Nano Energy
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2025
·
IF 17.1
Xin Zhao,Qian Guo,Ce Gao,Shuangxi Nie,Runcang Sun
Most reported hydrogel electrolytes exhibit incompatible electrolyte-electrode interface, overhigh modulus, extreme environment inadaptation, high costs and toxic residual. Inspired by moisturizing and ductile properties from skin, this study presents a cost-effective, low-toxicity and self-healing hydrogel electrolyte composed of gelatin, lignin sulfonate and LiBr. The hydrogen bonds within hydrogel electrolyte were significantly weakened by LiBr, thereby exhibiting ultra-soft properties under the fracture stress of 8.5 kPa and strain of 1558 %, retaining an elongation of 1030 % after instantaneous self-healing, and remaining electrolyte-electrode interface stable. Additionally, abundant disordered hydrogen bonds and remarkable hydration capability of the hydrogel electrolyte endowed the ultra-high ionic conductivity (1.26 mS/cm at −50 °C) and adaptability under extreme environment. Notably, the assembled supercapacitor remains effectively electrochemical performance from severe dehydration to ambient environment. This work provides insights for design of flexible hydrogel electrolytes with excellent environmental adaption.
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高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Jiyan Li,Meichen Liu,Min Qiao,Fei Wang,An Li
Solar-driven interfacial evaporation co-generation (SDIE-CG) technology can effectively solve problems such as low latent heat utilization in the evaporation process, which provides a reliable solution to the problem of hydropower shortage in remote areas. Herein, we report a tea residue microcrystalline cellulose (TMCC) aerogel (abbreviated as TCA), in which TMCC is regenerated by dissolution through the co-solvent method, and microcrystalline cellulose is rearranged by the directional slow freezing technique to get a TCA with a directional aligned pore structure, resulting in a good mechanical and salt-resistant property. Due to the internal doping of carbon black particles, the TCA has an average ultra-high absorbance of 97.46 %. The evaporation rate of TCA is up to 3.066 kg m −2 h −1 under 3 kW m −2 illuminations. The maximum output voltage of the TCA is 44.801 mV under 2 kW m −2 illuminations through the introduction of a suitable wind-assisted hydropower generation device. In addition, the TCA can effectively purify the wastewater containing traditional Chinese medicine, and the chemical oxygen demand (COD) value in wastewater shows a significant decrease after treatment. It is worth noting that TCA can maintain structural integrity and stable evaporation performance in saltwater under extreme pH conditions (2
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高影响因子
BULLETIN OF MATERIALS SCIENCE
·
2025
·Vol. 48
·期 1
·1-9
·
IF 2.1
Qi Wenqian,Deng Bo,Mao Hui
Despite the low levels of copper ions in aquatic environments, excessive concentrations of copper ions can eventually cause serious harm to animals and humans as they are biologically enriched and ecologically cycled. Herein, an appropriate and selective separating material for copper ions with low concentrations needs to be developed. In the present work, bayberry tannin-modified chitosan fibres (TMF) were fabricated for selective removal of Cu 2+ . The adjacent phenolic hydroxyl groups at the B ring of tannin enable them to chelate with heavy metal ions, while the fibre structure of chitosan is conducive to the extended distribution of the active sites. It showed an adsorption capacity of 14.98 mg g –1 for Cu 2+ at 303 K, which was higher than that of most conventional adsorbents and activated carbon. Moreover, in the presence of co-existing heavy metal ions, including Ni 2+ , Cd 2+ , Fe 3+ and Cr 3+ , we found that TMF showed highly selective adsorption of Cu 2+ , with Cu 2+ concentrations as low as 5 mg l –1 . The TMF can be robustly recycled through acid treatment with 96.6% desorption efficiency.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Yan Dong,Huiming Lin,Fengyu Qu
The magnetic mesoporous carbon materials have been synthesized by chemical activation followed by reduction of Fe(NO 3 ) 3 under N 2 condition. All these materials possess dual-pore mesopore texture (2.8–2.9 nm and 3.5–4.1 nm), large surface areas (975–1321 m 2 /g), and high pore volumes (0.85–1.08 cm 3 /g). The adsorption capability and behavior of four dyes, methylthionine chloride (MC), methyl orange (MO), rhodamine B (RB), and gongo red (GR), were carried out on these magnetic bimodal mesoporous carbon materials. All the materials show the well adsorption capacity of the four dyes (highest reach 768 mg/g). After investigating the adsorption isotherms of these dyes, they all fit the typical Langmuir adsorption model. And the adsorption amount is mainly affected by BET surface area and the structure/size matching between adsorbent and adsorbate. With the highest BET surface area and 1D short mesopore structure, the sample shows the larger adsorbing capacity for the smaller molecular dyes (MC, MO). Moreover, the 1D long mesopore is benefit to absorb the dye with 1D long chain structural molecule (GR), while the storage capacity of RB (2D molecular structure) on 1D mesoporous adsorbent is the lowest.
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高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Zewei Zhang,Xiaoqi Song,Ting Yu,Xiping Lei
Thanks to their high energy density, small size, and light weight, lithium-metal batteries have been widely used over an extended period. However, lithium ions cannot be uniformly deposited, and their poor heat resistance hinders the practical application of lithium-metal batteries. Therefore, it is necessary to design a kind of separator with high electrolyte affinity and good heat resistance in order to improve the problem of a commercial separator. In this study, reduced graphene oxide (rGO) and polyphenylene terephthamide (PPTA) were combined in different ratios and coated onto one side of a commercial polypropylene (PP) separator using a feasible coating technique. A comparison of electrolyte absorptivity and flame retardancy revealed that the composite separator exhibited superior properties compared to those of a PP separator. The rGO2/PPTA3@PP separator with hierarchical porosity and flame-retardant properties, exhibited high ion conductivity (0.59 × 10−3 S cm−1) and an improved lithium-ion transfer number (0.57) at room temperature. By using the composite separator in an LiFePO4‖Li battery, the discharge specific capacity could still reach 125.6 mA h g−1 even after 100 cycles under 1C. After undergoing a high–low temperature cycle, the average discharge specific capacity could remain 151 mA h g−1 at 50 °C and 51 mA h g−1 at −10 °C. In addition, after 1100 h cycles in the assembled Li‖Li symmetric battery, no obvious lithium dendrites appeared on the lithium metal surface, indicating that the composite separator could successfully inhibit the growth of lithium dendrites. This study presents a promising approach for the large-scale production of novel composite separators with high electrochemical performance and safety.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2012
·
IF 5.625
Ting Bao,Zhongkui Zhao,Yitao Dai,Xiaoli Lin,Ronghua Jin,Guiru Wang,Turghun Muhammad
CO preferential oxidation (PROX) reactions were performed over the supported Co 3 O 4 -CeO 2 catalysts on modified activated carbon (AC) for eliminating the trace CO from H 2 -rich gases. The effects of support modification by H 2 O 2 oxidation treatment , catalyst calcination temperature, Ce/Co atomic ratio ( n Ce/Co ), Co 3 O 4 -CeO 2 loading and reaction parameters on catalytic properties of the Co 3 O 4 -CeO 2 /AC catalysts were investigated. Various characterization techniques like scanning electron microscopy (SEM), X-ray diffraction (XRD) and H 2 temperature-programmed reduction (H 2 -TPR) were employed to reveal the relationship between catalysts nature and catalytic performance. Results illustrate that the supported Co 3 O 4 -CeO 2 catalyst on modified AC exhibits excellent catalytic properties, which highly depends on dispersity and reducibility of Co 3 O 4 affected by the time of support treatment ( t p ), calcination temperature, n Ce/Co and loading. The supported 35 wt% Co 3 O 4 -CeO 2 catalyst (1:8 of n Ce/Co ) on the modified AC with H 2 O 2 oxidation treatment for 6 h demonstrates the best catalytic properties and the almost complete CO transformation takes place in a wide temperature range of 125–190 °C. Moreover, it is also found that the developed catalyst exhibits an outstanding catalytic stability, and 100% CO conversion can be maintained as the time on stream evolutes up to 1800 min even in the presence of CO 2 and H 2 O in the feed. The optimized Co 3 O 4 -CeO 2 /AC may be a robust and promising catalyst for eliminating trace CO from H 2 -rich gases.
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CORROSION SCIENCE
·
2025
·
IF 8.5
Huan Guo,Bingzhu Wang,Ruifeng Li,Cheng Su,Jixiang Dai,Yong She,Yongzhong Zhao,Jianjun Sha
Aiming at forming a stable ablation layer for hafnium-based ultrahigh-temperature ceramics under ablation environment, in this work, the Ta-based ceramic was introduced into the Hf-based ceramic, and the effect of Hf/Ta molar ratios on the ablation response behavior and mechanism of (Hf, Ta)B 2 -(Hf, Ta)C-SiC ceramics was investigated. It was found that the introduction of Ta could form a continuous and dense ablation layer. When Hf/Ta= 0.9:0.1, the ceramic composite presented excellent ablation resistance, and the linear ablation rate was −0.083 μm/s, which was only 5.85 % of that of Hf-based ceramics (HfB 2 -HfC-SiC). The excellent ablation resistance attributed to that the ablation products (Ta 2 O 5 and Hf 6 Ta 2 O 17 ) could strongly bonded to the substrate, which was conducive to enhance the stability of the ablation layer.
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MEDICINAL CHEMISTRY RESEARCH
·
2015
·Vol. 24
·期 8
·3327-3333
·
IF 1.402
Ye Lianbao,Wu Jie,Yang Jiebo,Chen Weiqiang,Luo Yan,Zhang Yanmei
Abstract HGF/c-Met signaling pathway has come into the spotlight as a promising therapeutic target for inhibiting tumor growth and has become one of the leading molecular targets in cancer. Various strategies are currently in development to disrupt the HGF–Met signal transduction pathway, in which small molecular inhibitors have been a particularly active field. On the basis of the structures of two c-Met inhibitors, PF-04217903 and JNJ-38877605, some novel 7-[(quinolin-6-yl)methyl] purines ( 4a – 4e ) were rationally designed on the principle of bioisosterism strategy. These compounds were synthesized and evaluated as novel c-Met inhibitors. Molecular docking experiments analyzed the results and explained the molecular mechanism of eminent activities to c-Met. The results showed that all the title compounds were active against c-Met enzyme to some extent. Though these compounds did not demonstrate inhibition as we expected, this study provided important information for building diversification of chemical library and molecular docking experiment supplied the basis for further research works. Graphical Abstract Some novel
7-[(quinolin-6-yl)methyl] purines as potential c-Met inhibitors have been designed and prepared. Their synthesis and spectral characterization are reported here.
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高影响因子
ANALYTICAL CHEMISTRY
·
2015
·
IF 5.636
Zhaosheng Qian,Lujing Chai,Cong Tang,Yuanyuan Huang,Jianrong Chen,Hui Feng
A convenient, reliable, and highly sensitive real-time assay for alkaline phosphatase (ALP) activity in the continuous and recyclable way is established on the basis of aggregation and disaggregation of carbon quantum dots (CQDs) through the competitive assay approach. CQDs and adenosine triphosphate (ATP) were used as the fluorescent indicator and substrate for ALP activity assessment, respectively. Richness of carboxyl groups on the surface of CQDs enables their severe aggregation triggered by cerium ions, which results in effective fluorescence quenching. Under the catalytic hydrolysis of ALP, ATP can be rapidly transformed to phosphate ions. Stronger affinity of phosphate ions to cerium ions than carboxyl groups is taken advantage of to achieve fluorescence recovery induced by redispersion of CQDs in the presence of ALP and ATP. Quantitative evaluation of ALP activity in a broad range from 4.6 to 383.3 U/L with the detection limit of 1.4 U/L can be realized in this way, which endows the assay with high enough sensitivity for practical detection in human serum. The assay can be used in a recyclable way for more than three times since the generated product CePO4 as a precipitate can be easily removed from the standard assay system. This strategy broadens the sensing application of fluorescent CQDs with excellent biocompatibility and provides an example based on disaggregation in optical probe development.
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PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
X.U. Yang,Z.H.E.N.G. Leizhi,L.I.U. Chengbao,C.H.E.N. Feng,Q.I.A.N. Junchao,Q.I.U. Yongbin,M.E.N.G. Xianrong,C.H.E.N. Zhigang
Due to its special electron configuration, large number of electrochemical reactive sites, and a high theoretical specific capacitance, Ni 0.85 Se has great application potential for supercapacitor electrodes. However, the poor charge driving ability and easy aggregation of Ni 0.85 Se hinder the full utilization of its electrochemical reactive site, thus limit its practical application. Here, nano-rod-like highly crystalline graphitic carbon nitride (CCN) was synthesized via molten salt assisted method, and then CCN/Ni 0.85 Se composite nanomaterials were synthesized by hydrothermal induction. Through various characterization and electrochemical tests, nano-rod-like CCN not only improves the poor electrical conductivity and incomplete surface reactive site exposure of bulk g-C 3 N 4 prepared by traditional thermal polymerization, but also improves the charge dynamics and enrich the electrochemical active sites of sheets Ni 0.85 Se, and improves the electrochemical activity of the composite. On the base of results, CCN/Ni 0.85 Se-7 has the best specific capacitance of 1234 F g −1 at 1 A g −1 , which is significantly higher than that of pure phase Ni 0.85 Se (841.2 F g −1 ) and CCN (34.4 F g −1 ). The CCN/Ni 0.85 Se-7//AC two-electrode device exhibited a maximum energy density of 29.11 Wh kg −1 , a maximum power density of 8499.86 W kg −1 , and good capacitance retention ability of 81.46 % after 2000 cycles.
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JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
·
2016
·
IF 1.613
Jiade Wang,Binxun Hong,Xinyang Tong,Shufeng Qiu
The process of recovering waste sulfuric acids using H2O2 catalytic oxidation is studied in this paper. Activated carbon was used as catalyst. Main operating parameters, such as temperature, feed rate of H2O2, and catalyst dosage, have effects on the removal of impurities from waste sulfuric acids. The reaction kinetics of H2O2 catalytic oxidation on impurities are discussed. At a temperature of 90°C, H2O2 feeding rate of 50 g (kg waste acid)−1 per hour, and catalyst dosage of 0.2 wt% (waste acid weight), the removal efficiencies of COD and chrominance were both more than 99%, the recovery ratio of sulfuric acid was more than 95%, and the utilization ratio of H2O2 was 88.57%.Implications: Waste sulfuric acid is a big environmental problem in China. The amount of waste sulfuric acid is huge every year. Many small and medium-sized businesses produced lots of waste acids, but they don’t have an appropriate method to treat and recover them. H2O2 catalytic oxidation has been used to treat and recover waste sulfuric acid and activated carbon is the catalyst here. Main parameters, such as temperature, feed rate of H2O2, and catalyst dosage, have been investigated. The reaction kinetics are discussed. This method can be economical and feasible for most small and medium-sized businesses.
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RSC Advances
·
2016
·Vol. 6
·期 53
·47486-47490
·
IF 3.289
Chenhao Zhao,Libin Xu,Zhibiao Hu,Sheng'en Qiu,Kaiyu Liu
Porous carbon with a unique 3D structure has been prepared by the immediate carbonization of potassium tartrate. At an optimal carbonization temperature of 700 °C, the carbon mainly composed of micro- and small meso-porous structure has a Brunauer–Emmett–Teller (BET) specific surface area of 816.2 m2 g−1, and the element Se with an amorphous structure is uniformly encapsulated into the porous structure of carbon. The weight ratio of Se in the composite can reach ∼50%. As the Li–Se battery cathode, the composite shows a (2nd) reversible discharge capacity of 550.5 mA h g−1 with an initial coulombic efficiency of 68.2% at 0.24C, and a discharge capacity of 485.3 mA h g−1 can be retained after 80 cycles. Even at a high current density of 1.2C, the cell also delivers a stable discharge capacity of about 452.3 mA h g−1. The good electrochemical performances of the as-prepared composite may be attributed to high specific surface area and small porous size.
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