SOLID STATE SCIENCES
·
2014
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IF 1.679
Lijun Dong,Chunling Ge,Peiyong Qin,Yan Chen,Qinghong Xu
In this study, MgAl-LDHs (layered double hydroxides) intercalated with sodium dodecyl sulfate and outside surface modified with (3-aminopropyl)triethoxysilane (KH550) were prepared. The existence of organic part in LDHs improved immobilization efficiency and activity recovery of candida lipolytic lipase loaded. Also the positive charge in framework of LDHs was found to be beneficial to the enzyme immobilization. An immobilization efficiency of 56.4% and an activity recovery over 69.2% of the enzyme were obtained after it was loaded on the intercalated and modified LDHs, and catalytic activity of the immobilization can be kept at least five times. Moreover, the immobilized enzyme was found to have higher temperature resistance, wider pH value and better thermostability in reactive activity.
研究领域:
生物化学
·
酶工程
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DOI
高影响因子
MATERIALS TECHNOLOGY
·
2022
·
IF 3.297
Haoxin Li,Guangyu Wu,Qi Liu,Jingyi Wang,Siye Xia,Yingcen Xue,Jiangang Han,Chuansong Duanmu,Yongli Zhu
Wastewater contains dye or pharmaceuticals could imply severe environmental impacts due to their toxicity to ecosystems and, consequently, the generation of human health risks. In this work, the orange peel biochar was prepared through pyrolysis, and then Mg/Al-layered double hydroxide (Mg/Al-LDHs) was grown on the surface of the biochar (BC@Mg/Al-LDHs) by hydrothermal method. The material was characterised by SEM, TEM, XRD, XPS and other techniques. The adsorption performance, adsorption isotherms, kinetics and thermodynamics of BC@Mg/Al-LDHs on methylene blue (MB) or tetracycline hydrochloride (TC) were investigated. The results showed that the maximum adsorption capacity of BC@Mg/Al-LDHs for MB and TC were 75.98 and 29.08 mg/g, respectively. The adsorption equilibrium was reached within 30 minutes, and removal percent was 93.99 and 62.06% for MB and TC, respectively. The obtained results investigate that the prepared BC@Mg/Al-LDHs materials for a broad range of applications in dye and pharmaceuticals separation from the water environment.
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
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 31
·10547-10561
·
IF 6.4
Guorong Wang,Guiquan Liu,Zhiliang Jin
The vivacious surface chemistry and impressive electrical conductivity of MXene make it an alternative two-dimensional material for the storage of electrochemical energy. Herein, Ni-based layered double hydroxides (LDHs) were hydrothermal and grown in situ on Ti3C2 to form “sandwich-like” Ti3C2@LDHs. The synthesis of sandwich-like Ti3C2@LDHs enhanced the electrochemical reactivity and energy storage of Ti3C2, but also increased the electrical conductivity and cyclic stability of NiV-LDHs and NiCo-LDHs. The electrochemical properties of Ti3C2@NiV-LDHs and Ti3C2@NiCo-LDHs composite electrodes were greater than those of NiCo-LDHs, NiV-LDHs and Ti3C2, respectively. The optimal mass-specific capacitance of Ti3C2@NiV-LDHs was up to 1346.14 F g−1 (1 A g−1), and that of Ti3C2@NiCo-LDHs was 1120.07 F g−1 (1 A g−1), which is 1.6- and 1.5-times that of NiV-LDHs and NiCo-LDHs, respectively. A Ti3C2@NiV-LDHs//activated carbon (AC) asymmetric supercapacitor cell (ASC) manifested an energy density of 46.34 W h kg−1 (at 1530.61 W kg−1), and the specific capacitance could be maintained at 78.57% after 5000 charge–discharge cycles (10 A g−1). Ti3C2@NiCo-LDHs//AC ASC exhibited an energy density of 50.29 W h kg−1 (at 1522.65 W kg−1) with 81.82% specific capacitance retention after 5000 charge–discharge cycles (10 A g−1). Our results provide a procedure for improving the conductivity and stability of Ni-based LDHs using 2D MXenes in an aqueous asymmetric supercapacitor.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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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
Journal of Magnesium and Alloys
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2026
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IF 13.8
Dong Li,Tong Zhang,Shaosheng Jia,Jianan Yu,Rongbang Sun,Bin Yin,Liguo Wang,Lingchuang Bai,Lan Chen,Shaokang Guan
Osteosarcoma (OS) poses a severe threat to human health, and the standard clinical treatment involves prosthetic replacement after surgical removal combined with radiotherapy and chemotherapy. However, the recurrence of residual tumors and extensive bone defects leads to a poor prognosis for patients. Zoledronic acid (ZA) is clinically used for tumor treatment and osteoclast inhibition. Nevertheless, intravenous infusion of ZA has poor targeting and significant toxicity to normal tissues. Biodegradable Mg alloys have excellent mechanical and biological compatibility, making them ideal for orthopedic implants. However, their application is limited due to poor corrosion resistance. This work applied a multi-composite layered double hydroxide (LDH)-ZA/PDA coating to the surface of ZE21C alloy. The composite coating adsorbed ZA in weakly alkaline or neutral conditions and released ZA under near-infrared (NIR) irradiation in the tumor microenvironment (TME). The stimuli-responsive release of ZA was confirmed to be related to the NIR-TME-triggered change in LDH interlayer spacing. In vitro and in vivo experiments showed that this multi-composite coating improved corrosion resistance, responded to TME and NIR stimuli to release ZA and reactive oxygen species, effectively targeting and killing tumor cells and osteoclasts through the AKT/GSK-3β signaling pathway. It also transformed OS from “cold tumors” into “hot tumors”, reactivated macrophage-mediated tumor immunity, and promoted osteogenesis. The chemo-thermal-therapeutic approach of the composite coating achieves a “three-birds-with-one-stone” effect. This study offers new insights into applying Mg alloys in prosthetic replacements after OS surgery.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Dongdong Zhang,Binyuan Tang,Kai Wang,Lin Wang,Kai Tang,Shanliang Chen,Xiaoqiang Zhan,Hongli Yang,Weiyou Yang
Transition-metal-based layered double hydroxides (LDHs) are emerging as one of the most promising candidates with superior oxygen evolution reaction (OER) activity. However, their fabrication under mild conditions remains a significant challenge. Here, we propose a low-cost, high-production-rate strategy for controlled preparation of AlOOH/reduced graphene oxide (rGO) with strong adsorption capacity for transition metal cations, and then in-situ conversion to CoAl-LDH/rGO, NiAl-LDH/rGO and FeAl-LDH/rGO under ambient conditions. Based on Density Functional Theory calculations, it is witnessed that the rational electronic coordination between Co and Al enables the charge absorption by surrounding oxygen atoms, thereby playing a critical role in reducing the adsorption free energy and overpotential of OER intermediates toward efficient OER. Consequently, the resultant CoAl-LDH/rGO hybrids exhibit an overpotential of just 368 mV at the current density of 100 mA/cm 2 , with a low Tafel slope of 43.2 mV/dec. Moreover, under Air Mass 1.5 Global (AM 1.5G) illumination, their solar-to-hydrogen (STH) conversion efficiency of photoelectrochemical system achieves ∼ 11.61 %, with robust operation stability up to 24 h, demonstrating great potential for practical applications as advanced OER catalysts.
研究领域:
材料科学
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电化学
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理论计算
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
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IF 6.7
Shiyi Wang,Mingsheng Luo,Zhi Yang,Ziyang Zhang,Wenshuai Yang,Ziyuan Li,Xiaoteng Cui,Lingman Xia,Changke Shao
Using a citrate-assisted liquid phase co-precipitation method, a CuCoAl-LDH composite nanomaterial was successfully synthesized in situ on rGO and applied to alcohol synthesis for the first time. Structural characterization and morphological observations indicate that the hybrid material consists of hexagonal LDH nanosheets that are vertically aligned, crossed and densely distributed on the rGO surface. The graphene support significantly promoted the dispersion of LDH and prevented strong interlayer stacking during LDH crystal growth. After optimization of the Co/Cu ratio, the Cu 2 Co 1 /Al 2 O 3 /rGO catalyst exhibited a total alcohol selectivity of 60 %, of which 82 % were C 2+ alcohols, and no deactivation was observed after 100 h of reaction. The addition of the graphene support significantly reduced the particle size of the Cu-Co alloy on the catalyst surface, and the particles were highly dispersed on both the Al 2 O 3 matrix and the rGO surface. This dispersion facilitated strong interactions between the Cu-Co alloy particles, while the high thermal conductivity of graphene effectively suppressed the formation of hotspots. In addition, the well-ordered three-dimensional nanosheet structure of the LDH precursor provides a large specific surface area and highly uniformly dispersed active centers. This structure not only promotes the formation of bridge adsorption sites with high CO dissociation ability, which balances multiple bonding and bridge CO adsorption, but also significantly increases the probability of CO insertion, thereby enhancing the performance of HAS. This study provides an effective method for the preparation of LDH/rGO composites, demonstrating their broad potential application prospects.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
Journal of Environmental Sciences
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2026
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IF 6.5
Yafen Wang,Shiyu Chen,Rao Qi,Xiuyuan Fan,Yao Du
Layered double hydroxides (LDHs) and natural biofilms are both effective in controlling endogenous phosphorus (P) release in lakes, yet their synergistic mechanisms remain underexplored. In this study, ternary ZnAlLa-LDHs were synthesized via co-precipitation and applied as P-adsorbent coatings to access their interaction with natural biofilms under different light intensities (0, 2000 and 6000 lx). The presence of biofilms markedly reduced P release from P-loaded LDHs (63 mg/g), with reduction rates increasing from 52.6 % at 0 lx to 82.3 % at 6000 lx, highlighting the coupled influence of biofilm activity and illumination in suppressing P re-release. Biofilm physiological parameters, including chlorophyll a , dehydrogenase, and alkaline phosphatase activities, varied significantly with light intensity but were not adversely affected by LDH coatings, confirming their biocompatibility. Confocal laser scanning microscopy (CLSM) revealed that P-loaded LDH coatings promoted algal-derived EPS secretion by ∼60 % and enhanced structural stability, despite reducing direct bacterial–algal syntrophy under low-light conditions. Microbial community analysis further showed a stable consortium dominated by Ca. Competibacter, Thiobacillus, Desmodesmus and EPS-producing diatoms ( Aulacoseira, Navicula, Nitzschia ), indicating that controlled P release from LDHs fostered community balance and suppressed opportunistic taxa. P uptake followed a negative exponential model ( R 2 > 0.7) across initial P concentrations (0.04–0.25 mg/L), with P uptake rate coefficients ( K ) increasing significantly under stronger illumination. These results demonstrate, for the first time, the light-mediated synergistic biofilm–LDH interaction in regulating P dynamics, providing new insights for eco-friendly functional materials in sustainable eutrophic lake remediation.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Weiyi Chen,Bin Han,Yili Xie,Shujie Liang,Hong Deng,Zhang Lin
Converting carbon dioxide (CO 2 ) to multiple energy-rich chemicals by photocatalysis could validly mitigate the severe issues of climate changes and energy shortages. Exploring efficient catalysts for enhancing the performance of CO 2 photoreduction is still challenging. Herein, a novel three-dimensional hierarchical Co-Co layered double hydroxide/Ti 3 C 2 T X nanosheets (Co-Co LDH/TNS) nanoarray was successfully prepared via an in-situ MOF-derived strategy. This wise design rationally integrates the functional and structural merits of active Co species with conductive MXene to a hierarchical nanoarray architecture composed of ultrathin nanosheets, which can remarkably promote separation of photogenerated charge carriers and accelerate electrons transmission. Benefitting from these features, the hierarchical Co-Co LDH/TNS composites manifest significant enhancement on the CO 2 -to-CO evolving rate (1.25 × 10 4 µmol h −1 g −1 ) under illumination (>400 nm) with a high apparent quantum efficiency (0.92%) and excellent stability. Our work demonstrates that 3D hybrid structure composed of MXene species can serve as promising candidates for CO 2 photoreduction, providing fundamental guidance to improve photocatalytic performance by rational engineering of complex hierarchical architecture materials.
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
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 29
·期 7
·2147-2160
·
IF 2.137
Ping Zhu,Zhongji Gu,Shu Hong,Hailan Lian
Layered double hydroxides (LDHs) are emerging as a new and green high-efficient flame retardant. But LDHs aggregate seriously because of their hydrophilicity, which affect deeply the mechanical and flame retardant properties of their composites. For the first time in this paper, microencapsulated LDHs (MCLDHs) with melamine-formaldehyde (MF) resin were prepared by microencapsulation technology to enhance their compatibility and dispersion within epoxy resin (EP). The mechanical and flame retardant performances of EP/MCLDH composite were studied by comparing with EP/LDH composite. Results showed that the water contact angle of MCLDHs increased from 8.9° to 122.1°, which indicated good compatibility. The particle size of MCLDHs decreased sharply, and more than one-third were up to submicron scale, which can be conducive to dispersion. Moreover, the tensile strength and elongation at break of EP/MCLDHs with different flame retardant contents were higher than those of EP/LDHs. And the addition of MCLDHs increased the glass transition temperature (Tg) of EP/MCLDHs, which meant a strong interfacial interaction. Besides, compared with EP/LDHs, the limiting oxygen index values of EP/MCLDHs were higher, and its peak of heat release rate and total heat release decreased by 16.3% and 5.5% respectively. EP/MCLDHs achieved from V-1 to V-0 rate with the increasing content of MCLDHs from 20% to 30%, while LDHs/EP never passed tests. In the process of heating, H 2 O, CO 2 , and NH 3 released from MCLDHs formed gaseous phase, and the remaining dense char layers and oxides produced condensed phase, which played an important role in inhibiting combustion.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Luhong Zhang,Ziqiang Gong,Bin Jiang,Yongli Sun,Zhenxing Chen,Xiang Gao,Na Yang
Recently, there is an urgent demand to remove oil and organic solvents with low surface tension from oily wastewater, which promotes the application of interface biomimetic materials in oil/water separation. In our work, a novel Ni Al LDHs coated superhydrophobic and superoleophilic stainless steel mesh (SS-SSM) with efficient oil/water separation performance was successfully prepared. The 3D flower-like structure intercalated by LDHs monocrystalline flakes was anchored on metallic wires in urea solution by a hydrothermal method and decorated with low surface energy molecules. The as-prepared mesh exhibited perfect superhydrophobicity with water contact angle of 156° and sliding angle of 5°, thus achieving self-cleaning property. In addition, the separation efficiency for a series of oil/water mixtures of the coated mesh was studied, which was up to 98% for most sample oils. More importantly, even treated under severer conditions such as ultrasonic , abrasion and chemical etching solution, the as-prepared meshes possessed good reproducibility in terms of contact angles and separation efficiencies. It is expected that the designed mesh could provide a b brand-new method for superhydrophobic surface coating , making it a potential functional material for self-cleaning, anti-corrosion, fluid drag reduction and oil/water separation.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Yuan Deng,Kai Li,Qingqing Guan,Tianding Hu,Liang He
The improvement of the photothermal stability and mechanical properties for cellulose nanofibers (CNFs) is a highly desirable yet challenging research topic due to its wide applications. Featuring the 2D-organized structure and various characteristics, layered double hydroxides (LDHs) shows tremendous potential in improving the photothermal stability and mechanical properties of CNFs matrix. Herein, a series of ZnAl-LDHs nanosheets intercalated with different organic molecules were synthesized and subsequently doped into CNFs matrix for preparing CNFs/LDHs composited films. It was showed that doping UV-adsorber intercalated ZnAl-LDHs into the CNFs matrix can significantly enhance UV-shielding ability of CNFs/LDHs composited films due to the synergistic effect between organic anions and the interaction between organic anions and metal cations in LDHs laminates. And the CNFs/HUL (HUL = HALS/UV-P-LDHs) composited film exhibited outstanding UV-shielding ability (UV-shielding rate > 60%) among the considered films, which is comparable to that of the reported materials. Compared with the pristine CNFs film, compositing with HUL rendered the increasing of tensile strength from 80 to 110 MPa. The superior photothermal stability and mechanical properties of CNFs/HUL composited film highlight its great application potential in the fields of coating and packaging.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）