CHINESE JOURNAL OF POLYMER SCIENCE
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2024
·Vol. 42
·期 7
·984-991
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IF 4.1
Liu Xu-Fei,Zhang Chong-Rui,Peng Hua-Wen,Zhao Qiang
Significant progress has been made in wet adhesives for low salinity water, but exploration of general ionic adhesives for natural seawater is less developed because the high salinity could weaken interfacial bonding and shields electrostatic interactions, resulting in adhesion failure. Thus, the design of adhesives for natural seawater represents challenges less resolved. Herein, a cationic polyelectrolyte (PECHIA) containing imidazolacetonitrile unit was explored to prepare adhesives enabled by natural seawater. By combining the ion shielding effect with the “cation-dipole” interactions between PECHIA chains, aqueous solution of the PECHIA underwent coacervation and self-crosslinking in natural seawater, allowing for underwater adhesion to various substrates in seawater. The instantaneous lap-shear and tensile adhesion strengths are 47 and 119 kPa, respectively, while the cured adhesive shows ∼739 kPa tensile adhesion in natural seawater. The design of PECHIA enables wet adhesives viable for applications in the diversified scenarios of natural seawater.
研究领域:
材料科学
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化学
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粘附科学
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海洋技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 50
·2304674
·
IF 13.3
Kailai Zhang,Xiaodong Sun,Haijun Hu,Ge Yan,Anqi Qin,Yali Ma,Hongwei Huang,Tianyi Ma
Mechanical energy driven piezocatalytic hydrogen (H 2 ) production is a promising way to solve the energy crisis . But limited by the slow separation and transfer efficiency of piezoelectric charges generated on the surface of piezocatalysts , the piezocatalytic performance is still not satisfactory. Here, defect engineering is first used to optimize the piezocatalytic performance of microcrystalline cellulose (MCC). The piezocatalytic H 2 production rate of MCC with the optimal defect concentration can reach up to 84.47 µmol g −1 h −1 under ultrasonic vibration without any co-catalyst, which is ≈3.74 times higher than that of the pure MCC (22.65 µmol g −1 h −1 ). The enhanced H 2 production rate by piezoelectric catalysis is mainly due to the introduction of defect engineering on MCC, which disorders the symmetry of MCC crystal structure, improves the electrical conductivity of the material, and accelerates the separation and transfer efficiency of piezoelectric charges. Moreover, the piezocatalytic H 2 production rate of MCC with the optimal defect concentration can still reach up to 93.61 µmol g −1 h −1 in natural seawater, showingits commendable practicability. This study presents a novel view for designing marvelous-performance biomass piezocatalysts through defect engineering, which can efficiently convert mechanical energy into chemical energy .
研究领域:
材料科学
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能量转换
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催化
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Yongyan Xue,Jing Chen,Jinglin Gou,Jie Yang,Tuoping Hu,Jingjing Jiao,Xiao-Qing Wang
Achieving clean hydrogen energy requires the logical development of stable, high-performance, and inexpensive hydrogen evolution reaction (HER) electrocatalysts. Herein, a range of Ni-MOF@MoS 2 -X/NF (X = 0.05, 0.06, 0.10, 0.15, 0.20) heterogeneous electrocatalysts were constructed by anchoring MoS 2 nanosheets onto the surface of nickel-based metal-organic framework (Ni-MOF) material self-supported on nickel foam (NF) via weak interactions under a two-step solvothermal method, which exhibited flower-like microspheres with interconnected nanosheets. Compared with Ni-MOF/NF, Ni-MOF@MoS 2 -X/NF (X = 0.05, 0.06, 0.10, 0.15, 0.20) show prominent HER electrocatalytic property in 1.0 M KOH solution. Specifically, the optimal Ni-MOF@MoS 2 -0.15/NF exhibits better HER electrocatalytic property than the Pt/C catalyst, which has a lower overpotential of only 25 mV with the Tafel slope of 54.68 mV dec −1 at a current density of 10 mA cm −2 in alkaline solution. Furthermore, in natural seawater, an overpotential of 90 mV was required to drive the HER process at a current density of 10 mA cm −2 . The 60 h stability tests of Ni-MOF@MoS 2 -0.15/NF in natural seawater and 1.0 M KOH showed excellent endurance. Density functional theory (DFT) calculations indicate that the ΔG H∗ of Ni-MOF@MoS 2 (0.50 eV) is lower than that of Ni-MOF (0.96 eV). This work presents a novel approach to constructing effective HER catalysts made of non-precious metals in natural seawater.
研究领域:
电化学
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材料科学
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能源技术
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催化
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Zhang Qing Yun,Zhang Lin Juan,Zhu Jian Qiu,Gong Le Le,Huang Zhe Cheng,Gao Feng,Wang Jian Qiang,Xie Xian Qing,Luo Feng
With the rapid development of nuclear energy, problems with uranium supply chain and nuclear waste accumulation have motivated researchers to improve uranium separation methods. Here we show a paradigm for such goal based on the in-situ formation of π - f conjugated two-dimensional uranium-organic framework. After screening five π -conjugated organic ligands, we find that 1,3,5-triformylphloroglucinol would be the best one to construct uranium-organic framework, thus resulting in 100% uranium removal from both high and low concentration with the residual concentration far below the WHO drinking water standard (15 ppb), and 97% uranium capture from natural seawater (3.3 ppb) with a record uptake efficiency of 0.64 mg·g −1 ·d −1 . We also find that 1,3,5-triformylphloroglucinol can overcome the ion-interference issue such as the presence of massive interference ions or a 21-ions mixed solution. Our finds confirm the superiority of our separation approach over established ones, and will provide a fundamental molecule design for separation upon metal-organic framework chemistry.
研究领域:
核能
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材料科学
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环境科学
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化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Yang Yang,Meihong Lin,Yunhua Song,Gulinigaer Tuerhong,Jiaqi Dai,Tao Zhang,Donggang Guo,Lu Liu
Water splitting is a promising hydrogen production technology limited by the slow kinetic oxygen evolution reaction (OER). The development of highly active and robust OER catalysts is in high demand. A series of three-dimensional (3D) self-supported FeOOH@Ni(OH) 2 heterostructures supported on nickel foam are synthesized and used as efficient OER catalysts using a simple hydrothermal method . The benefits of the appropriate 3D nanoflower morphology, the large number of FeOOH nanosheets adhered on the nanoflower surface, the formation of heterogeneous interfaces, and the synergistic effect of Ni(OH) 2 and FeOOH significantly improve the OER catalytic performance of the material. The optimal catalyst in 1 M KOH, alkaline artificial seawater (1 M KOH + 1 M NaCl), and alkaline nature seawater (1 M KOH + seawater) require only 285, 286, and 325 mV overpotential, respectively, to achieve 100 mA cm −2 current density and has robust stability. This study contributes to the rational design of interface-engineered heterostructures for seawater splitting by synthesizing high catalytic activity catalysts.
研究领域:
材料科学
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电化学
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催化
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能源材料
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2023
·
IF 12.8
Xing Wang,Mengjun liang,Jiancong Zhang,Xuncai Chen,Mono Zaw,Than Zaw Oo,Nyein Wint Lwin,Su Htike Aung,Yuan Chen,Fuming Chen
High energy consumption and low salt removal rate are key barriers to realizing practical electrochemical seawater desalination processes. Here, we demonstrate a novel solar-driven redox flow desalination device with double photoelectrodes to achieve efficient desalination without electrical energy consumption. The device consists of three parts: one photoanode unit, one photocathode unit, and one redox flow desalination unit sandwiched between the two photoelectrode units. The photoelectrode units include a TiO 2 photoanode and a NiO photocathode sensitized with N719 dye, triiodide/iodide redox electrolyte, and graphite paper integrated electrodes decorated with 3,4-ethylene-dioxythiophene. Two salt feeds are located between two ferro/ferricyanide redox flow chambers. Under light illumination, high-quality freshwater is obtained from brackish water containing different concentrations of NaCl from 1000 to 12,000 ppm with a high NaCl removal rate. The device can work in multiple desalination cycles without significant performance declines. Furthermore, natural seawater with an ionic conductivity of 53.45 mS cm −1 is desalinated to freshwater. This new design opens opportunities to realize efficient and practical solar-driven desalination processes.
研究领域:
环境科学
·
材料科学
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化学工程
·
太阳能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiumei Liu,Ying You,Wenkang Yang,Liujin Yang,Xinyue Zhang,Ziyu Qin,Xueqiong Yin
A thermosensitive amidoxime-based hydrogel named PAOU was prepared from polyamidoxime through ion-imprinted polymerization, with UO 2 2+ as the template ions and N-isopropylacrylamide as the monomer. The PAOU was characterized by DSC, FTIR, SEM/EDS, XPS and Raman spectroscopy. PAOU expressed phase transition at 29.76 °C (exothermic peak) and 39.64 °C (endothermic peak), respectively, and still maintained good reversible thermosensitivity after five cycles of heating and cooling. The maximum adsorption capacity of PAOU (dry weight 10 mg) was 856.47 mg/g after adsorption for 50 min at 50 °C, pH 4.5, 80 mL 0.5 mg/mL UO 2 2+ solution. The quasi-second-order kinetic equation and the Langmuir adsorption isotherm model were both followed by the adsorption of UO 2 2+ by PAOU. The thermodynamic parameters indicated that the adsorption process of PAOU was endothermic (Δ H θ = 27.04 kJ/mol) and spontaneous (Δ G θ = −19.17 kJ/mol). After five cycles of adsorption–desorption experiments on PAOU under optimal adsorption conditions, the adsorption capacity of PAOU was 704.32 mg/g, being 82.23 % of the first adsorption capacity. The adsorption selectivity coefficients of PAOU in seven kinds of mixed metal ion solutions were 1.61 ∼ 42.04. It outperformed its non-imprinted equivalent in terms of adsorption selectivity. The adsorbent also showed good uranium adsorption ability in natural seawater.
研究领域:
材料科学
·
环境化学
·
核工程
✓ 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）