JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Zhijuan Li,Minghao Hou,Baoye Yao,Chuhan Ma,Shitong Zhang,Honglei An,Yichen Liu,Haibao Duan,Tongfei Li,Yawen Tang
The development of high-entropy alloy (HEA) nanocatalysts with ultrasmall size and hollow structures is vital yet challenging for efficient hydrogen evolution reaction (HER) across all pH conditions. Herein, we present a mild and facile hydrothermal strategy for synthesizing hollow PtRuRhCoCu HEA nanospheres (NSs) via self-assembly of sub-3 nm alloy nanoparticles directed by N , N ′-methylenebisacrylamide (MBAA). The resulting PtRuRhCoCu HEA features a multielement composition, interconnected hollow architecture, and well-dispersed ultrafine particles, providing abundant active sites and strong synergistic electronic interactions. As a result, the PtRuRhCoCu HEA catalyst achieves remarkable HER activity with low overpotentials of 10 mV (1 M KOH), 15 mV (0.5 M H 2 SO 4 ) and 30 mV (1 M phosphate-buffered saline, PBS) at 10 mA cm −2 , outperforming commercial Pt black. Moreover, this catalyst also exhibits outstanding long-term stability across a broad pH range, operating continuously for 80 h under alkaline conditions at various current densities without noticeable degradation. The density functional theory (DFT) calculations confirm that this HEA exhibits optimized hydrogen adsorption energy and electronic structure. When integrated into a full electrolyzer, it delivers a cell voltage of 1.48 V at 10 mA cm −2 , demonstrating great potential for water splitting. This work presents an effective design strategy for next-generation HEA electrocatalysts toward green hydrogen production.
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Xinyu Zheng,Huaili Zheng,Rui Zhao,Zikang Xiong,Yili Wang,Yongjun Sun,Wei Ding
In order to deal with the increasingly serious water pollution caused by dye wastewater, a novel sulfonic acid-modified polyacrylamide magnetic composite (Fe 3 O 4 @SiO 2 /P(AM-AMPS)) was facilely prepared by crosslink reaction. The physicochemical properties and adsorption performances of Fe 3 O 4 @SiO 2 /P(AM-AMPS) were systematically studied by different characterization techniques and a series of batch experiments, respectively. It was found that the adsorption capacities of Fe 3 O 4 @SiO 2 /P(AM-AMPS) towards cationic dyes crystal violet (CV) and methylene blue (MB) were largely enhanced than those of silica-coated Fe 3 O 4 (Fe 3 O 4 @SiO 2 ) and maintained at relatively high levels in a wide pH range, due to the three-dimensional network structure and abundant functional groups of modified polyacrylamide. Besides, owing to the introduction of Fe 3 O 4 @SiO 2 , Fe 3 O 4 @SiO 2 /P(AM-AMPS) presented a unique magnetic property that helped it to be rapidly separated from water in a magnetic field. The maximum adsorption capacities of Fe 3 O 4 @SiO 2 /P(AM-AMPS) were 2106.37 mg g −1 for CV removal and 1462.34 mg g −1 for MB removal at 298.15 K, much higher than those of other reported magnetic composites. Furthermore, Fe 3 O 4 @SiO 2 /P(AM-AMPS) was effectively regenerated with HCl solution and the regeneration rates were higher than 97% and 80% for CV and MB removal after five adsorption-desorption cycles, respectively. With its excellent adsorption capacity, wide pH applicability, high separation speed, and satisfactory regeneration ability, Fe 3 O 4 @SiO 2 /P(AM-AMPS) was expected to become a promising adsorbent in the purification of cationic dye wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Meng Liu,Yu Liu,Qiuyu Chen,Xiaoping Li,Lanxuan Wen,Xiaobao Chen,Dahu Ding,Gen Wang,Yingxin Zhao,Yang Chen,Rongzhi Chen
Inherent defects in carbon material serve as an important way to enhance peroxymonosulfate (PMS) activity, however, the mechanism that activates PMS has always been ambiguous. Herein, the pyrolysis of straw with Prussian blue nanoparticles to prepare CoFe 2 O 4 /C (Carbon) was applied to analyze the mechanism of defective amorphous-C catalyzed activation of PMS. Amorphous-C structural defects increased the specific surface area of CoFe 2 O 4 /C (from 44.19 to 108.73 m 2 /g) with triggered electronic rearrangement, resulting in more PMS adsorption. CoFe 2 O 4 /C ensured the supply of low-valent metals (≡Co 2+ and ≡Fe 2+ ) simultaneously introduced a large number of surface oxygen-containing functional groups, which facilitated free radical generation. The structural defects enhanced electron transfer contributing to the direct oxidative degradation of BPA. Thus, 100 % removal of 450 µM BPA was achieved within 40 min attributed to the combined effect of catalyst-mediated ∙OH, 1 O 2, and electron transfer. Furthermore, the CoFe 2 O 4 /C/PMS system for BPA degradation exhibited universal pH suitability (4 ∼ 10) and low metal leaching (452.10 and 19.53 μg/L for Co and Fe, respectively). This study constructs systematic support for proposing the catalytic mechanism of carbon intrinsic defects activated PMS.
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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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Mengxin Hu,Hao Zhang,Jian Yang,Bin Lu,Haibing Cao,Zhengbai Cheng,Xiaofeng Lyu,Hongbin Liu,Xingye An
Softness is a crucial criterion in assessing the comfort and usability of tissue paper. Flexible fibers contribute to the softness of the tissue paper by allowing the sheets to conform to the contours of the skin without feeling rough or abrasive. This study focuses on developing innovative CGG/APAM/PDA hydrogels with interpenetrating networks consisting of cationic guar gum, anionic polyacrylamide, and polydopamine for cellulase immobilization, aimed at improving bamboo fiber flexibility. Cellulase biomolecules are efficiently immobilized on CGG/APAM/PDA hydrogels through the Schiff base reaction. Immobilized cellulases have a wider pH applicability than free cellulases, good storage stability, and can maintain high relative activity at relatively high temperatures. The treatment of bamboo fibers with immobilized cellulase results in a significant increase in flexibility, reaching 6.90 × 10 14 N·m 2 , which is 7.18 times higher than that of untreated fibers. The immobilization of cellulases using CGG/APAM/PDA hydrogels as carriers results in a substantial enhancement of storage stability, pH applicability, and inter-fiber bonding strength, as well as the capacity to sustain high relative enzymatic activity at elevated temperatures. The immobilization of cellulase within CGG/APAM/PDA interpenetrating network hydrogels presents a viable strategy for enhancing bamboo fiber flexibility, thereby expanding the accessibility of tissue products.
研究领域:
材料科学
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化学工程
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生物技术
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造纸科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ruonan Guo,Zenghui Bi,Beidou Xi,Changsheng Guo,Ningqing Lv,Guangzhi Hu,Jian Xu
Peroxymonosulfate (PMS) based advanced oxidation processes have shown great potential to remove refractory organic pollutants. Developing catalysts that can effectively activate PMS and rapidly degrade pollutant in complex water environment remains a challenge. This study focused on the development of heterogeneous catalyst with high activity comparable to its homogeneous counterpart. The cobalt nanocrystals and single cobalt atom was anchored on porous N–doped graphene fabricating Co–NC and Co SAC , respectively. The PMS activation performance by Co 2+ , Co–NC, and Co SAC was evaluated by nitenpyram (NPR) degradation. Co SAC/PMS was determined as the radical and nonradical hybrid system, exhibiting great interference capability (100 % degradation of nitenpyram within 15 min in tap water, groundwater, river water, and seawater), high stability (maintaining ∼100 % NPR removal efficiency over a 10–hour operation period), and broad pH suitability (effective from pH 3.0 to 11.0). The identification of catalytic site and the oxidation mechanism of NPR were further elucidated through theoretical calculation, revealing the synergistic oxidation of 1 O 2 , • OH, and SO 4 •− for NPR degradation. The content of Co 2+ in the used Co SAC increased while the content of Co 3+ decreased, implying that the role of HSO 5 − acted as electron donors to transfer electrons to Co site, forming 1 O 2 . Results in this study provided practical application of PMS activation based on single–atom catalyst, which outperforms its homogeneous counterpart.
研究领域:
环境科学
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催化
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水处理
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高影响因子
Journal of Water Process Engineering
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2022
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IF 7.34
Ganghong Huang,Zishun Li,Kun Liu,Yingjie Zhang,Xuekun Tang,Qian Peng,Jing Huang,Guofan Zhang
In this work, a bismuth metal-organic framework is used as a modifier to prepare a modified BiOI photocatalytic material (BBI-2), which is then characterized via X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy , N 2 adsorption-desorption isotherm, and X-ray photoelectron spectroscopy. In photocatalytic degradation tests, much higher photocatalytic activity is found for BBI-2 than for pure BiOI. After 75 min of visible-light irradiation, the degradation ratio of 10 mg/L rhodamine B by 100 mg/L BBI-2 can reach 97.14%. In addition, BBI-2 shows good performance in terms of pH applicability and circulation. Photoelectric analysis, free-radical analysis, and energy band analysis make clear that the improvement in the visible-light photocatalytic performance of BBI-2 is mainly due to the optimization of its morphology, size, specific surface area, energy band position, and the transmission and separation properties of photogenerated carriers. The active substances that play a significant role in the photocatalytic system are also determined. A study of biological effects finds that BBI-2 shows distinct photocatalytic antibacterial activity under visible-light irradiation, low cytotoxicity to human primary fibroblasts, and good compatibility with defibrinated rabbit blood.
研究领域:
材料科学
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环境科学
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化学
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生物技术
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DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2023
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IF 1.2
Yuan-Yuan LI,Yong-Li WU,Na CHEN,Yu-Long MA,Wen-Xin JI,Yong-Gang SUN
In this study, metal composite oxides grown on nickel foam were prepared, which were modified by dopamine and biochar to obtain cauliflower-shaped Co 2 MnO 4 /NF@PDA/BC adsorption material to adsorb cationic dyes from aqueous solutions. The maximum adsorption amounts q max for methylene blue (MB), malachite green (MG), and crystal violet (CV) were 8.44, 41.03 and 3.39 mg g − 1 , and the adsorption aligned with the Langmuir isothermal model as single molecular layer adsorption on a homogeneous surface. The adsorption experiments of dyes were conducted using lake water in the environment, and the adsorption rates of MB, MG, and CV were 91.4%, 94.8% and 85.1%, respectively. Meanwhile, the material has wide pH applicability (3–9), and good adsorption-desorption cycle performance. In addition, the synthesized adsorbent Co 2 MnO 4 /NF@PDA/BC and the control adsorbent were investigated and shown to have good adsorption capacity. In conclusion, the adsorbent materials synthesized in this work have some application prospects in dye wastewater adsorption.
研究领域:
环境科学
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材料科学
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水处理
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DOI
高影响因子
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