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
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化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 19
·2000831
·
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
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Hui-Min Zhao,Wei-Peng Jia,Rui Dang,Xiang-Rong Ma,Yang Ma,Shuang-Yu Li,Xin Han,Nai-Cai Xu,Yu-Hong Kang,Yong Gao,Hua-Rui Hao,Rui Bai,Zhi-Fang Zhang,Cui-Ying Lu
s The development of a new type of photocatalyst for multiple deep degradation of phenol in wastewater together with the elucidation of the method for this process are highly significant in the treatment of sewage. In this report, three-dimensional heterostructured La(OH)CO 3 /NiAl-LDHs composite catalysts were prepared by loading ultrathin NiAl-LDHs onto La(OH)CO 3 substrates using a hydrothermal synthesis method and an in-situ growth technique. Photocatalytic experimental studies showed that La(OH)CO 3 /NiAl-LDHs could remove up to 97 % of (degrade) phenol from water, which was 5.86 and nearly two-fold greater than pure NiAl-LDHs and La(OH)CO 3 . Even after 5 cycles, La(OH)CO 3 /NiAl-LDHs still sustains an excellent photocatalytic stability (93.6 % phenol degradation). Fabrication of ultrathin NiAl-LDHs greatly enhanced the surface expanse of the composites from 1.442 m 2 /g to 140.16 m 2 /g, exposing more active sites. According to the in-situ XPS analysis under irradiation and the capture of active species on La(OH)CO 3 /NiAl-LDHs, the electrons would be transferred from La(OH)CO 3 to ultrathin NiAl-LDHs. The S-type heterointerfaces formed at the La(OH)CO 3 substrate with ultrathin NiAl-LDHs nanosheets effectively inhibited carrier complexation and improved the catalytic performance. Meanwhile, the formation of oxygen vacancies between La(OH)CO 3 and NiAl-LDHs further enhanced the photocatalytic activity. The photocatalytic degradation mechanism of phenol showed that the main radicals of this catalytic reaction were •O 2 - and •OH. The three-dimensional stratified staging engaged with La(OH)CO 3 and the ultrathin NiAl-LDHs mixed nanosheet faces offered a new path to advance superlative catalysts to treat sewage.
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 HAZARDOUS MATERIALS
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2020
·
IF 9.038
Yang Wang,Lei Zhang
In this paper, we report a new type of 3D ZIF-8@NiAl-LDHs micro-flowers material consisting of sandwich-like structured 2D nanopetals (highly compact ZIF-8 film anchored on both sides of petals). ZIF-8 was successfully incorporated into NiAl-LDHs (ZIF-8@NiAl-LDHs) via seeding strategy directed growth of ZIFs on the surface of LDHs nanopetals. The coating of ZIF-8 significantly increased the adsorption ability to organic pollutants and inorganic cation. 3D ZIF-8@NiAl-LDHs with excellent enrichment and filtration properties has been exploited for the application in water purification, and exhibit superior high adsorption rate and adsorption efficiency of organic (nonsteroidal anti-inflammatory drugs: ketoprofen, flurbiprofen, indometacin and ibuprofe; anionic dyes: congo red, orange g; cationic dyes: methylene blue, rhodamine b) and inorganic cation (Cu 2+ , Pb 2+ ) residues due to their novel hierarchical and submicroscopic structures. Further, 3D ZIF-8@NiAl-LDHs as filter membrane to extraction four kind of trace anti-inflammatory drugs followed by direct quantification detection of targets with HPLC was demonstrated. The validated method was successfully applied for analysis of four anti-inflammatory drugs in environmental water and human urine samples. This work provided a feasible way to design and construct purification materials for wastewater treatment and contaminant detection.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
·
IF 7.489
Guorong Wang,Zhiliang Jin,Weixin Zhang
Improving conductivity of electron and ion was considered to be the significant tendency on pseudocapacitive materials. In this work, a flower-like P-NiAl LDHs electrode materials have been successfully fabricated by hydrothermal synthesis and subsequent phosphatized treatment. Owing to the presence of phosphide, the resulting P-NiAl LDHs electrode showed a high specific capacitance of 2159F g −1 at 1 A g −1 and a good capacitance retention of 85.6% at 20 A g −1 , which more excellent than NiAl LDHs electrode. Besides, the P-NiAl LDHs//AC asymmetric supercapacitor exhibited a high energy density of 79.3 Wh kg −1 under a power density of 1033.6 W kg −1 and an acceptable stability of 73.6% specific capacitance retention after 2400 charge-discharge cycles. Consequently, the P-NiAl LDHs nanoflower is one of the better candidates for assembling supercapacitor, and this phosphatized method is a kind of facile and desirable strategies to improve the electrochemical characteristics of LDH-based supercapacitor materials .
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 RARE EARTHS
·
2025
·
IF 7.2
Hao Pan,Zhen Yan,Huihui Cao,Yifei Ye,Jing Zhao,Siyuan Qu,Guangtong Hai,Xiubing Huang
The valorization of 5-hydroxymethylfurfural (HMF) offers a sustainable pathway to address escalating global energy demands, making the design of efficient electrocatalysts for HMF oxidation reaction (HMFOR) a critical research priority. In this study, we synergistically integrated cationic defect engineering and Ce doping to optimize layered double hydroxides (i.e., NiAl-LDHs) for efficient HMFOR. The experimental results show that the coexistence of Ce species and cationic defects synergistically modulates the electronic structure of Ni species, maximizing the exposure of active Ni sites while enhancing electrical conductivity. Furthermore, the introduction of Al 3+ vacancies and Ce 3+ /Ce 4+ redox pairs promotes the formation of high-valent Ni 3+ active species. This dual modification strategy significantly enhances HMFOR performance, with NiAlCe(3%)-LDH-E achieving benchmark metrics at 1.45 V RHE :100% HMF conversion, nearly 100% 2,5-furandicarboxylic acid yield, and nearly 99% Faradaic efficiency. Density functional theory (DFT) calculations validate that cationic defects and Ce doping cooperatively optimize HMF adsorption at active surface centers and reduce the energy barrier for the rate-determining *HMF dehydrogenation to *HMF-to-5-hydroxymethyl-2-furancarboxylic acid (*HMFCA) step, providing atomic-level insights into the enhanced catalytic mechanism.
研究领域:
电催化
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材料科学
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可持续能源
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绿色化学
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密度泛函理论
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Zhilin Zhao,Xinming Wu,Chunyan Luo,Yidan Yang
To address the limitations of flexible asymmetric supercapacitor (FASC) with poor stability and low capacitance, highly electrochemically active materials and rational structural design are urgently needed. Herein, a lamellar interwoven heterostructure of NiAlP/NiAl-LDHs@MXene composite electrode with high capacitance and cycling stability was fabricated by hydrothermal reaction and electrostatic assembly. As a result, the NiAlP/NiAl-LDHs@MXene hybrid electrode delivers a high specific capacitance of 3.88 F cm −2 (2589.3 F g −1 ) and excellent cycling stability (91.1% capacity retention after 8000 cycles) at 1.0 mA cm −2 . In addition, the fabricated NiAlP/NiAl-LDHs@MXene//AC FASC exhibits a higher power density of 1800 W kg −1 at the energy density of 81.1 Wh kg −1 . It is worth noting that FASC still exhibits good structural integrity and outstanding stability (96.9% capacity retention after 10000 cycles) after being folded at different angles. Comparative experiments and density functional theory (DFT) reveal that the synergistic effect of NiAlP@NiAl-LDHs and Ti 3 C 2 Cl 2 MXene can provides a large number of hierarchical channels and generates more active sites, which accelerates the rapid migration of electrons and ions during charge and discharge. This work not only provides a promising electrode material for energy storage, but also opens a new idea for the selection of electrode materials for flexible wearable electronic devices.
研究领域:
材料科学
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能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yutong Zhang,Huiming Wen,Wanrong Bu,Bin Liu,Zhenhao Xu,Ke Li,Man Zhao,Xiongfei Huang,Yuchen Wang,Kai Yan
The electrocatalytic upcycling of polyethylene terephthalate (PET) into value-added chemicals, coupled with hydrogen evolution, presents a promising approach to addressing plastic pollution and clean energy generation. However, achieving both high efficiency and long-term durability remains a significant challenge. To overcome this challenge, we developed tremella-like oxygen-deficient NiAl layered double hydroxides microflowers (NiAl-LDHs-Ov) for efficient valorization of PET and hydrogen production. In the PET-derived ethylene glycol (EG) oxidation, compared with pristine NiAl-LDHs, the NiAl-LDHs-Ov catalyst exhibited an expanded (003) interplanar spacing (0.92 nm), offering more accessible active sites, along with a higher concentration of oxygen vacancies with 5.76 × 10 14 spin g −1 . Thus the NiAl-LDHs-Ov catalyst achieved 94.9 % EG conversion, 91.1 % FA selectivity, and 96.5 % FA Faradaic efficiency at 1.57 V vs. RHE within 3 h, outperforming pristine NiAl-LDHs. A combination of in situ and ex situ techniques revealed that abundant oxygen vacancies serve as Lewis acid sites to significantly facilitate the formation of OH* intermediates, thereby promoting the adsorption of C O bonds in EG and accelerating the desorption of C O bonds in FA. Moreover, the integrated NiAl-LDHs-Ov(+)||FeSi(−) system exhibited outstanding durability, sustaining high performance for over 400 h, outperforming previously reported systems (~100 h). An economic assessment estimated a revenue of approximately $2335.1 per ton of PET processed, highlighting its potential for practical application. This study underscores the critical role of oxygen vacancies in designing efficient non-precious metal catalysts for electrocatalytic upcycling of PET plastic wastes.
研究领域:
环境科学技术
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电催化
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材料化学
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塑料废弃物回收
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Science China-Materials
·
2022
·Vol. 65
·期 7
·1805-1813
·
IF 8.64
Wang Yuchen,Liu Yaoyu,Zhang Man,Liu Biying,Zhao Zhiyue,Yan Kai
Nickel-based layered double hydroxides (LDHs) are promising electrode materials in the fields of energy storage (supercapacitors) and conversion (urea oxidation). The rational construction of atomic and electronic structure is crucial for nickel-based LDHs to realize their satisfactory electrochemical performance. Herein, we report a facile, ecofriendly, one-step synthesis process to construct petal-like oxygen-deficient NiAl-LDH nanosheets for hybrid super-capacitors (HSCs) and urea oxidation reaction (UOR). The asprepared NiAl−LDH nanosheets with rich oxygen vacancies possess a large specific surface area of 216.6 m 2 g −1 and a desirable electronic conductivity of 3.45 × 10 −4 S cm −1 to deliver an ultra-high specific capacitance of 2801 F g −1 (700 C g −1 ) at 1 A g −1 . Furthermore, high specific energy of 50.0 W h kg −1 at 400 W kg −1 and excellent cycle stability with 91% capacitance retention after 10,000 cycles are achieved by the NiAl-LDHs/CFP (carbon fiber paper) (+)//YP-80F (a commercial activated carbon) (−) HSC. Besides, NiAl−LDH nanosheets also work as an efficient electrocatalyst for UOR, which only requires 1.42 V vs. reversible hydrogen electrode to drive 10 mA cm −2 in 1 mol L −1 KOH with 0.33 mol L −1 urea. This remarkable performance is superior to most reported values of previous candidates owing to the thin structure of NiAl−LDH nanosheets for exposing more active sites and abundant oxygen vacancies. In addition, various reaction parameters are investigated to optimize the electrochemical performance. In general, this work paves a new way for the architecture of multifunctional nanostructured energy materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
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