Journal of Energy Chemistry
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2025
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IF 14.9
Keke Chen,Yang Li,Yuhao Feng,Xuefeng Li,Zhiqiang Li,Shuming Liu,Chunhua Ge,Xiao Chen
Solar-thermoelectric generators (STEGs) capable of harnessing solar energy for conversion into clean electricity are pivotal for advancing towards carbon neutrality. The integration of phase change materials (PCMs) with STEGs facilitates power generation regardless of solar radiation flux due to their robust thermal management capacity. However, the inherent solar-thermal conversion efficiency limitation of PCMs hinders the production of high and sustained electrical output. Herein, a multidimensional engineering strategy is proposed to align two-dimensional (2D) molybdenum disulfide (MoS 2 ) nanosheets vertically in situ on a dodecahedron composed of zero-dimensional (0D) Co nanoparticles and three-dimensional (3D) high graphitized carbon derived from ZIF-67, thus significantly boosting the solar-thermoelectric energy generation of polyethylene glycol (PEG). The resultant PEG-Co/C@MoS 2 composite PCMs exhibit a high solar-thermal conversion efficiency of 92.89%, benefiting from the synergy of multiple components and unique structural arrangements. When coupled with thermoelectric devices, this powerful STEG yields a high and durable output voltage of 197.51 mV and a current of 52.47 mA under 100 mW cm −2 , outperforming the majority of previously reported literature. This PCM-integrated solar-thermoelectric generator overcomes limitations associated with temporal and meteorological variations, enabling simultaneous high-density heat and electricity generation for energy conservation and environmental sustainability.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Shuimiao Xia,Yinguo Li,Linwei Zhu,Qingyang Tang,Zelong Chang,Zengliang Ren,Davoud Dastan,Zhicheng Shi
Polymer films are promising dielectric materials for energy storage capacitors due to their light weight and flexibility. However, the adverse coupling between the permittivity and the breakdown strength presents a significant challenge for the enhancement of energy storage, especially at high temperatures. In this work, the Au@AO@Au@BT metal/ceramic composite nanofibers are prepared, in which barium titanate (BT) ceramic is used as the core to improve the permittivity and heat resistance of the nanocomposites. Aluminum oxide (AO) provides excellent interfacial compatibility, and the breakdown strength of the nanocomposite is enhanced by gold nanoparticles (Au NPs) with Coulomb blockade effect. This strategy achieves the compatibility of high permittivity and breakdown strength and improves the energy storage performance. As a result, the nanocomposites containing 0.3 wt% nanofibers achieve an ultra-high energy density of 8.64 J/cm 3 at 200 °C with an efficiency > 80 %, which is improved by 256 % compared to pure PEI (2.43 J/cm 3 ).
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Runrun Cheng,Yan Wang,Xiaochuang Di,Zhao Lu,Ping Wang,Mingliang Ma,Jinrui Ye
Nowadays, facing the inevitable electromagnetic (EM) pollution caused by many electronic products, it is urgent to develop high-performance microwave absorbing materials. In particular, the bimetallic carbon-based composites derived from MOFs exhibit excellent microwave absorption potential due to their simple preparation, low cost, adjustable morphology and magnetoelectric synergy mechanism. In this work, we successfully prepared plum-like NiCo@C composite by simple solvothermal method and carbonization treatment, which displays strong absorption (-55.4 dB) and wide effective absorption band (EAB, 7.2 GHz) when the loading is 20 wt%. The plum-like structure greatly enriches the non-uniform interface and the structural anisotropy contributes to the dissipation of electromagnetic waves . At the same time, the band hybridization and magnetic coupling of NiCo@C contribute to the coordination of EM characteristics. Overall, this work proves the feasibility of NiCo@C hierarchical composite in the field of microwave absorbing, and provides insight for the development of high-performance absorbers.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2022
·Vol. 169
·期 3
·034506
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IF 4.386
Shuiyun Shen,Lin Li,Cehuang Fu,Guanghua Wei,Xiaojing Cheng,Jiewei Yin,Xiaohui Yan,Gang Wu,Junliang Zhang
A highly active Fe/N doped porous carbon electrocatalyst is constructed benefiting from the elaborate employment of benzimidazole (BIm) as nitrogen precursor. Compared with 2-methylimidazole (2-MIm), BIm can strongly capture Fe ions and strengthen the Fe–N bond, thus more Fe–N4 active sites form in the electrocatalyst with an enhanced catalytic activity towards oxygen reduction. The optimal sample exhibits a half-wave potential of 0.80 V vs RHE in acidic media.
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CHEMISTRY OF MATERIALS
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2024
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IF 7.2
Wei Zeng,Yao Tian,Xuehua Dong,Ling Huang,Hongmei Zeng,Zhien Lin,Guohong Zou
Birefringent crystals are extensively utilized across diverse optical applications due to their unique property of splitting incident light into dual refracted rays, thereby modulating and controlling light polarization. The pursuit of promoting the birefringence of such crystals to facilitate device miniaturization has recently emerged as a prominent area of focus. In this investigation, we introduce two molybdenyl iodates, namely, C(NH2)3MoO3(IO3) and Rb2MoO2(I2O6)(IO3)2, conceived through a “cation–anion synergetic interaction” strategy. Each compound exhibits a one-dimensional chain structure. Despite processing similar wide band gaps (3.33 and 3.22 eV), these materials display a variance in their birefringence (Δn = 0.426 and 0.261 @546 nm). Notably, C(NH2)3MoO3(IO3) showcases the highest birefringence among all hitherto reported molybdenyl iodates, signifying its potential as a high-performance birefringent crystal. Theoretical analyses indicate that the C(NH2)3+ cation, acting as a birefringence-active unit, significantly bolsters the birefringence of molybdate iodates. Moreover, the presence of extensive hydrogen-bonding interactions between C(NH2)3+ cations and iodates influences the orientation of the highly anisotropic iodates, thereby further enhancing the birefringence of C(NH2)3MoO3(IO3). This research paves the way for the future exploration of organic–inorganic hybrid molybdenyl iodates exhibiting exceptional optical performance.
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JOURNAL OF ORGANIC CHEMISTRY
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2024
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IF 3.3
Jin Yan,Suijie Zhong,Xu Chen,Yihuan Luo,Hua Cao,Xiang Liu,Limin Zhao
Here, we report controlled and site-selective C–H alkenylation and dialkenylation of indolizines and pyrrolo[1,2-a]quinolines with β-alkoxyvinyl trifluoromethylketones under simple and practical conditions. Moreover, this direct C–H alkenylation strategy can also be extended to imidazo[1,2-a]pyridines. Notably, without a transition metal and external oxidant, efficient dehydrogenative β-alkenylation of tertiary amines with β-alkoxyvinyl trifluoromethylketones is presented.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Ying Pan,Congying Rao,Xiaolin Tan,Yun Ling,Ayushi Singh,Abhinav Kumar,Baohong Li,Jianqiang Liu
Rational designing of carbon-based adsorbent precursors is an important way to enhance adsorption performance. In this work, fascinating Co@C composites have been designed and fabricated using a new cobalt-seamed metal–organic nanocapsule (Co-MONC), which exhibits incredibly high adsorption capacity for chlorpromazine (CPZ) removal from aquatic environments. Benefiting from its interconnected micro- and mesoporous structures, well-dispersed and highly available Co adsorption active sites, the optimal Co@C-900 exhibits ultrahigh CPZ adsorption capacity (1039.53 mg g −1 ) and excellent recycling ability, outperforming the reported porous materials and commercial activated carbon. Moreover, the adsorption behaviors of CPZ for the composite have been comprehensively investigated and the plausible adsorption mechanism was proposed. Apart from this, the interaction mechanism between exposed Co adsorption active sites and CPZ have been suggested with the aid of density functional theory (DFT) calculations. The presented investigation demonstrated a facile and designable strategy for the fabrication of highly effectively adsorbents for organic contaminant removal.
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APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Yuanjing Meng,Muhammad Akbar,Jie Gao,Manish Singh,Te-Wei Chiu,Baoyuan Wang,Chen Xia,Liangdong Fan
Insufficient ionic conductivity of electrolyte materials and high manufacturing costs create bottlenecks in the commercialization of low-temperature solid oxide fuel cells (LT-SOFCs). Developing the semiconductor-ionic electrolyte represents a new research strategy for high-performance LT-SOFCs because of their attractive ion conduction and associated low polarization loss. In this study, a self-assembly approach is demonstrated by incorporating ABO 3 perovskite La 0.7 Sr 0.3 Cr 0.5 Fe 0.5 O 3-δ (LSCrF) into the fluorite structure CeO 2 , for developing 1LSCrF-xCeO 2 composite as semiconductor-ionic heterostructure for LT-SOFCs with superior electrochemical efficiency at the temperature below 550 °C and even down to 370 °C over unmodified and mechanically mixed samples. Self-assembly enables abundant nanoscale hetero-interfaces accompanied by widely distributed oxygen vacancies , which leads to the superior ionic conductivity of 0.018–0.112 S cm −1 , lower activation energy of 0.54 eV and better peak power density of 136–735 mW cm −2 over control samples at 370–550 °C, and stable operation for 50 h of resultant LT-SOFCs under a galvanostatic mode. This work highlights the important role of self-assembly in designing heterostructural semiconductor based electrolytes for high-performance LT-SOFCs.
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高影响因子
International Journal of Electrochemical Science
·
2023
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IF 1.5
Siyue Zhang,Hui Cheng,Baoli Wang,Fan Shi,Lijun Yan,Lina Zeng,Lin Li,Shuhai He,Wei Sun
Petal-shaped FeS@MoS 2 -C nanocomposite was synthesized using carbon fiber as the basic carrier by hydrothermal method. The uniformly dispersed nanocomposite, hemoglobin (Hb) and Nafion mixture were drip-coated on the newly prepared carbon ionic liquid electrode (CILE) to build a modified electrode named as Nafion/Hb/FeS@MoS 2 -C/CILE. The morphology and valence state of FeS@MoS 2 -C nanocomposite was investigated by SEM, TEM, XPS etc. and the biological structure of Hb was not changed based on UV-VIS and FT-IR spectroscopic analysis. Electrochemistry of Nafion/Hb/FeS@MoS 2 -C/CILE was recorded by cyclic voltammetry with voltammetric behaviors investigated. Also, the modified electrode has excellent catalytic performance for nitrite, hydrogen peroxide, bromate with the detection range as 0.10~5.00 mmol L -1 , 0.10~14.00 mmol L -1 , 0.05~25.00 mmol L -1 , respectively. The pickle juice sample was analyzed by this method satisfactory, further proving the practical application.
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SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Yehui Guan,Mingjun Dai,Tong Liu,Yingwei Liu,Fangmeng Liu,Xishuang Liang,Hui Suo,Peng Sun,Geyu Lu
A fuel-cell-type gas sensor based on the membrane electrode assemble (MEA) composed of proton exchange membrane (Nafion) and Pt/C sensing electrodes was fabricated for detection of CO at room temperature . The Pt/C electrodes materials were synthesized from Vulcan XC-72 carbon powders and hexachloroplatinic acid (H 2 PtCl 6 ). This paper mainly focused on the effect of various dispersants (ethylene glycol (EG) tetraethyl orthosilicate (TEOS), glycerol and EG/polytetrafluoro-ethylene (PTFE)) on the performance of the presented sensor. Results revealed that the sensor utilizing EG as the dispersant elicited the highest response current toward 50 ppm CO. The current of the sensor was linearly correlated with CO concentration in the range of 1–200 ppm, which sensitivity was 88 nA/ppm. In addition, the 90% response and recovery times of the sensor toward 50 ppm CO were 22 and 24 s, respectively. Besides, the prepared CO sensor also had a good repeatability and acceptable selectivity.
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 11
·4295-4303
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IF 3.288
Chao Wang,Xing Li,Yuzhou Liu,Nan Gao,Xing Xin
In this work, BaLi2Ti6O14 nanofibers coated by a thin carbon layer were rationally designed and synthesized by a controlled electrospinning process and a simple annealing process. The carbon content of the composite is as low as 1.91 wt%. This thin carbon layer is considered to contribute to remarkably improving the rate capability. Furthermore, BaLi2Ti6O14@C nanofibers can deliver a high reversible capacity of 95.0 mA h g−1 with a capacity retention of 83.4% at a high current density of 1000 mA g−1 after 800 cycles. Analysis of the electrochemical results showed that the existence of the carbon coating layer plays a positive role in improving the structural stability and ionic transport of BaLi2Ti6O14 during the charge/discharge processes, thereby indicating a general method for improving the electrochemical performance of electrode materials with poor electrical conductivity.
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JOURNAL OF CHROMATOGRAPHY A
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2013
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IF 4.612
Changzeng Wu,Jianji Wang,Zhiyong Li,Jun Jing,Huiyong Wang
In this work, glycine ionic liquids tetramethylammonium glycine ([N 1111 ][Gly]), tetraethylammonium glycine ([N 2222 ][Gly]), tetra-n-butylammonium glycine ([N 4444 ][Gly]), tetra-n-butylphosphonium glycine ([P 4444 ][Gly]) and tetra-n-pentylammonium glycine ([N 5555 ][Gly]) were synthesized and used to prepare aqueous two-phase systems (ATPSs) in the presence of K 2 HPO 4 . Binodal curves of such ATPSs and partition coefficients of a series of dinitrophenylated (DNP) amino acids in these ATPSs were determined at 298.15 K to understand the effect of cationic structure of the ionic liquids on the phase-forming ability of glycine ionic liquids, relative hydrophobicity between the phases in the ionic liquids ATPSs, and polarity of the ionic liquids-rich phases. With the attempt to correlate the relative hydrophobicity of the phases in the ATPSs with their extraction capability for proteins, partition coefficients of cytochrome-c in the ATPSs were also determined. It was shown that partition coefficients of cytochrome-c were in the range from 2.83 to 20.7 under the studied pH conditions. Then, hydrophobic interactions between cytochrome-c and the ionic liquid are suggested to be the main driving force for the preferential partition of cytochrome-c in the glycine ionic liquid-rich phases of the ATPSs. Result derived from polarity of the ionic liquids-rich phases supports this mechanism.
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