SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Kuang Wang,Zhanqiang Fang
In this work, a cost-effective ball-milling technique was employed to synthesize submicron oxalated zero-valent iron co-doped with graphite and nickel (G@Fe OX bm /Ni), aiming to enhance the removal efficiency of the recalcitrant pollutant 2, 2′, 4, 4′ – tetrabromodiphenyl ether (BDE-47) while minimizing secondary risks. The incorporation of graphite significantly improved the debromination efficiency of BDE-47, with a rate constant of 0.26 day −1 in a tetrahydrofuran/water system, which represents a 59.88 % increase over the oxalated zerovalent Fe/Ni without graphite (0.16 day −1 ). The determination of Ni leaching showed that no nickel ions were detected post-reaction over a broad pH range (3–11). Moreover, the reactivity of G@Fe OX bm /Ni was largely unaffected across the pH range (0.26–0.49 day −1 ), exhibiting excellent resistance to acidic and alkaline conditions. In both ultrapure water and real groundwater matrices, the degradation rate constants for BDE-47 increased to 2.98 day −1 and 0.79 day −1 , respectively, achieving debromination yields of 97.86 % and 50.18 % for the final product, diphenyl ether. Based on the established degradation pathway and electrochemical analysis, the debromination of BDE-47 follows a catalytic debromination and hydrogenation process by adsorbed atomic hydrogen (H* ADS ). The graphite doping enhanced the debromination of BDE-47 by increasing the production of H* ADS . The adsorption effect of graphite on metal ions effectively controlled secondary pollution and improved the material’s tolerance to acidic and alkaline environments. This work offers an efficient method for the degradation of low brominated diphenyl ether pollutants at a low cost and without secondary risks.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2023
·
IF 5.2
Jian Shi,Ruiqian Li,Jingwei Li,Guicheng Liu
Improving the electrical conductivity and structural integrity of Si/C anodes is of great concern for lithium-ion batteries which can be effectively achieved by doping graphene. However, it is difficult to achieve graphene-doped Si/C composites with good interface contact and conductive architecture. Herein, an in-situ graphene-doped carbon coated silicon nanoparticles (SiNPs) with multilayer architecture is designed. SiNPs is firstly modified and coated by polymethyl methacrylate (PMMA) shell. Multilayer carbon architecture is constructed via co-pyrolysis method using PMMA and citric acid as carbon sources. It displays an excellent lithium storage performance with a reversible discharge capacity of 2117.5 mAhg −1 at 200 mAg −1 . These impressive anodic properties are chiefly benefited from the ingenious carbon architecture coated SiNPs involving in-situ graphene with a strong interfacial bonding interaction. Overall, this investigation can not only broaden the application potential in LIBs for advanced Si/C anodes but also provide an alternative route on designing a graphene-related material.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 18
·6628-6636
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IF 5.7
Yuhao Song,Bingjie Xu,Yingying Deng,Miaosen Yao,Junjie Tong,Qichao Wang,Wanlong Wang,Gentian Yue,Weifeng Zhang,Chen Dong,Furui Tan
Low-cost and stable carbon-based perovskite solar cells (C-PSCs) have been regarded as the most promising device architecture for PSC commercialization. However, due to the large interfacial resistance and energy-level mismatch between the carbon-electrode and perovskite, C-PSCs have suffered from a low fill factor (FF) and an open-circuit voltage (Voc) deficit, limiting their efficiency. Here, a low-temperature, solution-processed P3HT/NiOx organic/inorganic hybrid bilayer, where both elements are doped with graphene (G), is developed as hole-transporting layers (HTLs) for C-PSCs. The optimal G-P3HT/G-NiOx bilayer HTLs not only provide well-matched cascade band alignments that facilitate the charge separation and extraction, and reduce the recombination loss at the perovskite/carbon-electrode interface, but their G co-dopants also build carrier highways within the NiOx and P3HT matrix, accelerating the charge transport and thus reducing FF loss. As a result, a Voc improvement of 100 mV, an FF of up to 79.2%, and a best power conversion efficiency (PCE) of 19.1% for the C-PSCs are achieved. More importantly, the unencapsulated devices with G-P3HT/G-NiOx bilayer HTLs retain 88% of their initial PCE in ambient air for 2500 h; and 91% upon continuous heating at 85 °C for 637 h; and 77% after operation at the maximum power point for over 12000 min. This work provides valuable knowledge for designing bilayer HTLs for highly efficient and stable C-PSCs.
研究领域:
材料科学
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能源技术
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光伏器件
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2022
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IF 7.34
Shihao Wang,Zhuwei Gao,Xinyu Qi,Chengxin Li,Yuxin Xie,Xia Yang,Zhenlong Lin,Zhongxin Liu
In the field of oil-water separation, porous polymers with specific wettability have demonstrated great promise. Herein, we prepared a graphene-doped cellulose acetate porous polymer (graphene/CA) by thermally induced non-solvent induced phase separation (TINIPS) method. Wettability and oil absorption performance of graphene/CA-1.5 were studied with emphasis. The results showed that the water contact angle of graphene/CA-1.5 was 151°, while the oil contact angle was only 0°. As an adsorbent material, graphene/CA-1.5 could adsorb oils and organics such as soybean oil and CCl 4 from water, corresponding to a saturation capacity between 6.71 g/g and 14.72 g/g. Moreover, graphene/CA-1.5 remained stable hydrophobicity and oil absorption performance in environments such as strong acids, strong alkalis and extreme temperatures. Therefore, graphene/CA-1.5 is a potential adsorbent material for the treatment of oil pollution.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）