ChemSusChem
·
2022
·Vol. 15
·期 7
·e202200184
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IF 9.14
Siyong Ou,Min Zhou,Wen Chen,Yuyao Zhang,Yueli Liu
Graphical Photocatalytic CO 2 reduction : A COF-5/CoAl-layered double hydroxide (LDH) heterojunction photocatalyst is developed for the CO 2 reduction reaction. CoAl-LDH incorporation enhances the visible-light response-ability of the photocatalyst and improves the separation efficiency of photogenerated electron–hole pairs through the role of a type-II heterojunction. Photocatalytic conversion of CO 2 into value-added chemical fuels is an attractive route to mitigate global warming and the energy crisis. Reasonable design of optical properties and electronic behavior of the photocatalyst are essential to improve their catalytic activity. Herein, the 1D/2D heterojunction by direct in-situ synthesis of the covalent organic framework (COF)-5 colloid on the surface of CoAl layered double hydroxide (LDH) was used as the prospective photocatalyst for CO 2 reduction. COF-5/CoAl-LDH nanocomposite achieved 265.4 μmol g −1 of CO with 94.6 % selectivity over CH 4 evolution in 5 h under visible light irradiation, which was 4.8 and 2.3 times higher than those of COF-5 colloid and CoAl-LDH, respectively. The enhanced catalytic activity was derived from the increased visible-light activity and the construction of type II-2 heterojunction, which greatly optimized visible light harvesting and accelerated the efficient separation of the photoinduced holes and electrons. This work paves the way for rational design of heterojunction catalysts in photocatalytic CO 2 reduction.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Shouli Bai,Shiyu Jia,Yingying Zhao,Pinggui Tang,Yongjun Feng,Ruixian Luo,Dianqing Li,Aifan Chen
Ti-doped α-Fe2O3 nanorods were prepared by a facile hydrothermal method, followed by a NiFe-LDH catalyst that was electrodeposited on the doped α-Fe2O3 nanorods to structure an integrating photoanode Ti:Fe2O3/NiFe-LDH for improving solar PEC water-splitting efficiency. The structure and properties of electrode materials were characterized and the PEC properties of photoanodes were measured. The results show that the photocurrent density of the photoanode enhances 11.25 times at 1.23 V (vs RHE) and the IPCE value enhances 4.10 times at 420 nm compared with pristine α-Fe2O3. The enhancement is attributed to the separating of photogenerated electron–hole, the increase of carrier density, and the acceleration of the carrier transfer rate due to the dual action of doping and catalysis.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2015
·Vol. 26
·期 5
·495-501
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IF 1.757
Liang Xiong,Wei-De Zhang,Qing-Shan Shi,Ai-Ping Mai
Novel waterborne polyurethane (WPU) composites based on NiAl-LDH and ZnO were successfully synthesized by in-situ polymerization. The nanostructured NiAl-LDH/ZnO was first grafted by isophorone diisocyanate (IPDI), forming the NiAl-LDH/ZnO-NCO complex with ―NCO group on the surface, which promotes its homogeneous dispersion in WPU matrix. The microstructure and particle distribution of the composites were characterized. The mechanical properties and the water resistance of the composites were improved. Furthermore, the composites also exhibit significant antibacterial activity towards G(−) Escherichia coli and G(+) Staphylococcus aureus . Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xiaoyu Lu,Congling Li,Li Zhang,Wei Xia,Rui Liu,Aifeng Lv
The rational design of efficient, cost-effective, and durable electrocatalysts is crucial for the realization of hydrogen production through water splitting. The present study describes the synthesis of a novel three-dimensional (3D) volcano-like Fe 3 S 4 /Ni 3 S 2 /WO 3 /NiFe LDH/NF (Layered Double Hydroxides/Nickel Foam) electrocatalyst with a highly wrinkled structure through a two-step hydrothermal method. The as-synthesized electrocatalyst exhibits an exceptionally low overpotential of 77 mV for the hydrogen evolution reaction (HER) and 131 mV for the oxygen evolution reaction (OER) at a current density of 10 mA cm −2 , owing to the unique morphology and strong electronic interactions between Fe 3 S 4 , Ni 3 S 2 and WO 3 heterostructures. The Fe 3 S 4 /Ni 3 S 2 /WO 3 /NiFe LDH/NF electrocatalyst demonstrates exceptional performance in overall water splitting when employed as both anode and cathode, achieving a current density of 10 mA cm −2 at an impressively low cell voltage of 1.5 V as well as exhibiting remarkable durability with little degradation over a period of 12 hours. This study presents a straightforward approach for the synthesis of highly efficient and durable non-noble metal catalysts for overall water splitting under hydrothermal conditions.
研究领域:
材料科学
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电化学
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能源转换
✓ 已验证
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Fuwei Yang,Xilin Liu,Pengfei Liu,Jiayin Li,YiZhuo Wang,Jianrong Xue,Hu Zhou
In this work, a 2D-3D activator De@NiFe-LDH was constructed by in-situ growth of 2D NiFe layered double hydroxide (NiFe-LDH) on the surface of 3D diatomaceous earth (De). The analysis of SEM, XRD, FTIR, XPS and BET were used to characterize the samples. The as-prepared De@NiFe-LDH achieved 99.4 % removal of tetracycline hydrochloride (TC) via activation of peroxymonosulfate (PMS). Singlet oxygen ( 1 O 2 ) was verified as dominant reactive oxygen species responsible for TC removal via quenching tests. Mechanism investigation suggested that the redox cycles of Ni 2+ /Ni 3+ and Fe 2+ /Fe 3+ on the surface of De@NiFe-LDH were crucial for PMS activation. In addition, the reasonable reusability and versatility of De@NiFe-LDH as well as low-toxicity of treated water endowed the De@NiFe-LDH/PMS system with a wide range of applications.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Yi-fan Zhang,Xue-wei Wang,Zi-yu Zheng,Wen-hua Zhang,Xuan Liu,Jia-qian Niu
In response to the growing demand for clean, green, and sustainable energy sources, the development of cost-effective and durable high-activity overall water splitting electrocatalysts is urgently needed. In this study, the heterogeneous structure formed by the combination of FeCoNiP and FeNi-LDH was homogeneously dispersed onto CuO nanowires generated by in-situ oxidation of copper foam as a substrate using an electrodeposition method. This multilevel structure exhibits excellent bifunctional properties as an electrode material in alkaline solutions, for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) only 206 mV and 147 mV overpotentials are needed to achieve a current density of 100 mA cm −2 respectively. Full water electrolysis is thus enabled to take place at such a low cell voltage as 1.64 V to reach the current density of 100 mA cm −2 , which exhibits a long-term stability of 30 h. These improved electrocatalytic performances stem from the construction of multilevel structures. The X-ray photoelectron spectroscopy suggests that strong electron transfer occurs between heterogeneous structures, thus facilitating the OER and HER process. The dispersion of CuO nanowires not only increases the electrochemically active surface areas but also improves the overall hydrophilic and aerophobic properties. This work highlights the positive effect of multilevel structure in the design of more efficient electrocatalysts and provides a reference for the preparation of other low-cost, high-activity bifunctional electrocatalysts.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
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2025
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IF 4.8
Wenshuai Yang,Mingsheng Luo,Zhi Yang,Roshni Rahman,Ziyuan Li,Xiaoteng Cui,Lingman Xia
A highly dispersed FeCu/LDH-based catalyst precursor was prepared by co-precipitation method, and the catalysts promoted with Pd, Pt or Rh were then prepared using an equal-volume impregnation method to be used in syngas-to-alcohol reaction. These samples were characterized by XRD, Raman, FT-IR, In-situ DRIFT, XPS, SEM and N 2 adsorption desorption. The study reveals that the 2D nanosheet structure of the LDH precursor has a large surface area and evenly distributed active sites, leading to the superior catalyst performance. The promoted catalyst generated even higher catalytic activity and alcohol selectivity, notably reducing undesired methane and CO 2 by-products. Rh incorporation obviously enhanced the thermal stability of the catalyst, leading to the long-term retention of the LDH structure. Rich -OH groups offer surface basicity, thereby significantly enhancing its catalytic performance to lower the CO 2 selectivity to 1.34 % and methane to 1.67 % while achieving a remarkable alcohol selectivity of 95.1 %. In-situ DRIFT results reveal that Rh promotion helps balance the gaseous adsorption and bridge adsorption of CO for improved overall syngas-to-alcohols reaction results.
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 7
·3650-3658
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IF 5.8
Jun Tang,Jinzhao Huang,Sixuan Zhang,Zehui Liu,Jing Xiao
Although molybdenum disulfide (MoS2) has garnered significant interest as a potential catalyst for the oxygen evolution reaction (OER), its poor intrinsic activity and few marginal active spots restrict its electrocatalytic activity. Herein, we successfully constructed a catalyst via a simple hydrothermal method by forming a heterostructure of MoS2 with Cr-doped nickel–iron hydroxide (NiFe LDH) to synthesize a MoS2/NiFeCr LDH catalyst to significantly improve the OER catalytic performance. MoS2 plays a crucial function as an electron transport channel in the MoS2/NiFeCr LDH heterostructure, which increases the electron transport rate. Furthermore, a larger active surface area for NiFeCr LDH is provided by the ultrathin layered structure of MoS2, increasing the number of active sites and encouraging the OER. On the other hand, the introduction of Cr element increased the density of the catalytic center and provided additional Cr-OH active sites, which accelerated the oxygen decomposition reaction. These two factors act synergistically to improve the intrinsic structure of MoS2, increase the number of reactive sites, and dramatically enhance the OER catalytic performance. Excellent OER activity is demonstrated by the MoS2/NiFeCr LDH catalyst, which only needs an overpotential of 224 mV to obtain a current density of 10 mA cm−2 and a Tafel slope of 61 mV dec−1. The catalyst also demonstrated outstanding stability, with its activity practically holding steady after 48 h of testing. This work offers novel ideas for enhancing and designing MoS2-based OER catalysts, and it provides a crucial reference for research in the field of clean energy.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yixing Luo,Yang Yang,Yakun Tian,Qingsheng Wu,Wen-Feng Lin,Ming Wen
Transition-metal based layered double hydroxides (TM-LDHs) have attracted widespread attention due to their advantages for the electrocatalytic oxygen evolution reaction (OER). However, their sluggish and unstable reconstruction during the OER has seriously limited their applications in water electrolysis at industrial-level current density. Herein, FeOOH/FeNiCo-LDH heterogeneous nanosheets (2.1 nm in thickness) are uniformly integrated on honeycomb-channel N-doped carbon (FeOOH/FeNiCo-LDH/HCNC) through a self-sacrificing and dual-ion etching strategy. Thermodynamically favoured hydrogen/electron-capturing ability of FeOOH together with kinetically favoured rapid mass/electron transfer efficiency of conductive HCNC collaboratively accelerates the reconstruction of FeNiCo-LDH to generate highly active and stable FeNiCoOOH species, which displays an optimal reaction pathway with reduced energy barrier for the OER. Consequently, FeOOH/FeNiCo-LDH/HCNC exhibits superior OER activity in both alkaline freshwater (η10 = 258 mV with Tafel slope of 32.4 mV dec−1) and alkaline natural seawater (η10 = 296 mV with Tafel slope of 54.7 mV dec−1). When applied in anion exchange membrane electrolyzer as OER electrocatalyst, FeOOH/FeNiCo-LDH/HCNC achieves outstanding stability with low cell-voltage increase rates of 1.7 mV h−1 (freshwater) and 1.5 mV h−1 (seawater) over 120 h at the industrially required current density of 500 mA cm−2. This study proposed an ingenious reconstruction strategy for advanced TM-LDH electrocatalysts toward industrial applications.
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
Journal of Energy Storage
·
2024
·
IF 8.9
Ye Qu,Yanzi Zhang,Yali Zhang,Jun Song,Zhaoen Liu,Weixing Rao,Yu Liu
The multi-component synergy of electrode materials and structural engineering are crucial for high-performance supercapacitors. Herein, a novel sandwich-like MXene@NiCo-layered double hydroxides (LDHs)/Co 9 S 8 nanostructure is rational synthesized, which with rich pores can significantly facilitate the diffusion of electrolyte ions and boost high charge transfer capability. Besides, the interaction forces between components promote the integration of multidimensional materials, and the resulting hybrid structure significantly improves the electrochemical efficiency through synergistic effects. Remarkably, the obtained MXene@NiCo-LDH/Co 9 S 8 composites exhibit a high specific capacitance of 808.0 F g −1 at a low current density of 1 A g −1 , the value is nearly 1.4 times MXene@NiCo-LDH (586.2 F g −1 ), as well as good rate capability (512.0 F g −1 at 10 A g −1 ). Besides, the fabricated supercapacitor device (MXene@NiCo-LDH/Co 9 S 8 //activated carbon) showed an outstanding energy density of 96.4 Wh kg −1 at 800 W kg −1 ), and good cyclic performance of 70.26 % capacitance retention even over 9000 cycles. This research may provide a promising strategy for developing two-dimensional layered materials as an electrode material in energy storage applications.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yidan Luo,Puxin Xu,Chao Liu,Huiyin Ye,Ke Peng,Shuohan Yu,Mingshan Xue,Yu Xie,Luhui Wang
Constructing heterostructures is an effective method for enhancing photocatalytic efficiency. Herein, a two-dimensional (2D)/2D heterojunction of NiAl-LDH/BiOBr with a built-in electric field (BIEF) was firstly synthesized. The photocatalytic efficiency of CO 2 reduction was assessed under visible light. And the findings revealed that the composite with 10 wt% NiAl-LDH demonstrated the highest CO 2 photoreduction performance, yielding a rate of 10.7 μmol·g −1 ·h −1 for CO generation, which was 21.4 and 4.3 times higher than that of pure NiAl-LDH and BiOBr. The heterojunction of the sample was type-II heterojunction with the analysis of XPS, band structures, and in-situ XPS. Photoluminescence (PL) and electrochemical tests demonstrated that the type-II heterojunction between NiAl-LDH and BiOBr efficiently enhanced the separation and transfer of electrons and holes, consequently boosting the photocatalytic performance. Besides, in-situ diffuse reflectance infrared Fourier transform spectroscopy (in-situ DRIFTS) was employed to reveal the reaction intermediates of CO 2 . This work provides experimental approaches and theoretical development of nanocomposite for photoreduction of CO 2 .
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Chenyuan Guo,Shuguang Shen,Meina Li,Ying Wang,Jing Li,Yuanquan Xing,Cui Wang,Huajie Pan
A rapid and efficient synthesis strategy of MgAl-LDH was proposed. MgAl-LDH with high specific surface area was synthesized in situ by using η -Al 2 O 3 as carrier, and the synthesis time was greatly shortened by both increasing temperature and introducing ethanol as co-solvent. Besides, the growth process of MgAl-LDH on the surface of η -Al 2 O 3 is also revealed. Under optimized conditions, the specific surface area of the MgAl-LDH is as high as 172.4 m 2 /g, the crystalline size is as small as 12.82 nm, and the basicity can reach 1.795 mmol/g. The urea wastewater was degraded from 8000 mg/L to 6.85 mg/L over the catalyst synthesized by the rapid method, and the catalyst still maintains high activity after four uses. Also, it was found that there is a good linear relationship between the urea removal rate and the basicity of MgAl-LDH.
研究领域:
环境科学
·
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）