SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qiaoqi Li,Kun Dai,Pengfei Teng,Cheng Liu
Addressing dual environmental challenges of global red mud accumulation (>150 million tons/year globally) and lithium battery waste disposal, this study proposes an innovative “solid waste synergy and energy-field coupling” strategy. Utilizing Sc-rich red mud from Boshan bauxite (Shandong Provience, P. R. China) (containing Ca 2+ , Al 3+ , Fe 3+ , Ga 3+ , Sc 3+ ) synergistically with Co 2+ from battery liquid waste, we constructed high-entropy layered double hydroxide CoCaAlFeGaSc-LDHs via co-precipitation. The material exhibits broadband near-infrared absorption through Co 2+ d - d transitions, enabling instantaneous photothermal response under NIR laser irradiation and enhancing CH 4 conversion by 7.9-fold. Fe 3+ /Ga 3+ facilitates ultraviolet and visible-light harvesting, while Sc 3+ effectively suppresses the formation of hydroxyl (•OH) and superoxide (•O 2 − ) radicals. This synergistic mechanism significantly enhances both the CH 4 production yield (2.1×) and selectivity (reaching 89 %), driving the CO 2 reduction pathway efficiently along the critical intermediates •HCOO and •CH 3 O toward CH 4 formation. The ferromagnetism ( M s = 76.7 emu·g −1 ) enables the material to markedly enhance the separation and suppress the recombination of photogenerated charge carriers under a 500 mT magnetic field, which in turn leads to a substantial gain in photocatalytic efficiency. CH 4 yield reaches 36.8 μmol·h −1 ·g −1 —1.46-fold enhancement compared to non-magnetic field conditions. The terminal residue contains no residual heavy metal ions, and insoluble SiO 2 and TiO 2 can be safely returned to the environment, establishing a closed-loop solution for waste valorization while pioneering magnetic field-enhanced photothermal catalysis.
研究领域:
环境科学
·
材料化学
·
催化化学
·
资源循环利用
·
能源化学
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 3
·037502
·
IF 3.9
Jiazheng Zhang,Xiang Ji,Ningchen Ye,Haitao Zhang,Hao Sun,Chenzhe Xu,Lin Liu,Juanjuan Ma,Zhiwei Tong
In this study, we reported a facile and rapid synthesis of NiAl LDH/ERGO and reduced by electrochemical method. Compared with previous studies, this experiment greatly decreased the use of reductive solvents and was environmentally friendly. The nanocomposite material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) & transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectrometer (FT-IR). A series of electrochemical methods were applied to test the electrochemical performance of modified electrodes. When the modified electrode was used to detect AA, DA and UA, the three substances can be clearly separated and the limits of detection for AA, DA and UA can be 0.85 μM in the range 12.48–232 μM, 0.38 μM in the range 1.06–13.26 μM and 0.42 μM in the range 1.25–23.20 μM (S/N = 3), respectively. The modified electrode could provide a reproducible and stable platform to detect AA, DA, and UA simultaneously.
研究领域:
材料科学
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电化学
·
分析化学
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DOI
高影响因子
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
·
2023
·
IF 1.8
Yingxue Liu,Huijie Huangfu,Shuai Gao,Xugeng Guo,Li Wang
Herein, we prepare two types of MgAl-LDHs coatings single-doped by imidazolium ionic liquid 1-decyl-3-methylimidazolium bromide ([Demim]Br) or sodium dodecylbenzenesulphonate (SDBS) and double-doped by [Demim]Br and SDBS on AZ31B Mg alloy by using an in-situ hydrothermal treatment. Their surface morphology and corrosion resistance immersed in 3.5 wt-% NaCl solution are explored. Our results suggest that the double doping of [Demim]Br and SDBS will change the surface morphology of the coating and a uniform and dense film is observed in the double-doped MgAl-LDHs, which is denser than those of the two single-doped MgAl-LDHs coatings, thus providing a superior corrosion resistance. Such an improvement can be ascribed to the synergetic inhibition effect of [Demim]Br and SDBS against the corrosion of the Mg alloy substrate. More importantly, the charge transfer resistance of the sample coated with the double-doped MgAl-LDHs is still high after 3 d of immersion, benefiting from the excellent self-healing effect.
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 53
·48189-48198
·
IF 3.289
Wenzong Xu,Shaoqing Wang,Aijiao Li,Xiaoling Wang
A novel flame retardant containing both phosphorus and silicon elements, composed of aminopropyltriethoxysilane grafted/tripolyphosphate intercalated ZnAl LDHs (A-LDHs), was synthesized by anion exchange and IHS (induced hydrolysis silylation) method, and characterized by XRD, FTIR, XPS, and TG. After being added into a PUE matrix, A-LDHs could exfoliate and disperse randomly in the matrix while the composites containing pristine LDHs (N-LDHs) still preserved the stacking lamellar structure. Moreover, T5, T10, T50 and Tmax of the composites containing A-LDHs were higher than those of PUE/LDHs composites containing N-LDHs, resulting from the good dispersion of A-LDHs. And A-LDHs performed better in the flame retardancy and smoke suppression of PUE than N-LDHs. Furthermore, the mechanism was investigated through the analysis of the condensed phase after cone calorimetry tests via LRS, FTIR and XPS. The findings showed that the improved flame retardancy and smoke suppression might originate from a more stable char layer due to the introduction of P and Si elements.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 12
·e202300207
·
IF 8.4
Dewei Wang,Jiaqi Sun,Long Chen
Graphical NH 4 + storage : Structural reconstructed cobalt-iron layered double hydroxides featuring copious structure defects are reported as a high-capacity cathode for NH 4 + storage. The resulting sample can not only deliver a large reversible capacity but also act as the cathode for construction of ammonium-ion hybrid supercapacitors. Exploration of high-performance aqueous ammonium-ions hybrid supercapacitor has attracted tremendous research attention recently. Herein, structural reconstructed cobalt-iron layered double hydroxides (SR-CoFe LDHs) featuring copious structure defects (i. e., oxygen-vacancies, M−O bonds, MOO − bonds, coexistence of Co 2+ /Co 3+ and Fe 2+ /Fe 3+ ) are reported as a high-capacity cathode for NH 4 + storage. The resulting SR-CoFe LDHs can deliver a reversible capacity of 167.9 mAh g −1 at 0.5 A g −1 , which is 3.3 folds higher than that of pristine CoFe-LDHs. Ex-situ experimental results and theoretical studies denote that the presence of structural defects in the CoFe-LDHs can lower the NH 4 + adsorption energy and induced electron delocalization to enhance the electrical conductivity, rendering the CoFe-LDHs exhibits excellent performance for NH 4 + storage. As a proof of concept, ammonium-ion hybrid supercapacitor has been assembled with CoFe-LDHs as the cathode and hierarchical carbon as the anode, which can deliver a large specific capacitance of 238.3 F g −1 , long cycle stability over 10000 cycles, and high energy density of 66.2 Wh kg −1 within a wide working voltage of 2 V. Overall, this work offers some insights into the design of high capacity cathode for aqueous NH 4 + storage and also illustrates the construction of aqueous hybrid devices with NH 4 + as the charge carrier.
研究领域:
材料科学
·
电化学储能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Jiangfu Zheng,Yaocheng Deng,Changzheng Fan,Xiaoming Li,Daoxin Gong,Changwu Li,Ziyi Ye
The construction of an S-scheme heterojunction is an effective way to enhance the photocatalytic activity of composite materials. Thus, a co-precipitation method is combined with a hydrothermal synthesis method in this study to synthesize an S-scheme heterojunction of Bi 2 WO 6 /Ag 3 PO 4 /Zn-Al LDH photocatalyst with an exceptional morphology like a coral reef. On this basis, an AP0.5BWLDH0.3/PMS/Vis reaction system is constructed. The prepared Bi 2 WO 6 /Ag 3 PO 4 /Zn-Al LDH composites present better oxidation performance than pure Bi 2 WO 6 , Zn-Al LDH and Ag 3 PO 4 , with 100% Nitenpyram (50 mg/L) degraded within 90 min due to the photocatalytic activation of peroxymonosulfate. The significant increase in photocatalytic activity is not only due to the uniformly distributed coral reef-shaped nanostructures but also the extended life of the carrier with strong redox capability through S-scheme heterojunction. During the simulated exposure to sunlight, the internal electric field, optimized energy band structure, as well as coulomb force interaction all contributed to the promotion of the transportation of electron-hole pairs in the Bi 2 WO 6 /Ag 3 PO 4 /Zn-Al LDH composite. For this reason, electrons and holes have high reducing and oxidizing properties, which make the composites have high redox capacity. Then the radical trapping experiments, ESR testing and XPS analysis were used to verify these results. It was revealed that the S-scheme heterojunction mechanism was suitable for the electron migration in a photocatalyst. This study extends the design and preparation ideas of new S-scheme heterojunction photocatalysts and then proposes effective strategies to solve future water pollution .
研究领域:
环境科学
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材料科学
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光催化
·
水处理
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 18
·14085
·
IF 5.6
Yue Wu,Guangyuan Lu,Ping Xu,Tian C. Zhang,Huaqiang He,Shaojun Yuan
The pursuit of superhydrophilic materials with hierarchical structures has garnered significant attention across diverse application domains. In this study, we have successfully crafted Ni-Mn LDHs@CuC2O4nanosheet arrays on a copper mesh (CM) through a synergistic process involving chemical oxidation and hydrothermal deposition. Initially, CuC2O4nanosheets were synthesized on the copper mesh, closely followed by the growth of Ni-Mn LDHs nanosheets, culminating in the establishment of a multi-tiered surface architecture with exceptional superhydrophilicity and remarkable underwater superoleophobicity. The resultant Ni-Mn LDHs@CuC2O4CM membrane showcased an unparalleled amalgamation of traits, including superhydrophilicity, underwater superoleophobicity, and the ability to harness photocatalytic forces for self-cleaning actions, making it an advanced oil-water separation membrane. The membrane’s performance was impressive, manifesting in a remarkable water flux range (70 kL·m−2·h−1) and an efficient oil separation capability for both oil/water mixture and surfactant-stabilized emulsions (below 60 ppm). Moreover, the innate superhydrophilic characteristics of the membrane rendered it a prime candidate for deployment as a supercapacitor cathode material. Evidenced by a capacitance of 5080 mF·cm−2at a current density of 6 mA cm−2in a 6 M KOH electrolyte, the membrane’s potential extended beyond oil-water separation. This work not only introduces a cutting-edge oil-water separation membrane and supercapacitor electrode but also offers a promising blueprint for the deliberate engineering of hierarchical structure arrays to cater to a spectrum of related applications.Keywords:superwetting mesh;self-cleaning;oil/water separation;supercapacitors
研究领域:
材料科学
·
环境工程
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Fundamental Research
·
2022
·
IF 0
Yingjie Song,Shan Jiang,Yeheng He,Yu Wu,Xin Wan,Wenfu Xie,Jingjing Wang,Zhenhua Li,Haohong Duan,Mingfei Shao
The electrochemical oxidation of biomass molecules coupling with hydrogen production is a promising strategy to obtain both green energy and value-added chemicals; however, this strategy is limited by the competing oxygen evolution reactions and high energy consumption. Herein, we report a hierarchical CoNi layered double hydroxides (LDHs) electrocatalyst with abundant Ni vacancies for the efficient anodic oxidation of 5-hydroxymethylfurfural (HMF) and cathodic hydrogen evolution. The unique hierarchical nanosheet structure and Ni vacancies provide outstanding activity and selectivity toward several biomass molecules because of the finely regulated electronic structure and highly-exposed active sites. In particular, a high faradaic efficiency (FE) at a high current density (99% at 100 mA cm −2 ) is achieved for HMF oxidation, and a two-electrode electrolyzer is assembled based on the Ni vacancies-enriched LDH, which realized a continuous synthesis of highly-pure 2,5-furandicarboxylic acid products with high yields (95%) and FE (90%).
研究领域:
电化学
·
催化
·
绿色能源
·
化工
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产品关联
DOI
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 28
·13228-13234
·
IF 3.3
Yuanyi Wu,Shihan Liu,Yumei Xiao,Qian Li,Qin Xiang,Xianqin Song,Shanglin Wu,Kaiyong Wang,Yi Yang
Accurate detection of DNA is critical for biomedicine and food safety. Layered double hydroxides (LDHs) are a class of two-dimensional layered materials that have received extensive attention in the fields of sensors, catalysis, and materials science. The application of LDHs in DNA sensing in turn represents a fascinating topic. In this study, we found that both 6-carboxyfluorescein (FAM)-modified single-stranded DNA (ssDNA) probes and probe/target double-stranded DNA (dsDNA) duplexes could be adsorbed by LDHs, which resulted in high fluorescence quenching (>95%) for the first time. Based on the extraordinarily high quenching efficiency of LDHs, we developed a fluorescent sensing platform for simple and highly efficient detection of DNA, using Ni/Al-LDHs as fluorescence quenchers. For the selective degradation of dsDNA, exonuclease III was integrated into the sensor. In the sensing platform, the fluorescence of the probes was rapidly quenched by Ni/Al-LDHs. In the presence of the target DNA, dsDNA was formed, which was subsequently selectively degraded by exonuclease III into short fragments, resulting in the maintenance of the fluorescence of FAM labels. The linear range was 10–400 nM. The detection limit was 1.38 nM. This sensor accomplished the detection of target DNA within 50 min. It provides a convenient, rapid and versatile sensing platform for DNA biomarkers.
研究领域:
生物医学工程
·
材料科学
·
分析化学
·
生物传感器
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DOI
高影响因子
Catalysts
·
2026
·Vol. 16
·期 6
·494
·
IF 4.5
Zijie Chen,Jinyang Chen
A series of Mg-Al LDH-based photocatalysts were synthesized via a one-pot steam-assisted method, including pure Mg-Al LDH (MA), Zn-In ion-exchange-modified Mg-Al LDH (MAZ), BiOCl-loaded pristine Mg-Al LDH (MAB), and Zn-In-modified Mg-Al LDH co-loaded with TiO2and BiOCl (MA/Zn-In/TiO2/BiOCl, MAZB). The one-pot synthesis facilitated the in situ intercalation and uniform loading of BiOCl/TiO2/Zn-In, while Zn2+/In3+modified the MA layers via ion exchange, leading to an expansion of the interlayer spacing. The innovation of this work is reflected in two aspects: first, all raw materials are added via a one-pot strategy to achieve in situ preparation of modified hydrotalcite; second, this synthetic route features simple post-treatment without complicated washing, pressure filtration, and other tedious operations. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and N2adsorption–desorption isotherms. The bismuth chloride oxide/TiO2/LDHs exhibited a layered structure, with the active components uniformly distributed between the layers and on the MA surface. Under simulated sunlight irradiation, MAZB achieved 97.5% degradation of 20 mg/L MB within 120 min, with an apparent rate constant of 0.0297 min−1, which is 7.2 times, 2.4 times, and 2.9 times that of MA, MAZ, and MAB, respectively. The degradation rate of MAZB still remained at 89.5% after five cycles, demonstrating excellent stability and reusability. Compared with traditional hydrothermal methods, this steam-assisted system features mild reaction conditions (180 °C, atmospheric pressure), sodium-free raw materials, no washing requirement, and zero waste discharge, showing prominent green advantages.
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Chengliang Wang,Xia Guo,Jinbian Lv,Yin Zhang,Haitao Li,Jie Gao,Wei Wei,Di Zhang,Yongxiang Zhao
The primary products of the direct hydrogenation of Maleic Anhydride (MA) are Succinic Anhydride (SAH) and γ-butyrolactone (GBL). Achieving selective synthesis of these products by regulating the composition, structure, and textural properties remains a focal point in the research field of maleic anhydride hydrogenation. Based on the characteristic of atomic level uniform distribution of cations of layered double hydroxides (LDHs), a highly loaded, highly dispersed and homogenized NiCu alloy bimetallic catalyst was synthesized using NiCuAl-LDHs as precursor. Compared with Ni/Al 2 O 3 catalyst derived from NiAl-LDHs, the introduction of Cu can effectively improve the hydrogenation activity of C=C bonds while inhibiting the hydrogenolysis of C=O bonds. Under identical reaction conditions, the primary product of the Ni/Al 2 O 3 catalyst was γ-butyrolactone (GBL) with a yield of 94.2 %, whereas the primary product of the NiCu 0.4 /Al 2 O 3 catalyst was Succinic Anhydride (SAH) with a yield of 90.5 %. The introduction of Cu resulted in the formation of a homogeneous NiCu alloy phase in the catalyst, which significantly influenced the adsorption configurations and adsorption energies of the reactants and intermediates. This effect can be attributed to the electronic interactions between Ni and Cu, which shift the d-band center of Ni away from the Fermi energy level, thereby facilitating the directed synthesis of Succinic Anhydride (SAH) and γ-butyrolactone (GBL). These findings were confirmed by various characterization techniques and DFT theoretical calculations. Future catalyst development in maleic anhydride hydrogenation will significantly benefit from the design approach and research ideas presented in this study.
研究领域:
催化化学
·
材料科学
·
理论计算化学
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产品关联
DOI
高影响因子
Open Chemistry
·
2021
·Vol. 19
·期 1
·726-734
·
IF 1.554
Fengrong Zhang,Binghan Zhang,Dandan Han,Lishun Wu,Wanguo Hou
In this study, the nanocomposites from biomass (soybean straw) and layered double hydroxides (LDHs), denoted as B/LDHs, were fabricated using the mechanical-hydrothermal method. The obtained B/LDHs nanocomposites were characterized by TEM, SEM, FT-IR, and N 2 adsorption–desorption techniques. Adsorption of the heavy-metal ions Pb( ii ) on the B/LDHs was determined at 25°C and pH 6.0 using a batch technique. The experimental results demonstrated that biomass contributed to the sorption process. The pseudo-second-order, Langmuir, and Freundlich models well fitted the sorption process, indicating chemisorption and monolayer adsorption were the main adsorption mechanisms. Meanwhile, it is found that there is an obvious effect of adsorbent concentration in the studied adsorption system. In comparison with soybean straw and Mg–Al LDHs, the B/LDHs nanocomposites exhibit significantly enhanced sorption capacities. It is evident from this study that the construction of B/LDHs nanocomposites is an effective strategy for improving the sorption capacity of LDHs, and the modified LDH-based adsorbent shows a good potential in the removal of heavy metals from water. More importantly, it solves the problem of a large number of agricultural waste disposals. And, it achieved the goal of a win-win situation.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）