Journal of Water Process Engineering
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2024
·
IF 6.3
Menglan Zhao,Yu Wang,Xiaoyu Liu,Jiyue Ding,Pingke Yan,Qian Zhang,Yujuan Gao,Zilin Meng
Mg Al layered double hydroxides (LDHs) intercalated by Mo 3 S 13 2− and MoS 4 2− (Mo 3 S 13 -LDHs/MoS 4 -LDHs) were prepared through the ion exchange method and compared their removing ability of Cu(II), Pb(II) from wastewater. When the batch experiment conducted at dosage 0.3 g/L, pH neutral, contact time 360 min, concentration 6 mmol/L and temperature 298 K, the adsorption capacity of Cu(II)/Pb(II) onto Mo 3 S 13 -LDHs and MoS 4 -LDHs was 2.76, 4.85 and 2.15, 4.66 mmol/g, Mo 3 S 13 -LDHs showed a higher adsorption capacity, which was because the larger amount of adsorption sites on Mo 3 S 13 2− . In mixed systems, Mo 3 S 13 -LDHs/MoS 4 -LDHs exhibited the preferential selectivity of Pb(II). When Mo 3 S 13 -LDHs/MoS 4 -LDHs adsorbed the low concentrations of Cu(II)/Pb(II), Mo 3 S 13 2− /MoS 4 2− first captured heavy metals and fixed into the interlayer. With the increase of concentration, Cu(II)/Pb(II) were still captured by the interlayered Mo 3 S 13 2− unlike MoS 4 -LDHs that hydroxyl groups onto LDHs began to capture Cu(II)/Pb(II). In the dynamic adsorption experiment, Mo 3 S 13 -LDHs could treat a larger volume of sewage than MoS 4 -LDHs. Mo 3 S 13 -LDHs exhibited better selectivity for Cu(II)/Pb(II) under the interference of organic and other metal ions in wastewater, and heavy metals after the treatment by Mo 3 S 13 -LDHs were more stable in the environment. Therefore, Mo 3 S 13 -LDHs could be considered as an environmentally stable adsorbent to remove heavy metals from wastewater compared to MoS 4 -LDHs.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2024
·
IF 2.2
Fengrong Zhang,Cuilan Zhang,Binghan Zhang,Dandan Han,Longwei Du,Lishun Wu
Blast furnace slag (BFS) is a kind of waste produced in industrial production, as well as a valuable secondary resource. In this paper, layered double hydroxides composites (BFS/LDHs) were prepared by aqueous polymerization, with industrial waste BFS as modifier and magnesium nitrate, aluminium nitrate, and urea as raw materials. BFS/LDHs have been characterized by using scanning electron microscopy (SEM), fourier infrared spectrometer (FT IR), x-ray diffraction (XRD), and the specific surface area analyser (BET). The adsorption of BFS/LDHs on Cu (II) and methylene blue (MB) was investigated by batch experiments. The results showed that the adsorption capacity of BFS/LDHs to Cu (II) is stronger than that of MB. What’s more, the solid concentration effect was found in the process of sorption kinetics and sorption isotherms. The sorption kinetics curves of Cu (II) and MB on BFS/LDHs were well fitted by the quasi-second-order kinetics under different adsorbent concentrations. Langmuir and Freundlich sorption isotherm models were used to analyse the adsorption. It showed that the adsorption conforms to Langmuir and Freundlich’s adsorption isotherm models. The BFS/LDHs composites have good recycling availability in this adsorption process of Cu (II) and MB, the removal capacity of which was reduced by 16.1% and 3.8% after being recycled for six times, respectively. More importantly, BFS/LDHs composites are not only expected to become a sewage treatment agent, but also to solve the problem of industrial waste treatment, which is a win–win strategy.
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
PubMed
高影响因子
Nano Research
·
2024
·
IF 9.5
Israr Muhammad,Humayun Muhammad,Zhang Jiaqi,Shah Khadim,Tan Xin,Chen Chen,Li Yadong
To address the sluggish kinetics of the oxygen evolution reaction (OER), a potential approach is to rationally design and fabricate extremely effective single atom catalysts (SACs). Using an appropriate matrix to stabilize single-atom active centers with optimal geometric and electronic structures is crucial for enhancing catalytic activity. Herein, we report the design and fabrication of Ir single atoms on NiFeZn layered double hydroxide (Ir-SAC/NiFeZn-LDH) electrocatalyst for highly efficient and stable OER. It is investigated that the NiFeZn support exhibits abundant defect sites and unsaturated coordination sites. These sites function to anchor and stabilize single Ir single atoms on the support. The strong synergetic electronic interaction between the Ir single atoms and the NiFeZn matrix resulted in remarkable OER performance of the as-fabricated Ir-SAC/NiFeZn catalyst. With a loading Ir content of 1.09 wt.%, this catalyst demonstrates a highly stable OER activity, with an overpotential of 196 mV at 10 mA·cm −2 and a small Tafel slope of 35 mV·dec −1 for the OER in a 1 M KOH solution. These results significantly surpass the performance of the commercially available IrO 2 catalyst.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
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IF 7.8
Sujie Shan,Xingning Huang,Zhenyu Yang,Jie Ji,Zhihao Chen,Chongming Wang,Xinpeng Xu,Xi Li,Yao Xu,Songqi Liu,Boling Li,Dapeng Li
Scavenging low-concentration phosphate in secondary effluents to ultra-low levels (e.g., <0.05 mg-P/L) is crucial for mitigating severe eutrophication issues. While adsorption shows promise for phosphate removal and recovery, challenges such as limited sorption capacity and selectivity for low-level phosphate persist, increasing operational costs. Herein, lanthanum (La)-incorporated MgFe-layered double hydroxide/biochar (La-MgFe-LDH/BC) composites were synthesized using a simple coprecipitation method for the effective sequestration and recovery of low-level phosphate. The incorporation of La promoted the formation of amorphous LDH species with markedly reduced particle sizes, enhanced porosity, and increased carbonate groups. Consequently, La-MgFe-LDH/BC exhibited an exceptional sorption capacity of 62.51 mg-P/g, rapid sorption kinetics of <60 minutes, and a broad applicable pH range (3-11), with strong anti-interference capabilities against concomitant anions and humic acids. La-MgFe-LDH/BC effectively scavenged phosphate from real secondary effluents and raw sewage, achieving extreme-low phosphate levels below 0.01 mg-P/L, making it highly applicable for effluent polishing. Furthermore, it showed excellent reusability and phosphate recovery potential with over 90% desorption efficiency, with ligand exchange mechanisms being primary pathways for phosphate capture. These findings highlight La-MgFe-LDH/BC as a promising candidate for low-level phosphate removal and advance the application of LDH-based composites.
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 AGRICULTURAL AND FOOD CHEMISTRY
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2019
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IF 3.571
Zhan Zhou,Xiangqian Li,Jinwei Gao,Yiping Tang,Qianming Wang
Considerable interest in using lanthanide complexes in optics have been well-known persisted for a long time. But such molecular-based edifices have been excluded from practical application because of their poor thermal or photo stabilities. Here a novel europium embedded layered double hydroxide (Mg–Al LDH–Eu) has been established and such an inorganic–organic framework demonstrates improved thermal performance due to hydrolysis and poly condensation of the trimethoxysilyl-unit. In addition, the incorporation of a functional building block such as ethylenediamine triacetic acid can significantly minimize the negative effects of hydroxyl groups. In the presence of tetracycline (Tc), the nanoprobe exhibits an “off–on” change in aqueous solution, and the red luminescence can be excited in the visible light range (405 nm). It provides a very sensitive signal response to Tc with an excellent linear relation in the range of 0.1 μM to 5.0 μM, and the detection limit of this probe is measured to be 7.6 nM. This nanoplatform exhibits low cytotoxicity during in vitro experiments and can be employed for the detection of tetracycline in 293T cells.
研究领域:
材料科学
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生物医学
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光学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
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2019
·Vol. 66
·期 12
·1610-1618
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IF 1.188
Tao Wang,Aiyun Hu,Haijun Wang,Yongmei Xia
Layered double hydroxides (LDHs) and their derivatives have been reported to be widely used as heterogeneous catalysts in various reactions. Herein, Ni-Fe LDHs with the controlled Ni/Fe molar ratios (2:1, 3:1, 4:1) were synthesized via an easy hydrothermal method, which were used to catalyze the selective reduction of biomass-derived furfural into furfuryl alcohol using 2-propanol as a H-donor under autogenous pressure and characterized using FT-IR, XRD, TGA, BET, SEM, NH 3 -TPD, and CO 2 -TPD. It was found that the LDH with a Ni/Fe molar ratio of 3:1 demonstrated the best catalytic activity among the LDHs with different Ni/Fe molar ratios, which showed 97.0% conversion of furfural and 90.2% yield of furfuryl alcohol at 140°C for 5 hr. This was attributable to the synergistic effect of acidic sites and basic sites of the catalyst.
研究领域:
化学工程
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催化材料
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 46
·23395-23402
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IF 7.443
Weiyang Lv,Miao Du,Weijuan Ye,Qiang Zheng
The formation mechanism of layered double hydroxide (LDH) nanoscrolls via a trinal-phase hydrothermal system has been investigated via powder X-ray diffraction and transmission electron microscopy (TEM) at different reaction temperatures and times. LDH nanosheets formed at first and subsequently developed into nanoscrolls. Notably, the investigation confirmed that urea and pressure played key roles in the formation of the one-dimensional LDH structure. Further observations by scanning electron microscopy and high-resolution TEM indicated that the nanoscrolls with apparent hollow cores were derived from nanosheets through a roll-up process, rather than through the control of the crystal growth in one particular direction. A detailed model was also proposed to describe the reaction process based on the assumption that the LDH growth units are anion coordination octahedra. Furthermore, owing to the increased specific surface area and novel structure, the nanoscrolls exhibit high adsorption capacity and excellent reusability in the adsorption of methyl orange in aqueous solution.
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
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 24
·期 1
·504
·
IF 6.208
Zhilan Du,Dashuang Wang,Xinfang Zhang,Zhiyu Yi,Jihai Tang,Pingan Yang,Rui Cai,Shuang Yi,Jinsong Rao,Yuxin Zhang
In this work, a novel core-shell structure material, NiFe layered double hydroxide (NiFe LDH) loaded on SiO2microspheres (SiO2@NiFe LDH), was synthesized by a one-step hydrothermal method, and the spontaneous electrostatic self-assembly process. The morphology, structure, and microwave absorption properties of SiO2@NiFe LDH nanocomposites with different NiFe element ratios were systematically investigated. The results show that the sample of SiO2@NiFe LDH-3 nanocomposite has excellent microwave absorption properties. It exhibits broadband effective absorption bandwidth (RL < −10 dB) of 8.24 GHz (from 9.76 GHz to 18.0 GHz) and the reflection loss is −53.78 dB at the matched thickness of 6.95 mm. It is expected that this SiO2@NiFe-LDH core-shell structural material can be used as a promising non-precious, metal-based material microwave absorber to eliminate electromagnetic wave contamination.Keywords:SiO2microspheres;LDH;microwave absorption;core-shell structure
研究领域:
材料科学
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电磁学
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
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2023
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IF 11.4
Peng Lyu,Lianfang Li,Jinli Huang,Jing Ye,Changxiong Zhu,Jinni Xie,Zihan Wang,Mengqi Kang,Ao Yan
The impact of multiple preparation protocols on properties and performance of modified biochar remains unclear. This study prepared layered double hydroxide (LDH)-based magnetic biochars (LMBCs) with different LDH loading rates (LLR), pyrolysis temperatures, and biomass sources to explore their performance-characterization relationships toward As(III) and Cd(II). Higher LLR and pyrolysis temperature enhanced LMBCs᾿ adsorption capacities by increasing specific surface area (SSA) and metal/O-containing groups. Hence, LMBC produced at 2:1 LLR (LDH: magnetic biochar) and 800 ℃ pyrolysis exhibited maximum adsorption over 2 times that of LMBC with 0.5:1 LLR and 400 ℃ pyrolysis. Bamboo-sourced LMBC demonstrated superior adsorption than sewage sludge and garlic-sourced LMBCs due to its increased SSA, enabling a higher loading of nano-LDH. Adsorption of As(III) and Cd(II) onto LMBCs was governed by metal-mineral and metal-containing group through co-precipitation and complexation. This study provides a reference for adjusting the preparation protocols to improve sorption performance of modified biochar toward multiple heavy metals.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 43
·17353-17359
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IF 5.101
Xi-Lin Wu,Lei Wang,Chang-Lun Chen,An-Wu Xu,Xiang-Ke Wang
A composite material, containing magnetite particles, graphene and layered double hydroxides (LDHs) was fabricated through a simple two-step reaction. Graphene was used as the matrix for supporting magnetite particles and LDH nanoplates. The synthesized magnetite-graphene-LDH (MGL) composites were characterized by field emission scanning electron microscopic (FE-SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transformed infrared (FTIR) spectroscopy, N2adsorption-desorption, and X-ray photoelectron spectroscopy (XPS). The MGL composites were applied to remove arsenate from aqueous solutions and could be easily separated by magnetic separation process. The results showed enhanced adsorption capacity of arsenate on the MGL as compared to that of pure Mg/Al LDHs. The surface area of MGL is greatly enhanced through the incorporation of magnetite particles and graphene, which provides more active sites for arsenate uptake. Moreover, LDHs were hybridized with mechanically and chemically stable graphene materials, providing an accessible diffusion pathway in the macropore domain, and therefore their adsorption capacity was enhanced. The fast and efficient adsorption of arsenate from solution to MGL suggests that the MGL composites are potential and suitable materials in the preconcentration of arsenate from large volumes of aqueous solutions in wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
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IF 6.14
Tao Zhou,Shuya Wu,Lianghu Su,Jianying Xiong,Youcai Zhao
Anaerobic fermentation liquid from food waste contains abundant nutrients, such as volatile fatty acids (VFAs) and NH3–N, which are promising nutrient sources for plant growth. Here, we report a novel integrated technique for the simultaneous recovery of C and N sources from anaerobic fermentation liquid. VFAs and NH3–N extracted from anaerobic fermentation liquid were synthesized and converted into layered double hydroxides (LDHs) and NH4HCO3, respectively, for subsequent use as soil amendments to provide external C and N to plants. The X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy/energy dispersive X-ray spectroscopy results suggested that VFAs were successfully intercalated within the LDH, and the composite (VFA-LDH) exhibited good sustained release performance. In the VFA-LDH synthesis process, the concentrations of chemical oxygen demand, VFAs, and NH3–N were reduced by 49.4%, 27.9%, and 43.6% in the anaerobic fermentation liquid, respectively. In addition, VFA-LDH and NH4HCO3 promoted increased soil fertility, including organic matter content, cation exchange capacity, and N and P contents. Overall, the developed technique exhibits great potential as an anaerobic fermentation liquid treatment and nutrient acquisition method.
研究领域:
环境科学
·
农业科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Duanjie Wang,Lei Li,Yingrui Chen,Qian Guo,Dongmei Yu,Dan Yu,Ting Zhao,Shiqiang Wei
Simultaneously extracting phosphate (HPO 4 2- ) and ammonia nitrogen (NH 4 + ) nutrients from the wastewater is of great importance but still poses a challenge as HPO 4 2- and NH 4 + hold opposite charge. In this study, a novel multifunctional composite material (LDH-FA) was prepared through a straightforward flocculation reaction between positively charged layered double hydroxide (LDH) nuclei with negative fulvic acid (FA) macromolecule to synergistic extraction of HPO 4 2- and NH 4 + from liquid digestate. The results show that LDH-FA can capture HPO 4 2- by anion exchange of LDH while simultaneously adsorb NH 4 + through electrostatic attraction of FA. The Zeta potential of LDH-FA is reduced after HPO 4 2- adsorption which further promotes the NH 4 + adsorption, exhibiting a synergistic adsorption performance for HPO 4 2- and NH 4 + . The adsorption capacity of LDH-FA for P can reach 13.7 mg/g, while simultaneously achieving a N adsorption capacity of 279.4 mg/g in liquid digestate. Coexisting ions such as HCO 3 - , SO 4 2- , K + do not impede the adsorption; however, sufficient HPO 4 2- content is crucial for the synergistic adsorption. Through six consecutive adsorption cycles with the supplementary addition of HPO 4 2- after each adsorption, the cumulative removal rates for P and N can reach 99.1 % and 91.3 %, respectively, with average adsorption capacities of 12.1 mg/g and 116.7 mg/g.
研究领域:
环境科学
·
废水处理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）