrane fouling caused by residual organic matter (DOM) present in the conventionally treated biodegradable effluent. This study developed a blending membrane by incorporating cobalt-carbon (Co-C) nanocomposites, derived from ZIF-67, with polyvinylidene fluoride (PVDF) for synergistic filtration and peroxymonosulfate (PMS)-activated radical oxidation of real textile wastewater. The results indicate that an efficient removal of 62.9 % of total organic carbon-based DOM was achieved through online filtration-oxidation at a PMS concentration of 0.5 g/L, which is 3.7 times greater than the performance of pristine PVDF filtration. Furthermore, the system exhibited exceptional antifouling properties, evidenced by a flux recovery rate (FRR) of 71.2 % and a reduction in irreversible fouling ratio (R ir =22.7 %), attributed to the in-situ oxidative degradation of foulants. Molecular-level analysis using three-dimensional fluorescence excitation-emission matrix and fourier transform ion cyclotron resonance mass spectrometry revealed that SO 4 •− /•OH radicals preferentially degraded aromatic DOM components. The membrane’s surface roughness reduction and loose foulant layer formation further alleviated fouling. This work provides a preliminary data for textile wastewater remediation and deepens the mechanistic understanding of catalytic membrane processes.
研究领域:
环境科学
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膜分离技术
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高级氧化过程
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水处理工程
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材料科学
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污染物降解机制
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Quanhui Hou,Jinhui Wang,Yang Zhou,Peng Jiang,Yuting Li,Zhao Ding,Qianyang Wang,Yonglian Xiong
Developing sustainable catalysts for magnesium-based hydrogen storage systems is crucial for advancing clean energy technologies. Here, we report a facile synthesis strategy for Co/C nanocomposites using renewable sugarcane bagasse as a carbon precursor, achieving uniform dispersion of Co nanoparticles (<200 nm) within a hierarchically porous carbon matrix. The optimized MgH 2 +10 wt% Co/C composite exhibits dramatically enhanced hydrogen storage performance, with a reduction in dehydrogenation onset temperature from 330.4 °C to 209.4 °C and a 26 % decrease in apparent activation energy. The composite achieves rapid hydrogen uptake (6.2 wt% within 10 min at 150 °C) and excellent cycling stability (6.28 wt% after 10 cycles at 300 °C). Mechanistic studies reveal that the superior performance originates from the synergistic effects between the in-situ formed CoMg 2 /CoMg 2 H 5 phases acting as "hydrogen pumps" and the porous carbon framework providing efficient pathways for mass/heat transfer. This work not only demonstrates an effective approach for developing high-performance hydrogen storage materials from renewable resources but also provides fundamental insights into the rational design of sustainable energy materials.
研究领域:
材料科学
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能源科学
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可持续发展
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DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2020
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IF 3.475
Yongxing Li,Pengqian Luan,Liya Zhou,Saiguang Xue,Yihang Liu,Yunting Liu,Yanjun Jiang,Jing Gao
The synthesis or decomposition of complex substances through the combination of metals and enzymes is desirable but still a huge challenge. A kind of yolk-shell structured Co/C@SiO 2 @Ni/C nanocomposites were prepared by the polyhedral ZIF-67@SiO 2 composite as a precursor through the extended stöber method and subsequent carbonization treatment. The SiO 2 as an intermediate protective layer stabilized the morphology and structure of the carbonized products. The metallic nickel nanoparticles were uniformly distributed on the surface of Co/C@SiO 2 @Ni/C for highly specific absorption of His-tagged organophosphohydrolase (OpdA) from cell lysates via affinity, and therefore an integrated nanocatalyst (INC) named OpdA@Co/C@SiO 2 @Ni/C was successfully prepared. The prepared INC was applied to achieve a one-pot chemoenzymatic cascade degradation of organophosphates (OPs) to p -aminophenol (PAP) within 30 min. In addition, the INC proved to be a simple and high-sensitivity nanocatalyst for the detection of methyl-parathion with a low limit of detection (0.30 μM). The INC exhibited improved pH stability, thermal stability, SDS resistance, and storage stability compared to that of free enzymes. When OpdA@Co/C@SiO 2 @Ni/C was reused for 7 cycles, the cascade degradation efficiency of methyl-parathion could retain more than 60 %. This study provides a strategy for constructing a multifunctional nanocatalyst, and further demonstrated its potential in biocatalysis, accurate detection of OPs and remediation of environmental pollution.
研究领域:
生物化学
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环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF CATALYSIS
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2017
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IF 6.844
Huifang Liu,Min Wang,Hongji Li,Nengchao Luo,Shutao Xu,Feng Wang
Catalytic oxidation of C C bond is a key technology to transform petroleum-based as well as sustainable biomass feedstock into more valuable oxygenates. We herein describe a convenient and useful oxidation strategy of converting ketones into carboxylic acids using homogeneous copper catalyst without additives and with O 2 as the terminal oxidant. A wide range of aryl and aliphatic ketones as well as β–O–4 lignin models were selectively oxidized to acids via C C bond cleavage. Mechanism studies by EPR and in situ NMR elucidate the principles of Cu/O 2 reactivity that involves C H bond and O 2 activation via a peroxide species. This provides an important foundation for expanding the scope of useful aerobic oxidation reactions using copper catalysts.
研究领域:
有机化学
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催化化学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2021
·Vol. 168
·期 8
·087501
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IF 4.316
Shiying Zhou,Peng Zhao,Jilin Zheng,Sha Chen,Mei Yang,Danqun Huo,Changjun Hou
Flexible electrodes play an increasingly important role in the development of portable and wearable electronics. Herein, a novel flexible and self-supporting electrode supported on active electrocatalyst (Au/Fe–Co@C–Nx/GO/CC) has been prepared for in situ detection of extracellular H2O2. The Fe, N co-doping of Fe–Co@C–Nx with abundant active sites promotes electron transfer efficiency, and Fe–Co@C–Nx nano-arrays with a unique spatial structure are beneficial for the deposition of Au nanoparticles (AuNPs). Graphene oxide (GO) serves as a chemical bridge to ensure that the nanomaterials grow more uniformly and firmly on the carbon cloth. Meanwhile, the flexible carbon cloth possesses stable mechanical and electrochemical properties. Based on these unique superiorities, this flexible electrode exhibits excellent sensing performance toward H2O2 with high selectivity and sensitivity, low LOD (0.56 μM), and wide linear range (from 5 to 21195 μM). Most importantly, the prepared electrode can adhere to cells for in situ and sensitive determination of H2O2 released from cells. Compared to detecting H2O2 in cell suspensions, in situ detection can capture the signal molecules more sensitively and effectively, avoiding the diffusion of H2O2 from the solution to the electrode surface. This flexible electrode has great potential in development of molecular detection and portable electronics.
研究领域:
材料科学
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电化学
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生物传感器
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可穿戴电子
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DOI
高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
Guotong Chen,Fang Mi,Shan Zhang,Xuehui Rao,Jian Sun,Zhong Yang,Ming Guan
This study reports the design and fabrication of a magnetic nanoporous carbon-based recyclable surface-enhanced Raman scattering (SERS) substrate Co/C@Ag/g-C 3 N 4 , which can simultaneously achieve SERS detection and visible-light photocatalytic degradation of malachite green (MG). Co/C and g-C 3 N 4 can spontaneously adsorb and concentrate MG near plasmonic nanoparticles, thereby enhancing the SERS response. The substrate exhibited a SERS enhancement factor of approximately 1.3 × 10 6 . The limit of detection (LOD) for MG in aquaculture water, prawn, and tilapia was 8.2 × 10 −11 M, 0.08 μg/kg, and 0.06 μg/kg, respectively. The substrate can be magnetically collected from the complex matrix and regenerated through photocatalytic degradation. Eliminates the co-centrifugation of the SERS substrate with the complex matrix. Even after 4 regeneration cycles, the substrate retained nearly 80 % of its original SERS intensity. This study presents a novel strategy for constructing self-enriched, self-cleaning, and recyclable substrates with promising applications in food safety and environmental protection.
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产品关联
DOI
PubMed
高影响因子
CARBON
·
2024
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IF 10.5
Gaofeng Shao,Liqun Guo,Rupan Xu,Yifan Wu,Xiaogu Huang
The advancement in the miniaturization of carbon aerogels into micro-sized spheres represents a significant development in the creation of ultralight, broadband microwave absorbers. Notwithstanding this innovation, there is still a considerable challenge in optimizing microwave absorption (MA) performance through heterointerface engineering within aerogel microspheres . Herein, we have developed skin-core heterogeneous aerogel microspheres by the in situ generation of ZIF-67 nanocrystals on the wet-spun aramid nanofiber (ANF) aerogel microspheres, followed by a high-temperature carbonization process. The resulting Co@C nanoparticle-enshrouded ANF-derived carbon nanofiber aerogel microspheres (Co@C/CNFAMs) demonstrate an exceptional equilibrium between impedance matching and multi-faceted attenuation. Remarkably, the Co@C/CNFAM2 sample attains a maximum effective absorption bandwidth of 8.72 GHz, while maintaining an ultralow filler proportion of 1.5 wt%. Moreover, the Co@C/CNFAM3 sample achieves a minimum reflection loss of −72.34 dB with a filling ratio of 1.2 wt%. Our findings offer a refined approach to the intricate engineering of heterostructures , along with the strategic macrostructural design, paving the way for the development of aerogel-based microwave absorbers that represent the next step in material science innovation.
研究领域:
材料科学
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纳米技术
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电磁材料
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复合材料
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
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IF 7.312
Shengnan Li,Jiwei Jiang,Shih-Hsin Ho,Fengxiang Li,Wenlu Zeng
Microbial fuel cells (MFCs) systems are up-and-coming technologies for renewable energy production and wastewater treatment simultaneously. However, the inactive oxygen reduction reaction (ORR) on the cathode markedly limits the functioning of MFCs. Therefore, the cathodic catalyst is one of the crucial components in MFCs, this paper presents the removal of the antibiotic sulfamethoxazole (SMX) from water using single-chamber MFCs with Fe-Co-C/N as electrocatalysis. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were conducted to illustrate the structure and elemental composition of Fe-Co-C/N. The results obtained by the rotating disk electrode (RDE) method showed an extraordinary electrocatalytic activity of Fe-Co-C/N towards ORR in O 2 -saturated 0.1 M KOH. Furthermore, the degradation of SMX by MFCs that applied modified electrodes was also studied. The results demonstrated that using Fe-Co-C/N as air–cathode catalysts exhibited the degradation efficiency of 61.64% towards 6 mg/L SMX with 48 h. In addition, cyclic voltammetry (CV) analysis showed that the peak current of the biofilm in the PBS solution (without adding SMX) was significantly higher than that of the solution with SMX addition at 6, 18, and 30 mg/L. Moreover, MFC performance was also evaluated by measuring electrochemical impedance spectroscopy (EIS), power generation, and polarization curves. Last but not least, the high-throughput sequencing-based metagenomic technique was used to explore the microbial community diversity, functional genes in MFCs, and fate of ARGs. SMX addition raised the abundances of sul1 and sul2 as resistance genes, which enhanced microbial resistance, the coping capability of SMX toxicity, and the adjustment of the damage from SMX. The obtained results suggest that Fe-Co-C/N is a feasible catalyst for MFC cathodes owing to its satisfactory performance in terms of SMX wastewater treatment and power production.
研究领域:
环境科学
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电化学
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废水处理
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微生物学
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催化
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）