HYDROMETALLURGY
·
2023
·
IF 4.7
Lianghong Duan,Shenghai Yang,Yongming Chen,Changhong Wang
Ammonia system shows great potential in the treatment of zinc secondary resource, and electrodeposition has been confirmed as a vital process to extract zinc from the ammonia leachate. However, the ammonia system-based zinc electrodeposition is either inefficient or the zinc deposit in of undesired quality. This study proposes a polyethylene glycol 20,000 (PEG20000 polymer of formula H(OCH 2 CH 2 ) n OH)-assisted ammonia system to conduct high-quality and efficient zinc electrodeposition. The practical operation achieved a low electrical energy consumption of 2391 kW h t −1 Zn and a high current efficiency of 99%, with a smooth and compact zinc deposit of fine (30.2 nm) grains. Further investigation of electrodeposition behavior revealed the following: (i) deposition principle, (ii) diffusion property, and (iii) three-dimensional (3D) instantaneous nucleation mode, and provided a useful reference for guiding the process design and conditions of the practical operation. In general, PEG20000-assisted ammonia system turns out to be a technically and economically viable option to electro-deposit zinc, for its high energy competitiveness and high-quality Zn products.
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高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Hongjing Wang,Yuqin Liang,Songliang Liu,Hongjie Yu,Kai Deng,You Xu,Xiaonian Li,Ziqiang Wang,Liang Wang
The research on high-efficiency two-dimensional (2D) catalytic materials for the small-molecule oxidation-assisted hydrogen evolution reaction (HER) is prospective for efficient hydrogen production. Herein, we report heterostructured Pt/Rh metallene with Pt nanoparticles (NPs) uniformly anchored on Rh metallene for the HER and ethylene glycol oxidation reaction (EGOR). The ultrathin sheet structure of the Pt/Rh metallene offers high surface areas and sufficient active sites. More importantly, the Pt/Rh heterostructure can optimize catalytic active centers and adjust electronic structure. Thus, Pt/Rh metallene exhibits superior electrocatalytic HER activity with a low overpotential of 28 mV in 1 M KOH at 10 mA cm–2 and EGOR activity with a specific activity of 8.39 mA cm–2 in 1 M KOH with 3 M EG, along with outstanding CO tolerance. In a two-electrode system, Pt/Rh metallene requires a low potential of 0.51 V for stable and efficient hydrogen production at 10 mA cm–2 in 1 M KOH + 3 M EG, with the simultaneous production of high-value-added products. The job proposes an attractive strategy for the synthesis of 0D/2D metallene toward simultaneous energy-saving hydrogen production and chemical update.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jianguo Yu,Zehui Yu,Yunling Jia,Ting Ran,Ming Song,Yanshuang Zhang,Qing Wang,Yuning Qu,Lili Wang
Direct alcohol fuel cells' performance is significantly affected by the phase and composition of the catalyst, thereby the development of high-performance alcohol oxidation catalysts is essential. In this study, PVA preparation was used for the first time to create PdCu core-shell nanoflowers with a high electrochemically active surface area and a potent synergistic effect. Notably, the presence of PVA causes Pd and Cu nanoparticles with different reduction rates to form a core-shell structure, and the Pd nanoparticles continue to migrate regularly under the action of PVA, forming a flower-like morphology with a high degree of branching. Cu@Pd 22.3 catalyst exhibited 13 times higher catalytic performance (4353.04 mA mg Pd −1 ) than Pd/C (334.09 mA mg Pd −1 ) in ethylene glycol oxidation reaction. The Cu@Pd 22.3 catalyst also exhibits higher stability than commercial Pd/C in stability tests lasting up to 20,000 s. This core-shell combination and highly branched structural design result in more active sites for fast ion adsorption/desorption,offering an original method to improving the activity and endurance of polyol oxidation.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Rui Liu,Yingxue Xu,Wanfen Pu,Peng Shi,Daijun Du,James J. Sheng,Huaisong Yong
Graphene oxide (GO) has continued to prompt fantastic discoveries and applications; however, the highly extended two-dimensional π-conjugation of pristine graphene sheets leads to the aggregation of GO sheets in strong brine, which impairs the applications of GO. In this work GO with covalently-bound oligomeric ethylene–glycol brushes (termed as GOC) was prepared using graphite oxide as a raw material. The synthesized GOC was investigated by a holistic combination of experimental characterizations and molecular dynamic simulations. Our results showed that GOC behaves like a highly anisotropic colloid that well dispersed in various organic solvents, and retained high dispersion stability in strong brine even after storage at high temperature (e.g, 90 ℃). The GOC can sharply decrease surface tension after reaching a very low threshold concentration of 0.04 mg/mL; on account of that, it successfully generated water-in-oil Pickering emulsions with an internal water content of as high as 90 vol%. The GOC also functions as a liquid crystal at the oil–water interface without the need of external assistances/stimuli. We envisage that the prepared multifunctional GOC materials will stimulate a broad range of its applications when exceptional interfacial properties are required such as in the field of food, cosmetics, and petroleum industries.
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高影响因子
Journal of the American Chemical Society
·
2022
·
IF 16.383
Yuan Tian,Zhiliang Gao,Ning Wang,Ming Hu,Yi Ju,Qiang Li,Frank Caruso,Jingcheng Hao,Jiwei Cui
Surface modification with poly(ethylene glycol) (PEGylation) is an effective strategy to improve the colloidal stability of nanoparticles (NPs) and is often used to minimize cellular uptake and clearance of NPs by the immune system. However, PEGylation can also trigger the accelerated blood clearance (ABC) phenomenon, which is known to reduce the circulation time of PEGylated NPs. Herein, we report the engineering of stealth PEG NPs that can avoid the ABC phenomenon and, when modified with hyaluronic acid (HA), show specific cancer cell targeting and drug delivery. PEG NPs cross-linked with disulfide bonds are prepared by using zeolitic imidazolate framework-8 NPs as templates. The reported templating strategy enables the simultaneous removal of the template and formation of PEG NPs under mild conditions (pH 5.5 buffer). Compared to PEGylated liposomes, PEG NPs avoid the secretion of anti-PEG antibodies and the presence of anti-PEG IgM and IgG did not significantly accelerate the blood clearance of PEG NPs, indicating the inhibition of the ABC effect for the PEG NPs. Functionalization of the PEG NPs with HA affords PEG NPs that retain their stealth properties against macrophages, target CD44-expressed cancer cells and, when loaded with the anticancer drug doxorubicin, effectively inhibit tumor growth. The innovation of this study lies in the engineering of PEG NPs that can circumvent the ABC phenomenon and that can be functionalized for the improved and targeted delivery of drugs.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yuting Zhong,Zhirui Wu,Xiaoguang Liu,Ling Li
Establishing strong interfacial interactions through novel support materials and poly-metallic alloys is an effective method to boost the catalytic performance for electrocatalytic alcohols oxidation . Herein, PdBiMn particles embedded pleated layered rGO-modified novel prismatic Al-based metal-organic framework (Al 2 (OH) 2 (H 2 O) 2 [C 10 O 8 H 2 ] or MIL-118A) composites were fabricated via a simple hydrothermal-impregnation reduction approach and employed in ethylene glycol oxidation reaction (EGOR). It is noticed that the strong electronic effects of PdBiMn alloys and the strong adsorption of oxygened species could alter the electronic structure of Pd and facilitate the removal of toxic species, while the rGO/MIL-118A strongly fixes abundant PdBiMn alloys, providing more active sites and accelerating the interfacial electron transfer . Impressively, the forward peak current density of trimetallic PdBiMn@rGO/MIL-118A catalyst is 239.62 mA cm −2 , it is almost 8.86 times greater than that of Pd/C. Additionally, after 3600 s chronoamperometry test, the current density of trimetallic catalyst retains about 75.54% of the initial current density.
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高影响因子
POLYMER INTERNATIONAL
·
2022
·Vol. 72
·期 1
·27-38
·
IF 3.213
Zishuo Ye,Hailin Lu,Guiquan Chai,Changlei Wu,Jian Chen,Leifeng Lv
Poly(vinyl alcohol) (PVA) hydrogels have shown potential applications in bionic articular cartilage due to their tissue-like viscoelasticity, good biocompatibility and low friction. However, their lack of adequate mechanical properties is a key obstacle for PVA hydrogels to replace natural cartilage. In this study, poly(ethylene glycol) (PEG) and glycerol were introduced into PVA, and a PVA/PEG–glycerol composite hydrogel was synthesized using a mixing physical crosslinking method. The mechanical properties, hydrophilicity and tribological behavior of the PVA/PEG–glycerol hydrogel were investigated by changing the concentration of glycerol in PEG. The results showed that the tensile strength of the hydrogel reached 26.6 MPa at 270% elongation at break with 20 wt% of glycerol plasticizer, which satisfied the demand of natural cartilage. In addition, the excellent hydrophilicity of glycerol provides good lubricating properties for the composite gel under dry friction. Meanwhile, self-healing and cellular immunity assays demonstrated that the composite gel could have good self-healing ability and excellent biocompatibility even in the absence of external stimuli. This study provides a new candidate material for the design of articular cartilage, which has the potential to facilitate advances in artificial joint cartilage repair. © 2022 Society of Industrial Chemistry.
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高影响因子
MATERIALS LETTERS
·
2022
·
IF 3.574
Yu Liu,Gan Yuan,Chunlei Guo,Chi-Vinh Ngo,Wei Li
Ethylene glycol (EG) is widely used as a cooling agent in factories, aviation, and automobiles. However, its corrosive nature can create significant damage and reduce the life cycle of devices. This paper compares three different methods to achieve the superhydrophobic anti-corrosion aluminum surfaces for working in an engine coolant environment. The methods are combinations between femtosecond laser fabrication and chemical coatings using Polydimethylsiloxane (PDMS) and Triethoxy-1H,1H,2H,2H-tridecafluoro-n-octylsilane (TTFOS). All the samples show superhydrophobicity with contact angles greater than 150°, and sliding angles smaller than 10°. The superhydrophobic surface (SHS) show the best corrosion rate up to three orders of magnitude compared to flat surfaces when working in an engine coolant environment. Moreover, corrosion inhibition efficiencies of the fabricated surfaces impress the best results greater than 98%. The anti-corrosion behavior of the SHS is explained. After comparing the performances of the surfaces fabricated by three methods, the most suitable method is proposed to produce anti-corrosion aluminum surfaces for applications using engine coolant as an environment.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Yuanchao Pei,Wanjun Zhang,Yaxin Zhang,Jie Ma,Yang Zhao,Zhiyong Li,Jianji Wang,Ran Du
How to design thermal-responsive functional ionic liquids that can respond in a reversible manner still remains a challenge for the construction of ionic liquid-based smart systems, and they easily find applications in various scientific fields, including phase transfer catalysis, smart soft materials, controlled drug delivery and green separation. In this work, a series of PEGylated ionic liquids were prepared, and their structures were confirmed by NMR and FTIR spectra. The thermal properties of these ionic liquids were characterized by DSC and TGA. In addition, their physicochemical properties were measured in detail, including density and viscosity. Different models were used to fit the density and viscosity data. The critical micelle concentrations of the Aerosol OT-based PEGylated ionic liquids were also determined by the surface tension method, and they exhibited good surface activity. Furthermore, these PEGylated ionic liquids exhibit typical low critical solution temperature phase behavior. To illuminate the underlying mechanism of thermal-induced phase separation, temperature-dependent FTIR spectra were used to analyze the interaction between ionic liquids and water molecules. Finally, the thermally regulated PEGylated IL phase separation system was proposed as an efficient strategy to separate heavy metal ions and rare earth metal ions from water media. The results presented here offer key information to design new thermoresponsive ionic liquids and their applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Kaiyu Dong,Houkang Pu,Te Zhang,Huizhen Dai,Xihui Zhao,Luming Zhou,Kuankuan Wang,Yingying Wang,Yujia Deng
Designing and modulating the morphological structure of catalysts is of great significance to improve their catalytic activity and stability. In this work, PtRu alloy nanodendrites with tunable components were constructed by the introduction of Ru. Owing to the presence of electron transfer in the alloy nanocatalysts and their unique nanodendritic structures, Pt 0.8 Ru 0.2 alloy nanocatalysts with optimal composition exhibited excellent electrocatalytic activity and stability in ethylene glycol oxidation reaction (EGOR) and methanol oxidation reaction (MOR). Among the nano-catalysts, mass activities of Pt 0.8 Ru 0.2 nanodendritic catalysts to EGOR and MOR were 6.1 A mg −1 and 4.6 A mg −1 , and the specific activities were 11.5 mA cm −2 and 8.68 mA cm −2 , respectively, much better than those of commercial Pt/C catalysts. This work provides a strategy for designing efficient PtRu catalysts for fuel cells.
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2021
·Vol. 62
·期 3
·664-676
·
IF 2.428
Renzhang Wang,Liufang Chen,Qian Lei,Junhua Shi,Changzhong Chen
A linear polyurea (LPU) and a crosslinked polyurea (CPU) were respectively synthesized by condensation between 4,4′-diaminodiphenyl methane and multivariate isocyanates, and then were used as supporting material to load polyethylene glycol (PEG) for shape-stabilized phase change materials (ssPCMs). LPU has an incompact flocculent morphology with higher surface area and pore volume than CPU, and CPU is composed of contiguous bead particles with many interspaces. The shape stability of PEG/CPU ssPCMs is better than that of PEG/LPU ssPCMs with the same PEG mass fraction due to the different molecular interactions between PEG and the polymer matrix. The maximum PEG mass fraction in PEG/LPU and PEG/CPU ssPCMs LPU are 65% and 75%, respectively, and the corresponding melting phase change enthalpies are 82.66 J/g and 98.13 J/g, respectively. The heat storage efficiency of PEG/CPU ssPCMs is smaller than that of PEG/LPU ssPCMs with the same PEG content, caused by the greater movement restriction of PEG chains from the crosslinked network of CPU. The prepared ssPCMs have favorable reusability after 100 heating–cooling thermal cycles and have good thermal stability below 250°C, which is helpful to widen extent of application for latent heat storage.
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Tingjun Wang,Chaoming Wang,Zheng Huang,Jiahao Liu,Huibin Yin,Peng Zhu
Due to the insulating nature of organic phase change materials , it is impossible to directly trigger latent heat thermal energy storage via an electrical way. In this work, through crosslinking, freeze-drying and pyrolysis , the interconnected carboxymethylcellulose sodium-derived carbon aerogel (abbreviated as CCA) with high porosity, good solar-thermal conversion capability, electrical conductivity , and mechanic strength is firstly fabricated successfully. The organic phase change material of polyethylene glycol (PEG) is then infiltrated into the CCA via vacuum infiltration to obtain the PEG/CCA15 composite phase change materials that melt at 52.1 °C with latent heat of 173.4 J/g. Electro-thermal test results display that PEG/CCA15 composite present low resistance (1.64 Ω), high electrical conductivity (4.201 S/cm) and excellent electro-thermal energy conversion efficiency (55.6 % under applying 1.4 V). Further results also show that PEG/CCA composites exhibit good photo-thermal energy storage and release abilities. Our results indicate that the as-prepared PEG/CCA15 is a potential candidate to be applied in electrical/solar energy utilization.
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高影响因子
危险品化学品经营许可证（带存储）