LANGMUIR
·
2025
·
IF 3.9
Zixu Ren,Yu Yu,Dingyang Chen,Minsi Shi,Rui Zhao
Polyamidoxime fibers have been widely studied for uranium extraction from seawater, but improving the amidoxime (AO) group utilization and increasing the selectivity toward uranium remain challenging. Herein, a hyperbranched macromolecular cross-linking strategy was employed to construct hyperbranched polyethylenimine (PEI) among the molecular chains of polyamidoxime nanofibers (PAN/PEI-AO nanofibers). This approach simultaneously suppressed chain entanglement and effectively reduced hydrogen bond formation between amidoxime groups, thereby significantly enhancing the utilization efficiency of AO groups. Moreover, the PEI structure also facilitated the dissociation of CO32– from uranyl tricarbonate ([UO2(CO3)3]4–) and comprised amino groups as assistant groups for enhanced uranium uptake. The above cross-linking effect by PEI was confirmed by experimental data and theoretical calculation, resulting in high uranium uptake (474.8 mg g–1) alongside good deep removal capability (kd = 7.7 × 105 mL g–1) from [UO2(CO3)3]4– solution. Moreover, PAN/PEI-AO nanofibers also exhibited good selectivity and reusability toward uranium and showed a uranium extraction capacity of 8.24 mg g–1 after 20 days’ testing from natural seawater. The obtained adsorption performance of PAN/PEI-AO nanofibers exceeded traditional polyamidoxime nanofibers and many reported uranium adsorbents. Overall, this work offers a strategy to improve the performance of polyamidoxime fibers, which possess the potential to extract real uranium species from natural seawater.
研究领域:
材料科学
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环境化学
·
核能
·
高分子化学
·
水处理
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 16
·3846
·
IF 4.2
Lei Huang,Jian Qian,Shijian Sun,Zheng Li,Dechuan Li
A novel method for synthesizing dumbbell-shaped (Gd1−xTbx)2O(CO3)2·H2O (GOC:xTb3+) phosphors using sodium carbonate was investigated. An amount of 1 mmol of stable fluorescent powder can be widely prepared using 3–11 mmol of Na2CO3at a pH value of 8.5–10.5 in the reaction solution. The optimal reaction conditions for the phosphors were determined to be 7 mmol for the amount of sodium carbonate and a pH of 9.5 in the solution. Mapping analysis of the elements confirmed uniform distribution of Gd3+and Tb3+elements in GOC:xTb3+. The analysis of fluorescence intensity shows that an optimal excitation wavelength of 273 nm is observed when the concentration of Tb3+is between 0.005 and 0.3. The highest emission intensity was observed for GOC:0.05Tb3+with a 57.5% maximum quantum efficiency. The chromaticity coordinates show that the color of GOC:Tb3+is stable and suitable for fluorescence recognition. Latent fingerprint visualization reveals distinctive features like whorls, hooks, and bifurcations. Therefore, the sodium carbonate method offers an effective alternative to traditional urea chemical reaction conditions for preparing GOC:Tb3+.
研究领域:
材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 8
·期 1
·369-379
·
IF 10.733
Chun Li,Lingling Shi,Lili Zhang,Peng Chen,Junwu Zhu,Xin Wang,Yongsheng Fu
Organic two-dimensional (2D) materials with unique optic-electronic properties are attracting great interest for application in functional electronic devices. However, low electronic conductivity and poor stability still are major defects of 2D organic systems. Herein, we demonstrated ultrathin 2D conductive cobalt–hexaaminobenzene metal–organic coordination polymer nanosheets (Co–HAB-NSs) with a thickness of ∼4.5 nm. The as-prepared Co–HAB-NSs exhibit a low overpotential (310 mV @ 10 mA cm−2) and high durability in 1 M KOH. The experimental and computational results show that the high electrocatalytic activity is ascribed to the enhanced electrochemically active surface area as well as the dense and stable catalytic active sites of Co–HAB-NSs.
研究领域:
材料科学
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电化学
·
纳米技术
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产品关联
DOI
高影响因子
ChemCatChem
·
2025
·Vol. 17
·期 6
·e202401780
·
IF 3.9
Jingru Li,Siyuan Hu,Longmei Shang,Guowu Zhan
Graphical This study investigates N -doped Co 3 O 4 /Pt catalysts synthesized using a Pt-decorated ZIF-67 sacrificial template, followed by a water-soaking treatment to enhance surface hydroxyl (-OH) group content. The interfacial N -stabilized Co 3+ -OH-Pt active sites in N -Co 3 O 4 /Pt improved synergy between cobalt and platinum, enhancing agglomeration resistance and enhancing catalytic performance. CO 2 hydrogenation is a promising method for converting CO 2 into valuable products. Cobalt-based catalysts are favored for their low cost and high activity, but they face challenges from sintering-induced deactivation. This study investigates N -doped Co 3 O 4 /Pt catalysts synthesized using a Pt-decorated ZIF-67 sacrificial template, followed by a water-soaking treatment to enhance surface hydroxyl (─OH) group content. The as-designed N -Co 3 O 4 /Pt catalyst achieved a CO 2 conversion of 64% and CH 4 selectivity of 98% at 340 °C under ambient pressure. It was demonstrated that the interfacial N -stabilized Co 3+ -OH-Pt active sites in N -Co 3 O 4 /Pt improved synergy between cobalt and platinum, enhancing agglomeration resistance and enhancing catalytic performance. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) demonstrated that CO 2 is converted to methane mainly through a formic acid pathway, with no CO detected. This work underscores the critical role of surface hydroxyl groups in promoting CO 2 adsorption and activation, guiding the CO 2 methanation reaction toward efficient methane production.
研究领域:
催化化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 6
·060538
·
IF 4.386
Jie Hu,Fei Yang,Changgan Lai,Helin Wang,Liu Nie,Jian Sun,Huan Zhou,Lixu Lei
Pb3(OH)2(CO3)2-acetylene black (BLC/AB) composite is successfully prepared by a simple and economical sonochemical method and employed as a negative additive for lead-acid batteries (LABs). The electrochemical measurements show that the obtained BLC/AB electrodes have a higher hydrogen evolution reaction (HER) overpotential compared to AB electrode. BLC/AB-2 and BLC/AB-4 battery deliver the excellent rate performance at 1C rate. What's more, acetylene black as nucleation centers of Pb3(OH)2(CO3)2 may considerably alleviate irreversible sulfation phenomenon of negative plate, thus enhancing the conductivity and extending the cycle life. Interestingly, the cycle life (1172) of BLC/AB-2 battery is 1.44 times that of the same amount of AB battery (814) at 1C rate. Therefore, the BLC/AB composite is a promising negative additive of LABs.
研究领域:
材料科学
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电化学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 37
·30817-30828
·
IF 4.6
Hui Fui,Xinran Ma,Yiping Huang,Shiyao Xi,Zhandong Ren,Yuchan Zhu
AS a low-cost and high-performance catalyst, spinel cobalt oxide (Co3O4) has two different catalytic active sites (tetrahedral Co2+ and octahedral Co3+) to drive the activation of peroxymonosulfate (PMS) through Co2+/Co3+ redox cycle. Tuning Co2+/Co3+ atomic ratio on the surface of Co3O4 for the construction of a synergy in the Co2+/Co3+ redox cycle might be an effective way to further boost PMS activation performance of Co3O4 catalyst. Herein, we suggested a metal-doping strategy to regulate Co2+/Co3+ atomic ratio of Co3O4 by partially substituting Co2+ with inert Mg2+ and formed a series of Mg doped Co3O4 (MCO) catalysts. Structural characterizations and experimental investigations demonstrated that Mg doping did not change Co3O4 host lattice and particle morphology, but could manipulate surface Co2+/Co3+ atomic ratio of Co3O4 for an improved PMS activation. The optimal MCO catalysts (MCO-0.2) with the suitable Co2+/Co3+ atomic ratios (1.13) exhibited the excellent thiacloprid (THIA) degradation performance through PMS activation, and the apparent degradation rate constant (0.2835 min−1) was highly outperformed that of pure Co3O4 (0.09555 min−1) and other similar cobalt-based catalysts. The optimal THIA degradation conditions might be: catalyst dose 100 mg L−1, PMS concentration 0.8 mM, pH 7 and THIA concentration 20 mg L−1. Quenching experiments and electron paramagnetic resonance (EPR) characterizations suggested SO4˙−, HO˙ and 1O2 were all involved in THIA degradation during the MCO-0.2/PMS process. Furthermore, the steady-state concentrations of these reactive species and their relative contributions to THIA degradation were also calculated by combining a kinetic model and a series of probe compound-based experiments. The results indicated that SO4˙− and HO˙ were generated at lower steady-state concentrations than that of 1O2, but they dominated THIA abatement during the MCO-0.2/PMS process. This study presented new insights into the construction of efficient PMS activator and a mechanistic understanding for PMS-mediated reaction.
研究领域:
环境化学
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催化
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材料科学
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水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Yifei Huang,Hongliang Dai,Hongye Bai,Weiqiang Fan
Biomass materials as an abundant renewable resource could replace traditional fossil fuels and non-renewable materials, providing a new solution to achieve sustainable development. In this paper, Ce-modified Co(OH) 2 /Cu 2 O composite catalysts were prepared by an electrodeposition method, and the CoOOH/CuOOH dual active sites were successfully obtained through an electrochemical reconfiguration strategy, and the experimental results showed that the incorporation of Ce induced the formation of high-valent Co and Cu species, which improved the activity of electrocatalytic HMF oxidation. At 0.55 V vs Hg/HgO, the HMF conversion reached 100%, the FDCA yield was 95.04% and the Faraday efficiency was up to 98.47%. These results confirm the effectiveness of Ce-based non-precious metal catalysts in electrochemical reconstruction strategies and demonstrate their potential application in the high-value conversion of biomass derivatives. This finding not only provides a solid research basis for the development of highly efficient catalysts, but is also expected to promote the development of related technological fields.
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 26
·12091-12102
·
IF 3.553
Sheng Peng,Tao Shi,Gao Xiaorui,Tan Yongjian,Wu Dajun,Qian Bin,Chu Paul K.
Cobalt carbonate hydroxide possesses interesting capacitive properties due to the unique crystal structure. Herein, the hierarchical Co 3 O 4 @Co 2 (CO 3 )(OH) 2 dendritic structure was fabricated on carbon cloth with Co 3 O 4 nanoneedles as the inner core to enhance the conductivity. The loading efficiency of Co 2 (CO 3 )(OH) 2 nanowhiskers had improved obviously, and the nanowires provided more electrochemical sites to facilitate the superior electrochemical energy storage capacity of supercapacitor. The dendritic electrode with the core–shell structure had a high area-specific capacitance (1541 mF cm −2 at 1 mA cm −2 ), good rate capacitance (only 18.1% specific capacitance lost when the current density increased to 5 mA cm −2 ), as well as better electrochemical cycle stability (a capacitance retention of 72.1% after 5000 cycles at a high current density of 5 mA cm −2 ). The dendritic Co 3 O 4 @Co 2 (CO 3 )(OH) 2 and activated carbon as cathode and anode, respectively, were used to assemble an asymmetric supercapacitor, possessing the better area-specific capacitance of 87 mF cm −2 as well as well-deserved longevity retaining approximately 97.3% of initial capacitance even after 10,000 cycles at 1 mA cm −2 . The excellent properties stemmed from electro-active sites galore, strong adhesion between the core and shell, superior conductivity, as well as excellent ion transfer. The novel materials and feasible strategy are promising for next-generation hybrid supercapacitor with high performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 7
·3078-3082
·
IF 6.233
Jinhui Hao,Wenshu Yang,Zhe Zhang,Shunhao Pan,Baoping Lu,Xi Ke,Bailin Zhang,Jilin Tang
A facile method is proposed for the synthesis of three-dimensional (3D) flower-like Co3−xFexO4 ferrite (CF) hollow spheres, using SiO2@FeOOH as precursor. The CF hollow spheres are efficient for the catalytic degradation of methylene blue (MB) in the presence of H2O2 at 80 °C. The obtained CF hollow spheres were characterized using transmission electron microscopy, field emission scanning electron microscopy, X-ray diffraction, X-ray photo-electron spectroscopy, and N2 adsorption–desorption isotherm measurements. The formation of 3D hierarchical flower-like superstructure was influenced by the relative amount of urea used. As the mole ratio of CoCl2 and urea decreased, the structure of the products was tailored from yolk-like spheres to hollow spheres with different sized void interiors. Moreover, N2 adsorption–desorption isotherm analysis showed that the CF hollow spheres have a large specific surface area (163 m2 g−1) which provided more activity sites. The CF hollow spheres can catalyze the oxidation of MB efficiently. These results indicate that the designed CF hollow spheres exhibit promising capability for the degradation of dyes.
研究领域:
材料科学
·
环境催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Min-Ping Zhu,Jia-Cheng E. Yang,Xiaoguang Duan,Shaobin Wang,Darren Delai Sun,Baoling Yuan,Ming-Lai Fu
Immobilizing metal-organic frameworks in macro-supports to form three-dimensional catalysts holds a great promise in environmental remediation, however quantitative structure/property-catalytic activity relationship remains unknown currently. In this work, we constructed Co 2 AlO 4 /CoAl 2 O 4 @Al 2 O 3 monoliths derived from ZIF-67@γ-Al 2 O 3 pellets and systematically investigated their surface chemistry-activity relationships in peroxymonosulfate (PMS) activation for organic degradation. The activities of Co 2 AlO 4 /CoAl 2 O 4 @Al 2 O 3 catalysts were selectively correlated with their ratios of Co 3+ /Co 2+ and O Defect /O Lattice . The optimized Co 2 AlO 4 /CoAl 2 O 4 @Al 2 O 3 demonstrated an excellent catalytic efficacy toward PMS activation for metronidazole removal in a wide pH range (3.29–10.26) and OH was the dominant oxidant for metronidazole oxidation. The catalyst also exhibited desirable performance for eliminating other emerging contaminants and enduring catalytic activity and stability in PMS activation without regeneration. This study provides new prospects in rational design of robust, cost-effective and self-cleaning/repairing three-dimensional Co-based macroscale-catalysts with an outstanding and lasting catalytic activity for water purification.
研究领域:
环境科学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Ke Qian,Xiaodong Liang,Qin Liu,Jingying Li,Yi Gan,Jia Yao,Junjie Zheng,Ziang Wu,Yin Yang,Xingtai Liu,Xiang Liu,Lin Lv,Hanbin Wang,Jun Zhang,Houzhao Wan,Hao Wang
Alkaline zinc-based batteries have become a current research hotspot due to their high energy density and safety, but their low cycle stability and rate performance limit their commercial applications. Herein, vertically ordered NiCo 2 S x nanoneedle arrays are prepared using different sulfidation concentrations based on the anion exchange reaction. The highly uniform nanoneedle arrays provide fast ion transport paths and abundant active sites, and the prepared NiCo 2 S x @Ni foam (NiCo 2 S x @NF) electrode has the excellent capacity (121.9 mAh g −1 ), stable cycle performance (91.1 % of capacity retention after 500 cycles), also achieves a maximum energy density of 636.3 Wh kg −1 and a maximum power density of 40.9 kW kg −1 . This paper provides a more precise and accurate idea for preparing cathode materials for durable alkaline Ni–Zn batteries .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Tianbiao Zeng,Jie Lin,Biao Wang,Binbin Guo,Yihong Ding,Chang Q. Sun
In an era where clean energy and sustainability are prioritized, water electrolysis for hydrogen production has become a focus of research. Ti-6Al-4 V alloy (Ti64) may support the catalyst due to its high mechanical strength, electrical conductivity, and resistance to alkali corrosion. However, its poor catalyst adhesion limits its application. Herein, a carbon layer was deposited on Ti64 (Ti64/C), before depositing the Co0.8Ni0.2(CO3)0.5(OH)·0.11H2O (CNCH) nanoneedles. The porous Ti64-H/C/CNCH electrode performs exceptionally well in the oxygen evolution reaction, achieving a current of 10 mA cm–2 at an overpotential of 131 mV with 90% IR compensation. Furthermore, the cell achieves a density of 10 mA cm–2 at 1.83 V and slow degradation after 45 h of continuous operation under overall water-splitting conditions. This study presents a method of fabricating high-performance water electrolysis electrodes by coating the metal surface with a carbon layer under the catalysts.
研究领域:
材料科学
·
能源研究
✓ 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）