ENERGY & FUELS
·
2022
·
IF 4.654
Cheng Lan,Heping Xie,Yifan Wu,Bin Chen,Tao Liu
Electrochemical seawater splitting using efficient HER (hydrogen evolution reaction) and OER (oxygen evolution reaction) electrocatalysts have become an appropriate method for the mass production of green hydrogen. In this study, a noble-metal free OER electrocatalyst consisting of Mo-doped Ni3S2 nanocluster arrays on Nickle foam (Mo–Ni3S2/NF)─fabricated using a modified one-step solvothermal approach─is developed and evaluated. The proposed electrocatalyst demonstrates exceptional OER activity, requiring overpotentials of only 212 and 291 mV to deliver OER current densities of 10 and 100 mA cm–2, respectively, in alkaline seawater. The presence of Mo promotes Ni–S coordination, resulting in strong electronic interactions and substantially enhanced OER kinetics. Meanwhile, surface sulfate ions and (oxy)hydroxide (NiOOH) generated during the OER lead to enhanced activity and corrosion resistance, enabling Mo–Ni3S2/NF to operate continuously at 100 mA cm–2 for 500 h in alkaline natural seawater. This study is expected to inform the progression of sulfur-based transition-metal electrocatalysts for seawater oxidation.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2023
·
IF 9.9
Tang Jie,Sun Shengjun,He Xun,Zhang Hui,Yang Chaoxin,Zhang Min,Yue Meng,Wang Hefeng,Sun Yuntong,Luo Yonglan,Alfaifi Sulaiman,Farouk Asmaa,Hamdy Mohamed S.,Sun Xuping,Wang Huiqing,Ying Binwu
The development of highly efficient and durable oxygen evolution reaction (OER) catalysts for seawater electrolysis is of great importance for applications. Here, an amorphous FeMoO 4 nanorod array on Ni foam is reported as a highly active OER electrocatalyst in alkaline seawater, requiring only overpotentials of 303 and 332 mV to achieve 100 and 300 mA·cm −2 , respectively. Moreover, it shows strong long-term electrochemical durability for at least 50 h.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiajia Yang,Yun Li,Tian Tian,Haitao Shi,Zia Ahmad,Ningbo Geng,Jing Jin,Yanqiang Huang,Haijun Zhang,Hongjun Fan,Jiping Chen
According to the global vision of “carbon peak and carbon neutrality”, extracting uranium from natural seawater is regarded as a promising candidate for meeting nuclear fuel demand. Nevertheless, owing to the very low uranium concentration and complexity of natural seawater, the development of adsorbent materials for extracting uranium from seawater with satisfactory efficiencies remains a great challenge. In this work, we for the first time developed a novel mesocellular silica foam (MSF) supported hyperbranched poly(amidoxime-ethyleneimine) (PAO-PEI) network ( [email protected] ). After systematic evaluation, the [email protected] exhibited high adsorption capacity and excellent reusability, fast adsorption kinetics as well as good adsorption selectivity and affinity towards uranyl ions, simultaneously. Besides the obtained short equilibrium time of ∼ 20 h, the [email protected] achieved a remarkable adsorption capacity of 926.2 mg-U/g-Ads. for 100 mg/L of uranium water solution. Meanwhile, the [email protected] showed evident higher selectivity towards uranium (29.3 mg g −1 ) against vanadium (7.2 mg g −1 ) and other coexisting metal ions in simulated seawater. Moreover, excellent reusability of [email protected] in eight consecutive adsorption–desorption cycles was also observed. More importantly, satisfactory extraction efficiencies (90.6–92.9 %) for U-spiked real seawater was obtained in 48 h. Finally, a uranium adsorption capacity of 1.102 mg g −1 for coastal seawater in 20 days was obtained. All these findings demonstrate the relatively good potential of [email protected] for extracting uranium from real seawater.
研究领域:
材料科学
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环境科学
·
核工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2023
·Vol. 29
·期 38
·e202300621
·
IF 4.3
Peng Sun,Qingxi Wang,Yongyu Wang,Xubo Yuan,Jin Zhao,Lixia Long,Sidi Li,Xin Hou
Graphical Viscous , Hofmeister effect-enhanced macromolecular adhesives were synthesized via a facile one-step copolymerization. The Hofmeister effect effectively improve the adhesive performance of the polymeric adhesives in nature seawater. Deployment of adhesives in natural seawater to in situ bonds is urgently needed in engineering fields. However, stable adhesion in natural seawater remains a challenge due to the turbulent environment and high ion concentration. Herein, we reported a viscous, macromolecular underwater adhesive enhanced by Hofmeister effect (EHUA) for practical application in dynamic seawater. EHUA was synthesized via a facile one-step copolymerization. After transferred into seawater, the solvent of EHUA was exchanged to seawater, and thereby hydrogen bonds inside the adhesive were activated and enhanced by Hofmeister effect. We demonstrated EHUA can adhere on the surface in turbulent seawater, and the adhesive strength could reach 1.691 MPa. In addition, the adhesives also exhibited long-term storage stability and convenient recyclability. These fascinating properties enable adhesives to seal leaky pipelines, repair damaged ships and construct buildings in turbulent seawater. This work may open an avenue for the design of adhesives for seawater environments.
研究领域:
材料科学
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化学工程
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海洋工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Yi Qin,Guangling He,Yunlong Li,Yuhua Liu,Wenyan Liu,Lei Dong,Liangmin Yu,Li Wang
Amphiphilic hydrogel/organic substrate interfaces are commonly generated with a hydrophobic layer, which enhances underwater adhesion of the hydrogel via aggregation and assembly of the oleophilic structural units in the amphiphilic hydrogel. However, water absorption is considerably weakened by the hydrophobic interactions, which inhibits the formation of a stable hydration layer at the hydrogel/aqueous interface and leads to degradation of the anti-fouling ability of the amphiphilic hydrogel. Herein, composite amphiphilic hydrogel anti-fouling materials were prepared by mixing an amphiphilic hydrogel prepolymer and the pure aqueous structural units of a hydrogel prepolymer. In particular, adhesion of the hydrogels was strengthened by the oleophilic structural units of the amphiphilic hydrogel, and the hydrophilic structural units of the pure aqueous hydrogel formed a stable hydration layer at the hydrogel/aqueous interface; thus, the anti-fouling performance was strongly enhanced. As a result, superior adhesion of the composite amphiphilic hydrogel was maintained, and its resistance to shedding was clearly manifested in the experimental results obtained after immersion in static seawater (60 d) and rotating seawater (30 d); additionally, the water absorption capacity and anti-fouling effect were significantly better than those of the control amphiphilic hydrogel materials, e.g., the water uptake rate of the composite hydrogel BSH60T (S% = 324.2 %) was 6.7 times higher than that of the amphiphilic polymer hydrogel BS60T (S% = 48.3 %). Both proteins and Nitzschia closterium f. minutissima were very weakly attached to the surface of the composite amphiphilic hydrogel, and excellent anti-fouling performance was observed for the test panels in practical marine environments. This study provides a creative approach to optimizing the adhesion and anti-fouling properties of the hydrogel anti-fouling materials.
研究领域:
材料科学
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生物医学工程
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海洋科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Miao Lei,Jun Zhang,Junhang Huang,Junpeng Guo,Chang Liu,Bolin Li,Ye Li
It is of great strategic value for the recovery of uranium resources in seawater. In this work, Fe 3 S 4 /Fe 7 S 8 was synthesized by hydrothermal method to extract the radioactive nuclides of U(Ⅵ). Results of batch experiment discovered that Fe 3 S 4 /Fe 7 S 8 exhibited good U(Ⅵ) removal performance in a wide pH response range, and also had satisfactory selectivity towards uranyl ions even in the presence of co-existing ions (such as K + , Na + , Mg 2+ , Ca 2+ , Cl - , SO 4 2- ). At the temperature of 25°C and pH of 9, the adsorption achieved equilibrium after 120 min with the maximum adsorption capacity of 257.07 mg/g. In addition, the 5 successive adsorption-regeneration experiment and the real seawater experiment of trace U(Ⅵ) adsorption implied that Fe 3 S 4 /Fe 7 S 8 had outstanding reusability and practical application potential in U(Ⅵ) extraction. XRD results showed that the magnetic adsorbent was composed of Fe 3 S 4 and Fe 7 S 8 , with a high crystallinity and stable structure. The ratio of iron to sulfur was close to 7:8 according to semi-quantitative results of SEM-EDS . Further characterization analysis of FTIR and XPS revealed that the removal mechanism of Fe 3 S 4 /Fe 7 S 8 towards U(Ⅵ) mainly included the complexation of S(-Ⅱ), and the reduction of S 2− , S 2 2- and Fe(Ⅱ).
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2022
·Vol. 12
·期 2
·122
·
IF 4.562
Tong Li,Yuhong Wang,Xinyan Wang,Caixia Cheng,Kaifeng Zhang,Jie Yang,Guangshuo Han,Zhongpeng Wang,Xiuju Wang,Liguo Wang
Forward osmosis membranes have a wide range of applications in the field of water treatment. However, the application of seawater desalination is restricted, so the research of forward osmosis membranes for seawater desalination poses new challenges. In this study, zeolitic imidazolate framework-8 (ZIF-8) was synthesized by a mechanical stirring method, and its crystal structure, surface morphology, functional group characteristics, thermochemical stability, pore size distribution and specific surface area were analyzed. The cellulose acetate (CA)/ZIF-8 mixed matrix forward osmosis membrane was prepared by using the synthesized ZIF-8 as a modified additive. The effects of the additive ZIF-8 content, coagulation bath temperature, mixing temperature and heat treatment temperature on the properties of the CA/ZIF-8 forward osmosis membrane were systematically studied, and the causes were analyzed to determine the best membrane preparation parameters. The structure of the CA membrane and CA/ZIF-8 mixed matrix forward osmosis membranes prepared under the optimal conditions were characterized by Fourier Transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), contact angle and Atomic force microscope (AFM). Finally, the properties of the HTI membrane (Membrane manufactured by Hydration Technology Innovations Inc.), CA forward osmosis membrane and CA/ZIF-8 mixed matrix forward osmosis membrane were compared under laboratory conditions. For the CA membrane, the water flux and reverse salt flux reached 48.85 L·m−2·h−1and 3.4 g·m−2·h−1, respectively. The reverse salt flux and water flux of the CA/ZIF-8 membrane are 2.84 g·m−2·h−1and 50.14 L·m−2·h−1, respectively. ZIF-8 has a promising application in seawater desalination.Keywords:desalination;ZIF-8;forward osmosis membranes
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Yuangang Li,Rongrong Wang,Huajing Li,Xiaoliang Wei,Juan Feng,Kaiqiang Liu,Yongqiang Dang,Anning Zhou
Co-Pi decorated TiO2@graphitic carbon nitrides (g-C3N4) nanorod arrays (denoted as CCNRs) with different mass ratios of g-C3N4 have been constructed on the FTO substrate through three processes, hydrothermal growth, chemical bath deposition and electrodeposition. First, TiO2 nanorod arrays were grown onto a FTO substrate by a hydrothermal method. Second, g-C3N4 was coated onto the TiO2 nanorod arrays by immersing the above substrate with TiO2 nanorod arrays into a solution of urea and then heated at higher temperature. In this procedure, the amount of the g-C3N4 on the TiO2 nanorod arrays can be controlled by tuning the concentration of the urea solution. At last, Co-Pi were decorated on the surface of the TiO2@g-C3N4 by electrodeposition. The as-prepared CCNRs were characterized by XRD, FESEM, TEM, XPS, UV–vis, and FTIR, respectively, which illustrated that Co-Pi moieties were successfully decorated on the hybrid TiO2@g-C3N4 nanorod arrays. Photoelectrochemical (PEC) measurements have demonstrated that the prepared CCNRs serve as an efficient and stable photoanode for PEC seawater splitting. The photocurrent density reaches 1.6 mA/cm2 under 100 mW/cm2 (AM1.5G) light illumination at 1.23 V (RHE). More significantly, the CCNRs photoanode is quite stable during seawater splitting and the performance remain undiminished even after 10 h continuous illumination. Finally, a systematical photocatalytic mechanism of the Co-Pi decorated TiO2@g-C3N4 was proposed, and it can be considered as potential explanation of enhanced PEC performance.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Chaoen Li,Ziyu Zhang,Li Che,YuYang Zhou,Honglin Gao,Hanjie Sun,Aiyi Dong
Electrolyzing seawater presents a promising strategy to address the energy crisis. The optimally sulfur-doped S 0.45 -MnCr layered double hydroxide (LDH) catalyst demonstrates exceptional hydrogen evolution reaction (HER) performance in alkaline seawater at 50 °C, requiring overpotentials of only 57.9 mV and 245.4 mV to achieve 10 and 500 mA cm −2 , respectively. For overall seawater splitting, it requires only 1.72 V to deliver 100 mA cm −2 . When used as a cathode in a magnesium-seawater batteries (MSBs), it delivers a power density of 7.80 mW cm −2 . Sulfur doping simultaneously triggers the formation of highly active MnCO 3 during synthesis. Characterization confirms that sulfur doping promotes chromium leaching, thereby enlarging the electrochemical active surface area (ECSA). In situ XRD analysis at various potentials verifies the formation of additional active MnCO 3 species during HER, consistent with the activity enhancement observed in chronopotentiometric measurements. This work offers novel insights for designing bifunctional catalysts for direct seawater electrolysis.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Shuaichuan Cui,Xingxing Wang,Yifan Huang,Shihan Liu,Ziming Li,Yifan Zhang,Shusen Chen,Pengyang Deng
Herein, a defect-rich UiO-66-NH 2 hybrid membrane (DUUM) was successfully synthesized via in-situ growth of defective UiO-66-NH 2 onto irradiation-treated ultra-high molecular weight polyethylene fabrics to enhance the uranium extraction from seawater. The concentration of lattice defects within the framework is regulated by simply adjusting the ratio of ligand to metal (L/M), and DUUM with the L/M ratio of 1 exhibits the best uranium adsorption capacity. The adsorption kinetics investigation shows that DUUM has a higher adsorption rate than UiO-66-NH 2 powders, and the adsorption isotherms investigation shows DUUM has a saturated uranium adsorption capacity of 460 mg·g −1 which is about 5 times that of the defective UiO-66-NH 2 powders. DUUM exhibits a flux of 1440 LMH and a uranium removal efficiency of 65.5 % from natural seawater through single-pass filtration. More importantly, DUUM demonstrates excellent stability in real seawater environments (40-day) and under high doses of gamma-ray irradiation (300 kGy). The enhanced adsorption capacity is attributed to the membrane structure of DUUM which enhances exchange efficiency at the interface between uranium and DUUM via filtration, and the lattice defects which increase the specific surface area and expose more adsorption sites. The high stability results from the inherent hydrophobicity and radiation crosslinking features of the UP substrates. This study about DUUM will promote the practical application of efficient MOF membrane in fast uranium extraction from real seawater, as well as nuclear wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Song Ningbo,Yin Wanzhong,Xie Yu,Yao Jin
Using seawater for mineral flotation conserves fresh water resources and offers significant environmental and economic benefits. However, the adverse effect of seawater restricts its application in mineral flotation. The regulators can eliminate the adverse effect caused by seawater during flotation separation of lead and copper. In this paper, the flotation separation of galena and chalcopyrite in seawater was tested. Compared with those in deionized water, the lead grade of concentrate in seawater flotation declined from 50.10% to 48.90%. Meanwhile, the recovery of galena declined from 74.33% to 60.58% and the SI value declined from 1.565 to 1.324. With the addition of SHMP (sodium hexametaphosphate), SS (sodium silicate) and EDTA (ethylenediamine tetraacetic acid), the SI value increased from 1.324 to 1.923, 2.002 and 1.939, respectively. Noteworthy, when EDTA was excessive, the grade of Pb was 60.80%, the recovery of galena was 60.86% and the SI value was 2.113. X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Atomic force microscopy, Density functional theory calculation and E-DLVO calculation verified the micro-flotation results and revealed the mechanism of action.
研究领域:
矿物加工工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MARINE CHEMISTRY
·
2019
·
IF 2.713
Yuxi Lu,Xuelu Gao,Chen-Tung Arthur Chen
In this study, a method was developed for the desalination and pre-concentration of three colloidal trace metals in seawater , namely Cd, Cu and Pb, using diethylammonium diethyldithiocarbamate and ammonium 1-pyrrolidine dithiocarbamate as chelates. Seawater samples were first treated with cross-flow ultrafiltration (CFUF) for the separation of the colloidal matter of different molecular weights , i.e. 1–3 kDa, 3–10 kDa and 10 kDa-0.22 μm. Then, after acid digestion , the organic chelates and the extracting agent chloroform were added at pH = 3.8. Finally, the organic phase was back extracted, and the target metals in all samples were measured using inductively coupled plasma mass spectrometry (ICP-MS) with low detection limits in the range of 0.13–1.18 pmol L −1 . The extraction efficiencies for the three metals were in the range of 92.2%–100.3% with an enrichment factor of 40, and their mass recoveries in the studied colloidal fractions were in the range of 83.1%–103.5%. The developed method has been successfully applied for the analysis of seawater samples collected from the sites off the south coast of North Yellow Sea in Shandong Peninsula , China. For the first time, the distribution of colloidal Cd, Cu and Pb in different molecular weights in this area is reported. The results obtained from real samples demonstrate that the developed method is simple, efficient and convenient for routine analysis with low detection limit.
研究领域:
海洋化学
·
分析化学
✓ 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）