Journal of Energy Storage
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2024
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IF 8.9
Bin Hu,Wenxuan Hu,Xinyuan Qian,Min Zuo,Ziliang Wu,Yihu Song,Qiang Zheng,Guorong Shan,Miao Du
Layered double hydroxides (LDHs) have garnered significant attention as electrode materials for their ultra-high theoretical capacitance. However, LDHs are prone to phase transition and volume changes during charge/discharge process, which adversely affect their cyclic stability and applications. In this paper, a small amount of non-electrochemically active element, scandium (Sc), was firstly introduced into NiCo-LDHs by a facile and fast one-step potentiostatic electrodeposition with NH 4 Br as a modulator, effectively mitigating the influence of the Jahn-Teller effect. By doping slight Sc into NiCo-LDHs, the resulting electrode exhibited excellent electrochemical performance , with a specific capacitance of 1994 F g −1 (at 1 A g −1 ), and ultralong lifespan, retaining 82.7 % of its initial capacitance after 30,000 charge-discharge cycles. This work presents a promising strategy for the rapid preparation of LDHs-based supercapacitor electrodes that deliver both high specific capacitance and outstanding cycling performance.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Desen Zhou,Jun Zhang,Zhenxing Jin,Tingmin Di,Tielin Wang
Photocatalytic CO 2 reduction has been considered as a potential way to solve the energy problem and the greenhouse effect. In this work, layered g-C 3 N 4 /rGO/NiAl-LDHs heterojunctions were prepared by using a hydrothermal method, the optimized composite exhibited enhanced photocatalytic CO 2 reduction to CO (2.6 μmol h −1 g −1 ) and CH 4 (20 μmol h −1 g −1 ) activity, which was 3.7 and 14.2 times higher than that of pure g-C 3 N 4 , respectively. According to the experimental and density functional theory calculation (DFT) results, it is believed that with the large contact interface and excellent electron mobility rGO could act as an electron transfer bridge to facilitate the rapid charge migration and separation between g-C 3 N 4 and NiAl-LDHs. Thus, driven by the internal electric field, interfacial band edge bending, as well as the type II heterostructure, the activity of g-C 3 N 4 /rGO/NiAl-LDHs could be greatly enhanced. This work provides a possible way to rational design and fabrication of rGO-assisted composite systems with type II, Schottky, S-scheme, P-N and other heterojunctions.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
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IF 6.7
Dongzheng Wang,Guo Yang,Caiyi Jiang,Xingyong Liu,Bo Xing,Min Li,Yi Wang,Fuping Zhang,Xiaolin Shi,Qian Zhou
Polyvinylidene fluoride (PVDF) membrane in-situ coupling catalytic oxidation technology holds great promise as a means to mitigate membrane fouling. However, its application is constrained by several factors, including the inherent incompatibility with inorganic nanoparticles, unsatisfactory hydrophily, and limited catalytic capacity. In this study, a novel in-situ coupling Fenton membrane catalyst with high permeability and anti-fouling capacity was processed based on highly efficient FeNi-LDHs@Cellulose. The performance evaluation exhibit that pure water flux and TOC removal efficiency increased from 556.81 L·m −2 ·h −1 , 65.42% to 665.24 L·m −2 ·h −1 , 99.03 % while rate of Irreversible contamination (Rir) decreased from 42 % to 11.7 %, respectively. After 5 cycles, the pure water flux decreased from 665.24 L·m −2 ·h −1 to 471.13 L·m −2 ·h −1 , and the TOC removal efficiency and flux recovery rate (FRR) still remained above 90%. In addition, further mechanistic insights by pollution model, extended Derjaguin-Landau-VerweyOverbeek (XDLVO), Three-dimensional fluorescence (3D-EEM) and EPR verified that anti-fouling mainly attribute to high hydrophilicity and in-situ decomposition pollutants. Meanwhile, the decomposition mechanism of pollutants and generation path of OH and 1 O 2 were proposed. This research provides insights for further improving the permeability and anti-fouling performance of PVDF membrane in the field of treatment organic wastewater by combining organic with inorganic nanoparticles.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2023
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IF 3.8
Gaiqin Miao,Lifei Liu,Xia An,Xu Wu
In this work, a high-performance CuNiAl-LDHs catalyst was innovatively synthesized for electrochemical carbon dioxide reduction (CO 2 RR) of methanol (CH 3 OH) through the modulated synthesis of Cu-based layered double hydroxide (LDHs). It was found that the optimal CuNiAl-LDHs has superior CH 3 OH selectivity compared to CuAl-LDHs and CuMgAl-LDHs, with the Faraday efficiency (FE) of 76.4% for CH 3 OH generation at −1.2 V. And their FE and current density (4.8 mA·cm −2 ) remained stable during up to 24 h of electrolysis. Meanwhile, this study confirms the significant performance advantages of CuNiAl-LDHs over their derived composite oxides. Series characterization further proves that the excellent catalytic performance of CuNiAl-LDHs is importantly associated with their richness in Cu + and hydroxyl group (—OH). The research expands the application fields of LDHs compounds. Meanwhile, the series of discoveries provide a new insight for the preparation of CH 3 OH by constructing CO 2 RR.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL FIBER TECHNOLOGY
·
2025
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IF 2.7
Xuesong Zhang,Yue Feng,Weixiang Yuan,Haodong Wu,Tao Shen
The detection of ultra-low concentrations of lithium ions (Li + ) is of paramount importance for protecting human health and preserving the ecological environment. This paper proposes a fiber-optic sensor based on lithium/aluminum layered double hydroxides (Li/Al-LDHs) modified optical microfiber coupler (OMC). Firstly, the optimal diameter of the OMC is determined through simulation analysis to optimize the sensor parameters. Secondly, functional group functionalization is employed to facilitate a robust binding of the Li/Al-LDHs to the surface of the optical fiber. Lastly, the efficacy of the sensor in detecting low concentrations of Li + was validated through experimental means. The results demonstrated that the sensor exhibited a maximum detection sensitivity of 334.222 nm/μM and a limit of detection (LOD) of 1.272 nM within the range of 1–10 nM, exhibiting good linearity (R 2 = 0.986). Furthermore, the sensor displayed excellent stability, selectivity and response time, indicating its potential for application in the detection of Li + concentration in aqueous environments.
研究领域:
环境科学
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光学传感
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
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IF 7.392
Xue Gao,Kai Zheng,Qiyan Zhang,Xiaoqing Cao,Shan Wu,Jixin Su
In this work, the TiO 2 -RGO/LDHs photocatalyst was synthesized by a hydrothermal method using GO/LDHs as substrates. The structure and property of prepared materials were characterized via XRD, SEM, EDS, XPS, TEM, UV–vis spectroscopy, etc. Toluene, methanol, and ethyl acetate were selected as typical volatile organic pollutants model pollutants to examine the photocatalytic degradation effect of TiO 2 -RGO/LDHs. The photocatalytic efficiency of the TiO 2 -RGO/LDHs system was further investigated in contaminated air (NOx = 20 ppm). The results indicated that the prepared TiO 2 -RGO/LDHs nanocomposite possess better photodegradation activity than pure TiO 2 and TiO 2 -RGO samples, and the photocatalyst has excellent application for the elimination of three kinds of VOCs. The photochemical and materials characterization revealed that the graphene has enlarged the light response range and inhibited the recombination of electron-hole pairs of TiO 2 . Meanwhile, LDHs can offer more hydroxide ions to accelerate the oxidation reaction, resulting in more radicals and better pollutants degradation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Energy Advances
·
2023
·Vol. 2
·期 9
·1366-1374
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IF 0
Zhengzhe Xie,Xiaoyuan Liu,Pengpeng Jia,Yu Zou,Jiang Jiang
Replacing water oxidation by the thermodynamically more favorable glycerol oxidation reaction in a photoelectrochemical (PEC) cell is highly desirable, which can not only improve the energy efficiency of hydrogen evolution, but also produce value-added chemicals, given that glycerol is easily accessible as a major byproduct from the biodiesel industry. Herein, a BiVO4/CoV-LDHs/Ag photoanode has been fabricated via a simple electrodeposition and redox strategy, which exhibits excellent PEC activity toward glycerol oxidation. A high photocurrent density of 7.15 mA cm−2 can be achieved at 1.23 V vs. reversible hydrogen electrode, in 0.5 M Na2SO4 solution with 0.1 M glycerol under AM 1.5G illumination, which is 2.7 times that of the pristine BiVO4 photoanode. The significantly enhanced PEC performance can be attributed to the narrowed optical band gap, and improved charge separation and injection efficiencies after surface deposition of CoV-LDHs/Ag on the BiVO4 photoanode. As a result, greatly improved hydrogen production efficiency has been achieved by coupling the photo-electrochemical glycerol oxidation on the BiVO4/CoV-LDHs/Ag photoanode, with the evolved hydrogen gas (123.5 mmol m−2 h−1) nearly double that when using the pristine BiVO4 photoanode.
研究领域:
材料科学
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电化学
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可再生能源
✓ 已验证
DOI
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2020
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IF 3.442
Jun Wang,Xiaofang Lei,Cong Huang,Lian Xue,Wei Cheng,Qiang Wu
Herein, a novel MoO 3 /Zn–Al LDHs composite photocatalyst was successfully prepared. Morphology, chemical composition, and photoelectrochemical properties of the prepared catalyst were explored by different characterization methods, including X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), Brunauer Emmett-Teller (BET), UV–Vis diffuse reflectance spectrometry (DRS) and Electron Spin Resonance (ESR). Using tetracycline as a target pollutant, the photocatalytic activity of MoO 3 (10 wt%)/Zn–Al LDHs composite was tested by photodegradation of tetracycline under visible light irradiation. The experimental results indicate that the MoO 3 (10 wt%)/Zn–Al LDHs composite exhibited higher photocatalytic removal efficiency than pure Zn–Al LDHs and MoO 3 . The removal efficiency of TC in 60 min could reach 90.5%. It was confirmed that the optimal conditions were a catalyst dosage of 1.0 g/L, an initial pH of 9, and an initial concentration of TC of 40 mg/L. In addition, a possible mechanism for the photodegradation of TC with MoO 3 (10 wt%)/Zn–Al LDHs composite was proposed. The introduction of MoO 3 facilitates the separation of electron-hole pairs. It could be seen that the MoO 3 (10 wt%)/Zn–Al LDHs composite has great application prospects for the treatment of antibiotic wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2022
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IF 5.479
Qinglong Luo,Mingzhe Dong,Quan Li,Zhijian Wu,Zhong Liu,Jun Li
The selective extraction of lithium from brine by lithium aluminum layered double hydroxides (Li/Al-LDHs) adsorption is used industrially. To maintain the structural and performance stability of the Li/Al-LDHs adsorbent, the Li/Al-LDHs adsorbent can be doped with some high electron density metals such as Fe(III) and regenerated by dilute Li-containing aqueous solution. In this study, we use Fe(III) doping and FeOOH nanocomposite to stabilize the structure of Li/Al-LDHs. The nanocomposites of Li/Al-LDHs, Fe dopped Li/Al-LDHs (Fe-Li/Al-LDHs), and FeOOH were synthesized by the phase-separated sol–gel method and granulated by using crosslinked alginate polymers. The nanocomposites and granulated nanocomposites were characterized by SEM, TEM, XPS, FT-IR, and XRD analyses. The adsorption–desorption performance of the granulated nanocomposites was evaluated with a single LiCl solution and the brine from Da Qaidam Salt Lake. The isotherms, kinetics, and thermodynamics parameters and Arrhenius parameters of the lithium adsorption of the granulated nanocomposites were obtained. At the 80% mass loading of the nanocomposites in the granulation, the granulated nanocomposites statically adsorbed 9.46 mg/g lithium and dynamically 8.18 mg/g lithium from Da Qaidam Salt Lake brine. The Fe(III) doping and nanocomposite with FeOOH reduced the dissolution of the Li/Al-LDHs in the granulated nanocomposites and did not negatively affect the adsorption capacity of the granulated nanocomposites.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 21
·6879
·
IF 3.4
Yuquan Wang,Yidong Xu,Xinjie Cai,Jinting Wu
Adsorption and photocatalysis are effective in removing organic pollutants from wastewater. This study is based on the memory effects of MgAl–layered double hydroxides (MgAl–LDHs) after high-temperature calcination. By introducing bismuth vanadate (BiVO4) during the reformation of the layered structure via contact with water, a composite material BiVO4/MgAl–LDHs with enhanced adsorption and visible light catalytic performance was synthesized. The effects of the calcination temperature, ratio, initial methylene blue (MB) concentration, and catalyst dosage on the adsorption and photocatalytic performance were investigated. The BiVO4/MgAl–LDHs showed better photocatalytic performance than the pure BiVO4and MgAl–LDHs. Under the optimal conditions, the proportion of MB adsorbed in 20 min was 66.1%, and the percentage of MB degraded during 100 min of photolysis was 92.4%. The composite photocatalyst showed good chemical stability and cyclability, and the adsorption-degradation rate was 86% after four cycles. Analyses of the adsorption and photocatalytic mechanisms for the composite material showed that synergistic adsorption and visible light photocatalysis contributed to the excellent catalytic performance of the BiVO4/MgAl–LDHs. A highly adsorbent photocatalytic composite material exhibiting outstanding performance was prepared via a simple, cost-effective, and environmentally friendly method, providing reference information for the removal of organic pollutants from liquids.Keywords:BiVO4;MgAl–LDHs;memory effect;adsorption-visible photocatalytic performance;organic pollutants
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 19
·2000831
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IF 4.948
Zhilin Zhao,Xinming Wu
Multifarious layered electrode materials are attracting increased attention in the field of energy storage because of their high specific surface and interlayer modifiability. However, the natural tendency to be re-superimposed and the inherent disadvantages of a single layered electrode significantly affect electronic transport and ion migration. Considering the poor electrochemical performance and low structural stability, a novel MXene@PDDA/NiAl-LDHs hybrids as supercapacitor electrode via an electrostatic-assembled approach is elaborately designed. The alternate MXene and PDDA/NiAl-LDHs layers with 3D interconnected networks architectures could ensure intimate contact to efficiently take advantage of high electron conductivity of MXene and high pseudocapacitance activity of PDDA/NiAl-LDHs, thus effectively accelerating the ionic/electronic transport rates and improving the electrochemical storage of hybrid electrodes. As a consequence, as an electrode for supercapacitor, the MXene@PDDA/NiAl-LDHs exhibits a high specific capacitance of 1825.8 F g −1 at a current density of 1.0 A g −1 , a remarkable synergetic effect, leading to a high rate capability after 100 cycles at different current densities and long cycling stability with only 0.9% degradation after 5000 cycles at 5.0 A g −1 . This work provides a strategy for 2D layered materials to design electrodes with excellent electrochemical performance in the field of energy storage.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Man Wang,Jun Wang,Mengjun Li,Xinru Wang,Yating Sima,Qiang Wu
Hexagonal Zn–Al hydrotalcite (Zn–Al LDHs) has become a research hotspot in the field of photocatalysis due to efficient photocatalytic performance, low cost and non-toxicity. In this research, In 2 S 3 /Zn–Al LDHs composites were firstly synthesized by one-pot method with InCl 3 and TAA as raw materials. The crystalline structure, surface morphology , chemical composition, together with optical properties of the samples were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (FT-IR), UV–Vis diffuse reflectance spectrometry (DRS), and Photoluminescence spectra (PL). The photocatalytic performance of the composite photocatalyst was investigated by degradation of tetracycline (TC) under visible-light irradiation. The photochemical properties and cyclic stability of the photocatalyst were further explored. Experimental results display that the photocatalytic efficiency of In 2 S 3 /Zn–Al LDHs (1:2) was remarkably superior to that of pure In 2 S 3 and Zn–Al LDHs. In 2 S 3 /Zn–Al LDHs (1:2) composite showed high photocatalytic activity for TC degradation (92.2% within 30 min). The modification of Zn–Al LDHs by In 2 S 3 prompted the separation of photogenerated electron-hole pairs and thus improved the photocatalytic performance. It can be inferred that the efficient photocatalytic performance of In 2 S 3 /Zn–Al LDHs composites could remove many hazardous pollutants in wastewater.
研究领域:
环境科学
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材料科学
✓ 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）