Journal of Energy Storage
·
2024
·
IF 8.9
Jianguo Duan,Xinshuai Yan,Kun Lei,Jianguo Cheng,Yaxiong Wang,Qingzong Su,Shimin Xu,Jianming Li,Qing Ma
The phase change materials (PCMs) are encapsulated into porous materials for collecting and storing heat energy has been widely used to overcome the intermittency of solar energy utilization. However, due to the inherent big pore structure and surface characteristics, metal porous materials are not ideal for PCM leakage-proof and slow photo-thermal response. To address these issues, A micro/nanostructured graphene-polyvinyl alcohol nanosheets/Cu(OH) 2 nanowire on a three-dimensional Cu foam (CF) to fill with PCM was designed and prepared. In the composite PCM, the polyvinyl alcohol/reduced graphene oxide (PRG) films coated on Cu(OH) 2 @Cu foam (CCF) provided a large number of active sites for the adsorption of modified paraffin wax (PWS). The prepared composite PCM has a stable structure and high thermal conductivity properties, meanwhile, the strong PRG films play a key role in enhancing leakage-proof and stability. The results show that the enthalpy value of PRG-CCF/PWS are 160.25 J·g −1 after 200 thermal cycles; which still maintains excellent cycle thermal reliability. In addition, under the simulated solar irradiation intensity is 120 mW·cm −2 , the heat storage rate and photo-thermal conversion efficiency of PRG-CCF/PWS are 1.37 J·s −1 and 90.25 %, respectively. It shows excellent photo-thermal response and uniform temperature distribution. This work provides an efficient, sustainable and affordable strategy for manufacturing high-performance composite PCM that can efficiently achieve solar energy utilization and energy management.
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高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 21
·7256-7264
·
IF 4.39
Lei Ye,Yeqing Zhang,Limin Wang,LinXiu Zhao,Yaqiong Gong
Due to the slow kinetics of oxygen evolution at the anode, the efficiency of electrocatalytic water decomposition is critically reduced, and its large-scale application is severely restricted. Therefore, it is urgent to develop electrocatalysts with excellent performance and stability to accelerate the oxygen evolution reaction (OER) reaction kinetics. Herein, a self-supporting binder-free electrocatalyst was successfully prepared using in situ grown Cu(OH)2 nanowires on CF as the carrier to grow ZIF-67 via a room temperature immersion method. The combination of Cu(OH)2 nanowires and the unique structure of ZIF-67 forms a three-dimensional nanostructured catalyst, in which the unique structure and the existence of synergy may contribute to a larger electrochemical active surface area, expose more electrochemically active sites, adjust the electronic structure, and accelerate the rate of electron transfer, thus greatly improving the electrocatalytic activity and durability for OER. The as-prepared Cu(OH)2@ZIF-67/CF exhibited excellent OER performance under alkaline conditions and required overpotentials of 205 mV and 276 mV to drive current densities of 10 mA cm−2 and 100 mA cm−2, respectively, with a small Tafel slope of 70.5 mV dec−1 for OER. The stability test of Cu(OH)2@ZIF-67/CF at the current density of 10 mA cm−2 displayed excellent stability for 22 h. This study provides a feasible strategy for the rapid preparation of low-cost and efficient electrocatalysts in alkaline media.
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高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 7
·10895-10911
·
IF 5.164
Xiangrui Zeng,Lulu Wang,Jilin Wang,Zhiqiang Qu
Summary A series of anion exchange membranes (quaternized chitosan/cation metal-organic framework [MIL-X-QCS]) were prepared via purposeful inserting the cationic metal-organic framework as the multifunctional filler into quaternized chitosan (QCS). The successful preparation of the anion exchange membrane was confirmed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and Scanning electron microscope (SEM). In this research, we converted the charge-balanced MOFs skeleton Cr-MIL-101 into the cationic metal skeleton (Cr-MIL-101) + Cl − by anion stripping, and cooperated with quaternary amine groups to construct a high-speed OH − transmission channel. The introduction of a rigid MOF structure reduces the water uptake and swelling ratio of the composite membrane by 27% and 37%, respectively. At 80°C, the OH − conductivity of the MIL-9-QCS membrane (The composite membrane doped with 9 wt% Cr-MIL-101 crystals) reaches 2.30 × 10 −2 S·cm −1 and the power density reached its maximum (90.2 mW·cm −2 ), and the tensile strength reaches 20.12 MPa, which was higher than 18.7 MPa of Nafion-115 membrane. The spatial network structure of MOFs reduced the methanol permeability of MIL-9-QCS membrane by 24% compared with the original QCS membrane. Furthermore, the MIL-9-QCS composite membrane exhibited excellent alkali stability, where after being soaked in 2 mol L −1 NaOH solution at 60°C for 240 hours, its OH − conductivity still reached 77% of the initial value.
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高影响因子
FUEL
·
2023
·
IF 7.4
Jie Yu,Zhuoran Hou,Huayu Zhang,Xinsheng Zhou
The fabrication of electrode materials with a high specific capacitance is essential for the development of enhanced performance supercapacitors. A novel binder-free electrode material, composed of MnS/Ni 3 S 2 and Co(OH) 2 , was synthesized on nickel foam by hydrothermal, sulfuration, and electrodeposition techniques. The MnS/Ni 3 S 2 exhibited a unique flower-like structure, resulting in a high specific capacitance of 1780 F g −1 at 1 A/g. By optimizing the synthesis conditions through several characterization and electrochemical tests, the MnS/Ni 3 S 2 @Co(OH) 2 composite was obtained, which displayed an ultrahigh specific capacitance of 2495 F g −1 at 1 A/g and a capacitance retention rate of 86.1% after 5000 cycles at 10 A/g in three-electrode system. The synergistic coupling of MnS/Ni 3 S 2 and Co(OH) 2 , along with the conductive nickel foam substrate, donated towards the excellent electrochemical performance. Furthermore, the MnS/Ni 3 S 2 @Co(OH) 2 //AC asymmetric supercapacitor (ASC) device was constructed with MnS/Ni 3 S 2 @Co(OH) 2 as positive electrode, activated carbon (AC) as negative electrode and 1 M KOH solution as electrolyte, demonstrated a high energy density of 68.6 Wh kg −1 at 750 W kg −1 and excellent cycle stability with 91.2% capacitance retention after 10,000 cycles at 15 A/g. The outstanding electrochemical properties observed in both the pre-electrodeposition and post-electrodeposition samples indicate the effectiveness of reasonable design and construction of composite as a pathway for producing electrode materials with exceptional performance.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 50
·期 12
·6772-6783
·
IF 1.938
Hou Xiaoshuo,Yang Ming,Yu Hui,Yang Ying,Li Dan,Dong Xiangting
In this work, a 3D Z-scheme photocatalyst Ag/AgBr/Zn 3 V 2 O 7 (OH) 2 ·2H 2 O (Ag/AgBr/ZVO) was synthesized by a hydrothermal method, and a subsequent surface deposition-optical reduction technique. The prepared flower-like Ag/AgBr/ZVO was characterized by scanning election microscopy (SEM), x-ray powder diffraction (XRD), x-ray photoelectron spectroscopy (XPS), UV-vis spectrophotometry, N 2 adsorption-desorption isotherm based on Brunauer-Emmett-Teller (BET) theory, and electrochemical tests. The photocatalytic degradation performance of the catalyst was investigated by the degradation of methylene blue (MB) dye by visible light irradiation. Compared with bare Zn 3 V 2 O 7 (OH) 2 ·2H 2 O (ZVO) nanoflowers, the photocatalytic effect of the 3D Z-scheme heterojunction Ag/AgBr/ZVO was significantly enhanced. The catalyst of 2h-Ag/AgBr/ZVO exhibited the strongest photocatalytic activity, of which the MB degradation rate is about 98.8% in 100 min, which was about five times that of pure ZVO. The increase in the photodegradation rate is ascribed to the accelerated interface charge-transfer process, the faster photogenerated carrier separation rate and the enhancement of visible light absorption. In view of the trapping of the reaction intermediate and the electron spin resonance (ESR) measurement, we propose a possible Z-scheme photocatalytic mechanism. This improved visible-light response likely originates from a synergistic effect of the different components. This work offered an ideal method for producing stable, efficient, and recyclable photocatalysts suitable for use in the visible light range.
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高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Ningyan Cheng,Yurui Xue,Qian Liu,Jingqi Tian,Lixue Zhang,Abdullah M. Asiri,Xuping Sun
In this paper, we develop a novel strategy toward the in-situ growth of core/shell nanorods array consisting of Cu(OH) 2 -CuO nanosheets as the shell and Cu as the core on Cu foil [Cu/(Cu(OH) 2 -CuO) NA/CF]. As an integrated 3D non-noble-metal oxygen evolution anode, the Cu/(Cu(OH) 2 -CuO) NA/CF shows high catalytic activity with an onset overpotential of 350 mV and a Tafel slope of 76 mV/dec. It needs an overpotential of 417 mV to drive current density of 10 mA/cm 2 and maintains its catalytic activity for at least 22 h. The attractive performances make it promising candidate as a future high-performance catalyst for applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Haijun Chen,Chunli Kang,Shiyi Zhao,Zhuowen Wang,Haiyang Liu,Deming Dong,Jiao Qu,Na Zheng,Xiuyi Hua
Ineffective separation of photo-carriers and slow photoreaction rates seriously limit the decontamination effectiveness of the photocatalyst. To overcome these limitations, herein, the oxygen vacancies modified Z-scheme Ag 3 PO 4 /FeSnO(OH) 5 heterojunction was designed with FeSnO(OH) 5 as a co-catalyst. In this photosystem, Ag 3 PO 4 and FeSnO(OH) 5 function as oxidation and reduction centers of Ag 3 PO 4 /FeSnO(OH) 5 photocatalysts, respectively. Importantly, oxygen vacancies in the Z-scheme heterojunction provide an effective charge transport pathway, which not only inhibits the photocorrosion of Ag 3 PO 4 but also reduces electron-hole recombination, significantly boosting the photocatalytic decontamination performance and long-term stability of the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst. Remarkably, the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst demonstrated outstanding photocatalytic performance, 100 % degrading indomethacin (IDM) under visible light in just 30 min through the main generation of h + that attacks the active atoms of IDM, prominently outperforming other counterparts. Besides, three principal degradation pathways were proposed, and the toxicity of the degradation products was significantly reduced. The Ag 3 PO 4 /FeSnO(OH) 5 exhibited high photocatalytic degradation efficacy across different qualities of water. This research offers an oxygen vacancy modified engineering combined with a Z-scheme heterojunction strategy for constructing extraordinary photocatalysts for environmental purification.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuanzhi Yue,Guozhe Sui,Yan Zhuang,Dongxuan Guo,Shuang Meng,Dantong Zhang,Xue Yang,Ning Liu,Yue Li,Jinlong Li
In this study, we developed a synergistic modulation strategy through in situ dual-anion/cation doping coupled with vacancy engineering, demonstrating a direct ammonia etching approach to synthesize Cu/S-In(OH) 3 with controlled indium vacancies (V In ) from CuInS 2 precursors. This in situ doping approach provides a uniform distribution of Cu cations and S anions throughout the material, overcoming conventional doping heterogeneity. Simultaneously, an indium vacancy (V In ) structure was precisely engineered and regulated through a growth limitation strategy. The synergistic interplay between the uniformly dispersed anions, cations and V In significantly suppresses the recombination of photogenerated carrier within In(OH) 3 , thereby allowing more carriers to participate in the surface catalytic reaction. Both experimental and theoretical analyses demonstrate that the introduction of V In into the defective states leads to a direct reduction in the band gap, significantly improving photocatalytic hydrogen evolution performance. The optimized Cu/S-In(OH) 3 with V In achieves a photocatalytic hydrogen production rate of 1.22 mmol g −1 h −1 , approximately 122 times higher than that of pure In(OH) 3 (0.01 mmol g −1 h −1 ). This work establishes a paradigm of integrating in situ doping and vacancy engineering strategies to rationally design In(OH) 3 -based materials, offering generalizable principles for advanced catalytic applications.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhichao Yu,Jingfeng Wang,Wei Cao,Chang Luo,Shanshan Wang,Zhijun Ding,Lei Guo,Zhihong Qiao,Puhong Wang
Metal oxide semiconductor (MOS) gas sensor is an effective tool for NO 2 detection. In this work, a NO 2 sensor based on MXene-OH/ZnMnO was fabricated via a seed layer induced self-assembly method, exhibiting remarkable gas response value(280) to 100 ppm NO 2 under 25℃ and ultraviolet activation. Besides, the prepared sensor presents ultra-fast response and recovery speeds (8/40 s), low detection limit (250 ppb), and high selectivity. The enhanced sensing performance was explained by the first-principles calculations, showing that the increased electrical conductivity, more electron transfer numbers and higher adsorption energy promotes effective transport of charge carriers on the surface of sensing materials and NO 2 gas molecules.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yue Wang,Xiangyan He,Qi Zhang,Ling Luo,Tianping Lv,Xiuwu Wang,Junhua Zhang
Construction of highly efficient catalysts is crucial for the catalytic transfer hydrogenation (CTH) of bio-based carbonyls to valuable chemicals and fuels. Herein, we successfully synthesized a series of uniformly dispersed Zr(OH) 4 -Fe 3 O 4 nanoparticles with the regulation of sodium dodecyl benzene sulfonate (SDBS), which exhibited exceptional activity for the CTH of furfural (FAL) into furfuryl alcohol (FOL). Systematic characterizations revealed that SDBS effectively modified the interaction between Fe 3 O 4 and Zr(OH) 4 , thereby enhancing Lewis acidity by facilitating the construction of electron-deficient zirconium sites. Meanwhile, the presence of oxygen vacancies and surface hydroxyl groups in Zr(OH) 4 -Fe 3 O 4 -SDBS facilitated the adsorption and activation of both substrate and hydrogen donor. Thanks to these synergistic effects, a complete conversion of FAL with an impressive selectivity towards FOL was achieved, with a remarkable turn-over frequency value reaching as high as 42.5 h −1 . Encouragingly, Zr(OH) 4 -Fe 3 O 4 -SDBS also demonstrated its universality in the CTH of carbonyl compounds by exhibiting remarkable separation capability while maintaining its activity and structure after being reused for 11 cycles without significant changes.
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产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2022
·Vol. 147
·期 17
·9431-9450
·
IF 4.755
Liu Fu-Ya,Zhou Xue-Ling,Zhao He,Hu Wei-Dong,Xu Jian-Zhong,Jiao Yun-Hong,Qu Hong-Qiang
The synergistic effect and mechanism of the spherical CoSn(OH) 6 (T-CHS) and ammonium polyphosphate (APP) on epoxy resin (EP) were investigated by limiting oxygen index (LOI), vertical combustion test (UL-94), cone calorimeter, tensile machine, thermogravimetric analysis-coupled with a Fourier transform infrared spectrometer (TGA/FTIR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy, and Raman spectrometer. The results indicate that when the mass ratio of APP and T-CHS is 5.9:0.1 and 5.5:0.5, respectively, there is a synergistic effect between APP and T-CHS, and the flame retardant EP samples could pass the V-0 level of UL-94 test and their tensile properties have little difference to that of the blank EP. Compared with the blank EP, the total heat release and total smoke production of EP/5.9APP/0.1 T-CHS are decreased by 25% and 26%, respectively. TGA/FTIR results of the EP samples under N 2 atmosphere indicate the NH 3 production of EP/5.9APP/0.1 T-CHS is decreased by 47% and the CO 2 and H 2 O production is increased by 991% and 210%, respectively, when compared with that of the blank EP. APP and T-CHS show a good synergistic effect on promoting the retention of C, Co, Sn, and N elements in the char residues. The char residues of EP/5.9APP/0.1 T-CHS and EP/5.5APP/0.5 T-CHS samples contain Co 3 O 4 , CoO, SnO, SnO 2 , oxides of phosphorus, and Sn element, which form a more compact physical barrier.
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高影响因子
Energy Storage Materials
·
2017
·
IF 0
Chunlong Dai,Linyu Hu,Min-Qiang Wang,Yuming Chen,Jin Han,Jian Jiang,Yan Zhang,Bolei Shen,Yubin Niu,Shu-Juan Bao,Maowen Xu
Lithium-sulfur (Li-S) batteries are of great importance as promising electrochemical-energy storage systems in view of their overwhelming advantage of energy density . However, their commercial applications are still far away mainly due to fast capacity decay in a high sulfur content caused by low utilization of active material and severe polysulfide dissolution during electrochemical cycling. Here we have designed and prepared uniform α-Ni(OH) 2 hollow spheres constructed from ultrathin nanosheets with the thickness of ~3.5 nm as a hollow sulfur nanosphere host for Li-S batteries. Specifically, the synthesized hierarchical hollow spheres not only manifest the advantages of hollow structure and robust protective shell to encapsulate a very high content of sulfur up to 81 wt%, but also offer sufficient functionalized surfaces to directly bond and entrap polysulfides in hollow sphere. When used as cathode materials for Li-S batteries, the S@Ni(OH) 2 double-shell hollow hybrids exhibit a highly stable cycle life over 1000 cycles at 1 C with a very small capacity decay rate of only ~0.04% per cycle.
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