CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Kiran Gupta,Jiang-Bo Huo,Jia-Cheng E. Yang,Ming-Lai Fu,Baoling Yuan,Zhangxu Chen
We introduced (MoS 4 ) 2− moiety into the lamellar layers of Ca 0.66 Al 0.34 (OH) 2 (NO 3 ) 0.34 ⋅yH 2 O to fabricate Ca 0.66 Al 0.34 (OH) 2 (MoS 4 ) 0.17 ⋅yH 2 O (CA-MoS 4 ⋅LDH), a stable and efficient adsorbent for removal of two envoy Fluoroquinolones (FQs), Ciprofloxacin (CIP) and Ofloxacin (OFL), from contaminated aquatic sources. Various characterization tools, such as X-ray diffraction (XRD), Scanning electron microscopy, Energy dispersive X-ray spectrometer, transmission electron microscopy , X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy and Thermogravimetric analyses etc. were applied to confirm structural and compositional changes during the synthesis and adsorption properties of CA-MoS 4 ⋅LDH. The efficiency of adsorbent was investigated by evaluating different parameters including contact time, pH of solution, initial concentration of pollutant, and effect of temperature. By using CA-MoS 4 ⋅LDH as adsorbent, we found more efficient removal of CIP than that of OFL due to the steric hindrance. The highest uptake of 707.20 mg/g and 476.74 mg/g of CIP and OFL, respectively, was found at pH of 6 with improved kinetics and easily reusability for these representative antibiotics models so far. Removal kinetics of both FQs were found to better follow the pseudo-second-order kinetic model than the pseudo-first-order. The Langmuir adsorption isotherm was employed to understand the removal process, suggesting monolayer chemisorption mechanism. The adsorbate-adsorbent interaction revealed remarkable features originate from the combination of weak hydrogen bond interaction between thio group and NH 2 + group of antibiotic and electrostatic interaction between positive LDH layer and COO − group of antibiotic as well, and anion exchange mechanisms, which were also confirmed by XRD, FTIR, XPS and Raman spectrum etc. obtained after adsorption. It is proposed that all (MoS 4 ) 2− moiety offers stability to the CA-MoS 4 ⋅LDH structure to avoid its solubility under ambient environments.
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
International Journal of Electrochemical Science
·
2024
·
IF 1.3
Peng Zhang,Xin Meng,Xiaomin Luo,Jian Wang,Jianyan Feng,Yun Ma,Ka Li,Ying Liu,Lufeng Ji
Herein, we innovatively crafted a novel CNT/MoS 2 /FeCo-LDH cathode membrane using a facile vacuum filtration method. Benefiting from the unique heterostructure between FeCo-LDH and MoS 2 , the prepared CNT/MoS 2 /FeCo-LDH cathode membranes catalyzed the production of high-concentration H 2 O 2 (7.59 mg/L) at a low current density of 1.50 mA/cm 2 . The peak degradation efficiency of phenol (98.80 %) was reached in only 60 min. Under optimized operating conditions, the phenol removal rate of the CNT/MoS 2 /FeCo-LDH cathode membrane remained above 80.00 % within a wide pH range (3.0–9.0), demonstrating excellent adaptability. The synergistic incorporation of Mo, Fe, and Co ions facilitated additional chemical reaction pathways for Fenton-like reactions, thereby significantly enhancing hydrogen peroxide production. Notably, our approach exhibited moderate total organic carbon degradation efficiency, even for the actual pretreatment of coking wastewater, presenting a promising strategy for addressing recalcitrant industrial wastewater.
研究领域:
环境科学
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材料科学
·
废水处理技术
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DOI
高影响因子
ACS Applied Energy Materials
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2022
·
IF 6.959
Yanxue Guan,Juan Qin,Xinyue Guo,Zongjia Li,Haoran Guo,Miaomiao Zhang,Bailin Zhang,Jilin Tang
Nickel-aluminum layered double hydroxides (Ni-Al LDHs) are widely used in energy storage and conversion devices, and the impact of the Ni/Al molar ratio on the structural evolution and kinetic process is of great significance for improving reaction kinetics and efficiency. In this paper, the morphological evolutions and nanomechanical property changes of Ni-Al-n LDH (n is the Ni/Al molar ratio) nanosheets during potential cycling were explored by in situ electrochemical atomic force microscopy. The conversion of Ni2+ into Ni3+ and the amphoteric properties of Al3+ during potential cycling resulted in the dissolution of Ni-Al-n LDH nanosheets. The dissolution rate of Ni-Al-2 LDH nanosheets was slower than those of Ni-Al-2.5 LDH and Ni-Al-3 LDH nanosheets. Meanwhile, the Young’s modulus value of the dissolved area was much larger than that of the undissolved area, and the dissolved area exhibited a harder property. It was attributed to the different microcrystalline structures of Ni-Al LDH nanosheets affected by the Ni/Al molar ratio and the rearrangement of Ni2+ and Al3+ during the reaction. The slow dissolution of Ni-Al-2 LDH nanosheets was beneficial to improving the electrochemical performance, while the fast dissolution of Ni-Al-2.5 LDH and Ni-Al-3 LDH nanosheets was not conducive to the electrochemical performance. Understanding the effect of the Ni/Al molar ratio on the morphological evolutions and nanomechanical property changes of Ni-Al LDH nanosheets during potential cycling has important guiding significance for the subtle compositional modification and structural design of Ni-Al LDHs as an electrode material.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Abdelazeem S. Eltaweil,Ahmed E. Awad,Eman M. Abd El-Monaem,Azza M. Shaker,Gehan M. El-Subruiti
The growing issue of Pb 2+ ions contamination in marine environments necessitates the development of effective adsorbents to significantly mitigate this ecological challenge. In response, a novel composite material comprising layered double hydroxide (LDH), boron nitride (BN), and tin ferrite (SnFe 2 O 4 ) was synthesized for the removal of Pb 2+ ions. The synthesized SnFe 2 O 4 /BN/NiAl-LDH composite was characterized using FTIR, XRD, ZP, SEM, and XPS techniques. Pb 2+ ions removal reached equilibrium within 30 minutes, with a removal efficiency of 95.42%. Pb 2+ removal efficiency increased progressively in the following order based on the data: SnFe 2 O 4 /BN/NiAl-LDH (1:1) > SnFe 2 O 4 /BN/NiAl-LDH (3:1) > SnFe 2 O 4 /BN/NiAl-LDH (1:3). Furthermore, the experimental data were consistent with the Langmuir and Freundlich isotherms, as well as the pseudo-second-order kinetic model, with a maximum adsorption capacity of 434.8 mg/g. Notably, the composite retained over 70% removal efficiency after five cycles, demonstrating its efficient recyclability. In summary, SnFe 2 O 4 /BN/NiAl-LDH exhibits rapid and efficient adsorption, easy separation, and excellent recyclability.
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
Surfaces and Interfaces
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2024
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IF 5.7
Zhuangzhuang Xiong,Ziheng Qi,Wenhui Zhang,Mingbo Ji,Fuqiu Ma,Lixia Ying,Guixiang Wang
Anodized aluminum, due to its inherent porous channels and thin protective layer, exhibits poor corrosion resistance and friction performance in severe environments. In this study, an in-situ growth of a NiZnAl-LDH composite coating was developed on the surface of aluminum. Sodium molybdate and ricinoleic acid were used to modify the coating, enhancing both corrosion resistance and friction performance. Various tests, including SEM, infrared, XPS, XRD, and others, were conducted to analyze the structure, composition, and properties of the synthesized coating. The results confirmed the successful synthesis of NiZnAl-LDH with nitrate intercalation, which were subsequently converted to molybdate intercalation through sodium molybdate modification. Electrochemical tests revealed that the corrosion current decreased by a factor of two compared to a plain LDH coating. Friction experiments demonstrated that the co-modified coating exhibited a minimal friction coefficient of 0.23, outperforming the original LDH coating.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Zihan Wei,Xiaoqian Ren,Tianhong Mei,Rongcheng Xiang,Wugan Wei,Xiaorui Yang,Yan Fang,Wenlong Xu,Jianliang Zhu,Jinhua Liang
In this study, various of MgFeTi-LDH/g-C3N4 photocatalytic materials had been successfully synthesized through self-assembly, and the physicochemical and photoelectric properties were thoroughly characterized. Optical performance characterizations of band gaps and VB-XPS spectra revealed that the EVB and ECB alignment of MgFeTi (3:1)-LDH/g-C3N4 composites are consistent with the fundamental characteristics of S-type heterojunctions. MgFeTi (3:1)-LDH/g-C3N4 coupled with sodium persulfate activation for TCH degradation achieved nearly 100% removal efficiency under visible light, surpassing previously reported catalysts. Moreover, five repeated tests of MgFeTi (3:1)-LDH/g-C₃N₄ showed negligible change in the removal rate of TCH, indicating its potential value for industrial applications. Furthermore, the catalytic degradation pathway and mechanism for MgFeTi (3:1)-LDH/g-C3N4 have been elucidated through LC-MS analysis, radical capture, and characterization. In addition, the high efficiency of TCH degradation is attributed to the synergy of Fe3+、Fe2+, SPS, and active species such as •OH, SO4•−, and •O2−. Finally, the QSAR analysis and OD600 values suggest that the degradation pathway and time lead to a reduction in toxicity and the potential risk to the degradation liquid. This study offers simple, economical approach to completely degradation TCH, also providing practical application prospects in wastewater treatment.
研究领域:
环境科学
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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
TALANTA
·
2024
·
IF 5.6
Feifan Qi,Mengdie Wu,Simin Liu,Wendi Mu,Chunyan Wu,Xinshui Ren,Chuang Rui,Fangfang Wu,Dong Chang,Hongzhi Pan
Carbohydrate antigen 199 (CA199) is the most sensitive marker reported for pancreatic cancer, and it is a difficult task to develop a highly sensitive assay for CA199. During the experiment, a ratiometric electrochemical immunosensor for quantitative analysis of CA199 was prepared for NiCo@Fc-MWCNTs-LDH as the electrode sensing surface and 3D-rGOF@Ag/Au as the label of Ab 2 . NiCo@Fc-MWCNTs-LDH not only provide the required signal for the immunosensor, but also have a layered structure to obtain a large specific surface area, which can provide more sites for the placement of biological molecules. rGOF has the advantages of large specific surface area and high porosity, which can adsorb Ag electrochemical probe through redox reaction. The modification of gold nanoparticles can not only enhance the electrical conductivity of nano-composites, but also immobilize more biomolecules to improve the sensitivity of electrochemical sensors. With the beefing up of CA199 concentration, the oxidation peak current of Ag increases and the oxidation peak current of Fc-COOH decreases. The ratio (y = I Ag /I Fc-COOH ) of two different signals was linear with the logarithm of CA199 concentration in a certain value range. Under optimal conditions, the immunosensor showed excellent performance in the concentration range of 0.0001 U/mL to 10 U/mL, and the detection limit was 5.55 × 10 −4 U/mL. The strategy could clearly discriminate between matched and mismatched targets, demonstrating high specifificity. This approach further detects CA199 in human plasma to differentiate pancreatic cancer patients from healthy individuals with high accuracy. This method also provided a new idea for the ultrasensitive quantitative detection of other biomarkers.
研究领域:
生物医学工程
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肿瘤标志物检测
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纳米材料科学
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Zhengfeng Shen,Peng jingjing,Jianxin Liu,Yawen Wang,Yunfang Wang,Zhongde Wang,Caimei Fan,Rui Li,Jiancheng Wang
The highly selective photocatalytic oxidation of methane (CH 4 ) to oxygenates remains challenging due to over-oxidation and low efficiency. Herein, a series of chromate-intercalated ZnTi-layered double hydroxide (CrO 4 2- -ZnTi-LDH, CZT-x) photocatalysts were constructed via a combined hydrothermal and anion-exchange method. Under simulated solar irradiation, the optimized CZT-30 catalyst achieves a remarkable oxygenates production rate of 2603.60 μmol·g -1 ·h -1 , which is 1.67 times higher than that of the pristine ZnTi-LDH, with nearly 100% selectivity. This high selectivity (>92%) is well maintained over a 9-hour duration. Structural and spectroscopic analyses reveal that the intercalated CrO 4 2- anions not only modulate the interlayer microenvironment and host electronic structure but also enhance light absorption and charge separation efficiency. In-situ EPR and Raman spectroscopy revealed that the CrO 4 2- intercalation serves a dual function: it selectively boosts the generation of the key *OOH intermediate and enhances the hole-mediated activation of *CH 4 to *CH 3 . This synergistic effect promotes the coupling of *CH 3 and *OOH, leading to the highly selective production of oxygenates. This work provides a strategy for designing efficient LDH photocatalysts for selective methane valorization.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Siyuan Jin,Zhou Jie,Ruizhi Wu,Xiaochun Ma,Zhe Yu,Wang Guixiang,Jinghuai Zhang,Boris Krit,Sergey Betsofen,Neshchimenko Vitalii,Buzikov Ruslan,Min Qiu,Yurong Yang,Jiaming Chen
An in-situ grown LDH/ZIF-8 hybrid film on the surface of MAO film based on the LA93 alloy was successfully fabricated by the one-step method. The composite film, called as MLZ, demonstrates exceptional corrosion resistance. The corrosion current density is reduced by two orders of magnitude compared to the MAO film. Furthermore, it possesses significant long-term protective capabilities. Experimental measurement and density functional theory (DFT) calculations were conducted to investigate the formation mechanism of MLZ composite film. During the hydrothermal, Zn ions from the in-situ generated LDH on the MAO surface serves as active nucleation sites, facilitating the nucleation and growth of ZIF-8 crystals. The formation of ZIF-8 effectively compensates for the intergranular defects in LDH, enhancing the integrity of the film. LDH/ZIF-8 film effectively seals defects in the MAO film and constructs a robust physical barrier, significantly enhancing the protective capacity of the film.
研究领域:
材料科学
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腐蚀与防护
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产品关联
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 5
·3033-3044
·
IF 2.4
Lan Yongzhi,Yu Rui,Wang Qing,Dai Jianfeng
A trimetallic layered double hydroxide (LDH), NiCoMg-LDH, was rationally designed and synthesized in this paper by hydrolytic etching of Ni 2+ and Mg 2+ using Co-MOF as a conversion template, during which the rhombic dodecahedral structure of Co-MOF was etched to form a hollow cage structure overlaid with nanosheets on the surface. In comparison to the NiCo-LDH prepared by monometallic ion etching, the NiCoMg-LDH prepared in this study has a larger specific surface area and a more stable hollow porous structure, which can provide a large number of active sites for redox reactions as well as ion transport channels. The trimetallic Ni 1 Co 1 Mg-LDH has a higher specific capacity of 2141.62 F g −1 (208.21 mAh g −1 ) at 1 A g −1 current density compared to the NiCo-LDH. It also keeps 83.61% of its specific capacity after 5000 cycles at 10 A g −1 . It also performs well in rate capacity, with a capacity retention rate of 74.49% at 20 A g −1 . With Ni 1 Co 1 Mg-LDH serving as the positive electrode and AC serving as the negative electrode, the hybrid supercapacitor (HSC) exhibits a high energy density of 61.65 Wh kg −1 at a power density of 800.02 W kg −1 . After 10,000 cycles of charge and discharge, 80.17% of the capacity was retained. This study demonstrates that the trimetallic LDH structure generated using bimetallic ion etching with MOF as a template can increase the performance and stability of supercapacitors.
研究领域:
材料科学
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能源存储与转换
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产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 23
·12870-12878
·
IF 2.936
Li Tan,Hailong Li,Mengru Liu
In this study, CMC–LDH beads were prepared and characterized using SEM, FTIR and TG analysis. The beads were applied for the removal of Cr(VI) from aqueous solution. The effects of adsorbent dosage, initial pH and initial concentration of Cr(VI) solution on Cr(VI) uptake were investigated in detail. Moreover, adsorption isotherms and adsorption kinetic models were employed to analyze the adsorption process, and a preliminary study of the reusability of the adsorbent was performed. The experimental results showed that the CMC–LDH beads could remove Cr(VI) from aqueous solution efficiently. When the initial concentration of the Cr(VI) solution was 100 mg L−1 and the adsorbent dosage was 12 g L−1, the removal efficiency of Cr(VI) reached 96.2%. After the CMC–LDH beads were reused 10 times, the removal efficiency of Cr(VI) still remained at 89.6%.
研究领域:
环境科学
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材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Hua Tian,Wentao Bao,Yang Jiang,Lin Wang,Lin Zhang,Ou Sha,Cunqi Wu,Faming Gao
The ingenious synthesis strategies have been highly desired to construct hybrid composites with intriguing properties for supercapacitors . Herein, Ni-Al LDH (layered double hydroxide)/NNDG (nitramine-N-doped graphene) hybrid composites with a layered structure were fabricated via a novel self-assembly process. Nitramine-N dopants anchored to graphene framework allow the self-immobilization of delaminated Ni-Al LDH nanolayers onto the surface of two-dimensional carbonaceous scaffolds and boost the abundance of Ni 3+ within hybrid composites along with the removal of interlayer anions within Ni-Al LDH-NO 3 . Remarkably, the combination of Ni-Al LDH with NNDG can not only enhance the utilization of electrochemically active matrixes in dependence on the increase of electrolyte accessible active sites, but also maximize the electrochemically active contact between inorganic macromolecules and carbonaceous matrixes in favor of the establishment of conductive architectures. Furthermore, Ni-Al LDH/NNDG hybrid composites achieve a specific capacity of 975 C g −1 at a specific current of 1.0 A g −1 with a capacity retention of 75% as the increase of specific currents to 10 A g −1 , superior to Ni-Al LDH-NO 3 and Ni-Al LDH/rGO hybrid composites. The hybrid supercapacitor comprised of Ni-Al LDH/NNDG hybrid composites as a positive electrode and activated carbon as a negative electrode attains a high energy density of 59 Wh kg −1 with a power density of 1991 W kg −1 at a specific current of 2.5 A g −1 and retains 95% of the initial capacitance after 10 000 cycles at a specific current of 10 A g −1 . The excellence electrochemical performance demonstrates clearly the potential application of self-assembled Ni-Al LDH/NNDG hybrid composites for hybrid supercapacitors.
研究领域:
材料科学
·
能源存储与转换
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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）