ENVIRONMENTAL RESEARCH
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2025
·
IF 7.7
Ning Liu,Ti-Bo Fang,Ling-Xi Zhao,Na Li,Xiang-Feng Chen,Ru-Song Zhao
Naphthalene acetic acid (NAA) is an auxin plant growth regulator (PGR) and widely used to regulate the growth process of plants. As excessive NAA enter the environment, it damages the ecological environment and endangers human life and health. Layered bimetallic hydroxides (LDHs) are widely used for the adsorption of pollutants due to their large surface area and excellent structural properties. Based on the classical Fe 3 O 4 @MgAl-LDH material, Fe 3 O 4 @FeMgAl-LDHs were synthesized by adding different contents of Fe element to adsorb NAA in water. The morphology and properties of Fe 3 O 4 @FeMgAl-LDHs and the effect of Fe on adsorption efficiency were studied. The adsorption process and adsorption mechanism of NAA were analyzed. The results indicated that the content of Fe element will affect the adsorption effect of NAA by influencing the specific surface area and adsorption sites of Fe 3 O 4 @FeMgAl-LDHs. The maximum adsorption capacity for NAA can reach 330.1 mg/g when the proportion of Fe is 0.50. Exploring the adsorption mechanism, Fe 3 O 4 @FeMgAl-LDHs achieved efficient removal of NAA through hydrogen bonding, van der Waals forces, anion exchange, and electrostatic interactions. The adsorption efficiency of various PGRs were deeply explored. Fe 3 O 4 @FeMgAl-LDH (Fe-0.50) has good adsorption and regeneration ability for various PGRs. Therefore, by exploring the influence of different Fe ratios on the adsorption efficiency of the Fe 3 O 4 @FeMgAl-LDH, the adsorption performance of the material can be improved, making it have greater application advantages in wastewater treatment containing drugs.
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
CHEMICAL PHYSICS LETTERS
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2025
·
IF 3.1
Xinyao Wang,Shaofen Zhao,Wei Shi,Jiangli Sun,Zheming Ni,Shengjie Xia
In this study, WO 3 @NiCr-LDHs Z-scheme heterojunctions have been synthesised for the photodegradation of NOR. A comprehensive investigation was conducted into the effects of the Ni/Cr ratio, catalyst dosage, norfloxacin concentration, temperature and pH of the aqueous environment on the degradation activity of the composites. Furthermore, the stability and reusability of the catalyst after the reaction were discussed. The structural composition and morphological features of the materials were characterised by XRD, SEM and TEM, and the photoelectric properties of the heterojunctions were investigated by photoluminescence spectroscopy and UV–vis diffuse reflectance spectroscopy. The experimental findings demonstrated that a quantity of 15 mg of WO 3 @NiCr-LDHs in conjunction with 50 ml of a 10 mg/L norfloxacin solution in an aqueous environment at a temperature of 20°C and a pH of 7, resulted in 86.01 % of the material being degraded after 120 min of light irradiation. This value was found to be 2.75 and 1.23 times higher than that of WO 3 and LDHs, respectively. Kinetic and thermodynamic analyses indicated that the catalyst amount and temperature were the predominant factors influencing the photodegradation process. The efficient photodegradation is attributable to the built-in electric field produced by the Z-scheme heterojunction, which promotes the separation of photogenerated electron holes, allowing more electrons to be converted into free radicals to work with the holes in the degradation of NOR.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Xinqi Han,Zihan Lin,Xingquan He,Lili Cui,Dongxiao Lu
Here, Fe, Co-layered double hydroxide and polyaniline composites onto nickel foam (NF) (FeCo-LDH/PANI) were fabricated via one-step co-electrodeposition method. The test results indicate the co-existence of the amorphous structure and the smaller size of crystal district with more defects in optimal FeCo-LDH/PANI. Importantly, it is found that there are more defects in FeCo-LDH/PANI compared to that of FeCo-LDH possibly attributed to the local etching of H + released from the polymerization of aniline. Benefitting from the numerous defects, higher electrochemical surface area (ECSA), lower charge-transfer resistance and electron interaction, the optimized FeCo-LDH/PANI needs the overpotentials of 104, 246, 285 and 323 mV vs RHE for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) to achieve 10 and 100 mA cm −2 , and shows desirable stability. Noticeably, the optimal FeCo-LDH/PANI requires a cell voltage of 1.53 V to drive 10 mA cm −2 for the whole water splitting.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2023
·
IF 4
Yue Meng,Yun Jia,Zhiling Huang,Chundong Liu,Bo Xie,Shengjie Xia,Takeaki Sakurai
A series of novel organic-inorganic hybrid layered materials NiO/ZnNiCr-SalenNi-LDHs containing three different nickel components were prepared by facile coprecipitation . The above LDHs-based materials were characterized by XRD , SEM, TEM, FT-IR, UV–Vis DRS , XPS and XRF , and these results indicate that the different Ni components are located in the layers, intercalated between the layers and sported on the surface of the LDHs materials. The effects of different Ni components on the photocatalytic properties of the materials were investigated, and the regenerative ability of the hybrid material with the highest photocatalytic activity was explored. The introduce of Ni 2+ , SalenNi and NiO can affect the photocatalytic properties of the hybrid materials, in which SalenNi has the greatest effect on the photocatalytic performance of the hybrid materials. The material prepared under molar ratio conditions of Zn(NO 3 ) 2 ·6H 2 O: Ni(NO 3 ) 2 ·6H 2 O: Cr(NO 3 ) 3 ·9H 2 O = 3 : 1: 1, SalenNi: Cr(NO 3 ) 3 ·9H 2 O = 1 : 1, NiO: Cr(NO 3 ) 3 ·9H 2 O = 0.75 : 1 shows the strongest photocatalytic performance, and the degradation rate of Rhodamin B (RhB) can reach 93.8%. Meanwhile, this hybrid material has strong stability and high recycling efficiency. In addition, the photoactive species quenching experiments indicate that •O 2 − and h VB + are the main active species in the photocatalytic degradation of RhB.
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
Catalysts
·
2023
·Vol. 13
·期 6
·1012
·
IF 3.9
Jia Wang,Yongfu Lian
The poor conductivity and instability of layered dihydroxides (LDHs) limit their widespread application in oxygen evolution reaction (OER). In this study, the composite electrode of NiMn-LDHs, reduced graphene oxide (rGO) and nickel foam (NF), i.e., NiMn-LDHs/rGO/NF, was prepared by a hydrothermal method. When subjected to oxygen evolution reaction (OER) catalytic performance in a solution of 1 M KOH, the NiMn-LDHs/rGO/NF composite catalyst exhibited an overpotential of only 140 mV at a current density of 10 mA cm−2and a Tafel slope of 49 mV dec−1, which is not only better than the comparing RuO2/NF catalyst, but also better than most of the Mn-based and the Ni–Fe-containing bimetallic OER catalysts reported in the literature. The excellent electrocatalytic performance is ascribed to the efficient integration of ultrathin NiMn-LDH sheets, thin-layered rGO and NF, contributing significantly to the decrease in charge transfer resistance and the increase in electrochemically active surface area. Moreover, NF plays a role of current collector and a role of rigid support for the NiMn-LDHs/rGO composite, contributing extra conductivity and stability to the NiMn-LDHs/rGO/NF composite electrode.
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
JOURNAL OF MATERIALS SCIENCE
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2014
·Vol. 49
·期 20
·6944-6951
·
IF 2.305
Wang Yongjuan,Zhou Yuming,Zhang Tao,He Man,Bu Xiaohai
The biomolecule–inorganic hybrid materials are potential candidates for low infrared emissivity materials due to the combined functionalities of the biomolecules and the inorganic components. In this study, we describe a facile approach to fabricate DNA/layered double hydroxides (LDHs) nanohybrid by coassembly of exfoliated Ni–In LDHs nanosheets with DNA. In the assembly progress, exfoliated LDHs nanosheets and DNA with different initial DNA/LDHs mass ratio were mixed together, and the DNA intercalated LDHs nanohybrid was obtained only when the input DNA/LDHs mass ratio is ≤0.3 mg/mg. The structure and morphology of as-fabricated hybrid materials were characterized by X-ray diffraction (XRD), UV–Vis absorption spectra, Fourier transform infrared (FT-IR) spectra, thermogravimetry (TG), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results indicate that the reassembled product has layered structures incorporated with DNA biomolecule. The nanohybrid with expanding LDHs structure of d
003 = 2.6 nm confirms the intercalation of DNA molecules into the LDHs interlayer. The helix chain oriented parallel to the basal plane of host layer forming ordered sandwich structure. The infrared emissivity value of the DNA/LDHs nanohybrid was then investigated. It was found that the infrared emissivity values were significantly reduced by coassembly of exfoliated LDHs nanosheets with DNA, which may be attributed to the synergistic effect and interfacial interaction between the DNA biomolecule and inorganic LDHs layers reinforced by the construction of ordered sandwich structure.
研究领域:
材料科学
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生物化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Xun Li,Yue Meng,Jinhua Li,Lianyang Zhang,Bo Xie,Zheming Ni,Shengjie Xia
Photocatalytic activation of persulfate for the synergistic degradation of pollutants has become a major research hotspot, but the activation effect is poor due to the problems of low catalyst carrier separation efficiency and insufficient active sites. In this study, direct Z-Scheme heterojunctions of MoO 2 @CoFe LDHs were prepared by a simple hydrothermal method and a Co and Fe dual active site system was constructed to activate Na 2 S 2 O 8 (PS) for the synergistic degradation of tetracycline under visible light. The results showed that the synergistic degradation of tetracycline was 3.7 times and 2.7 times more efficient than the original heterojunction and PS, respectively. Combining material characterisation, photovoltaic performance tests and theoretical calculations revealed that the high efficiency is attributed to the formation of an internal electric field under the Z-Scheme heterostructure type generating effective electron-hole separation, with more photo-generated electrons converted into radicals acting together with holes to degrade the TC and activate the PS. More importantly, Co(II) and Fe(II) provide electrons to synergistically activate PS, and a portion of the photogenerated electrons and PS activation intermediates can facilitate cycling between Co(II)/Co(III) and Fe(II)/Fe(III) to accelerate PS activation. This paper's work on activating PS-assisted Z-Scheme heterojunctions for the efficient degradation of TC provides a reference for the study of high-performance photocatalytic catalysts for the degradation of organic pollutants .
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Yi Wang,Huanhuan Guo,Xiaohan Xing,Can Wang,Xuefeng Zhang,Xiumin Li,Fengfeng Gao,Xiaogang Hao
A lithium aluminum iron layered double hydroxides/multiwalled carbon nanotubes/quaternized chitosan (LiAlFe-LDHs/MWCNTs/QCS) composite membrane with lithium-ion vacancies (Li + -trap) was fabricated through vacuum filtration method and pre-desorption process. The Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane had been developed for the selective extraction of Li + within the ship lock-type ion selective permeability (SL-ISP) system. In the Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane, the Li + -trap within LiAlFe-LDHs was pivotal for achieving selective Li + extraction. This selectivity was realized through the cyclic intercalation of Li + into the Li + -trap sites within the interlayer structure of LiAlFe-LDHs, a process that also facilitates the permeation of Cl - . The interference of impurity ions was further eliminated by the SL-ISP system, thus facilitating the selective extraction of Li + . Upon investigation, the Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane was found to achieve a Li + flux of 0.055 mol·m −2 ·h −1 and a separation factor of 8.3 at an equimolar concentration ( C Mg, Li = 0.05 M) within the SL-ISP system. Additionally, the Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane demonstrated excellent separation performance in simulated brine, with a calculated Li + permeation flux of 0.053 mol·m −2 ·h −1 . The separation factors of Li + /Mg 2+ , Li + /K + , Li + /Na + and Li + /Ca 2+ reached values of 91.84, 69.75, 81.51 and 17.99, respectively. Therefore, the Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane could be effectively applied in the SL-ISP system for the selective extraction of Li + .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Carbon Letters
·
2025
·
IF 5.8
Du Xue,Han Tong,Jin Biao,Meng Long-Yue,Han Lian-Hua
Contamination of food with heavy metal ions and nitrites poses a serious threat to human health. Consequently, the development of fast and sensitive platforms for detecting these contaminants is urgently required. In this paper, a novel MnMgFe-LDHs/DC sensor is constructed based on a simple strategy, in which MnMgFe layered double hydroxide (LDHs) is used as a metal precursor, and a unique "island bridge" carbon network structure is generated by its pyrolysis with ZIF-8@B, N-WMCNTs. The electrical conductivity was enhanced, and a large electroactive surface area was provided for the MnMgFe-LDHs/DC. The electrochemical properties of Pb 2+ , Cd 2+ and nitrite were investigated using this electrode as a working electrode. Under optimized conditions, the sensing platform exhibited a wide linear range with the Pb 2+ , Cd 2+ , and NO 2 − limits of detection of 46.16 nM, 59.25 nM, and 0.083 μM, respectively. Of particular note is that this sensing platform exhibits outstanding anti-interference capabilities. It can precisely and efficiently conduct the detection of nitrite and heavy metal ions in pickled foods.
研究领域:
食品科学
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环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
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
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Yongli Sun,Jingshuai Li,Luhong Zhang,Bin Jiang,Xiaodong Yang,Na Yang,Feifei Peng,Mi Xu,Xiaoming Xiao
In view of the serious water pollution issue, a kind of environmentally friendly, dual-functional, energy-efficient and low-cost superwetting material is urgently prepared for oil/water separation and the degradation of dyes in wastewater. In our work, dual-functional Zn-Ni-Co LDH@NiMoO 4 nanoarrays (ZNC-NM) with porous core-shell structure were constructed on the stainless steel mesh (SSM) via a facile two-step hydrothermal method. The coated mesh exhibited favorable superhydyophilicity and underwater superoleophobicity with underwater oil contact angle (OCA) of 164.9°. Meanwhile, the as-prepared mesh possessed ultrahigh separation efficiency and high permeation flux for a series of oil/water mixtures. In addition, the good anti-fouling and self-cleaning property enabled the separation efficiency remain above 99.90% after 60 separation recycles. By virtue of good stability and anti-corrosive property, there were no remarkable alterations in the separation efficiency and underwater OCA of the designed mesh in harsh environments. More importantly, the NiMoO 4 nanosheets anchored on Zn-Ni-Co LDH with the visible light responsiveness demonstrated favorable photocatalytic performance, which could efficiently degrade organic dyes in wastewater. Therefore, the dual-functional mesh coated with ZNC-NM nanoarrays based on this facile strategy is a promising material for oil/water separation and photocatalysis, owning great application potential in wastewater remediation.
研究领域:
环境科学
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材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Haiping Li,Yuying Zhang,Bo Huang,Feifei Yang,Qiang Ma,Xiaolin Wang,Yuying Liu,Junwu Ren,Xiaojuan Pan,Ce Liang,Shimin Wang,Hao Ning,Changhong Qin,Yan Jiang,Ai Ran,Bin Xiao
Gastric cancer (GC) is a prevalent malignancy in China, necessitating innovative treatments. Recent advancements in nucleic acid drugs, particularly small interfering RNAs (siRNAs), have shown promise in therapeutic applications. Biodegradable layered double hydroxides (LDHs), as a class of typical two-dimensional (2D) materials, hold great prospects in biomedical and drug delivery systems. Building on our previous research, which identified the upregulated insulin-like growth factor 2 mRNA-binding protein 3 (IGF2BP3) promoted GC progression, we devised a strategy that leverages the unique properties of LDHs carriers with siRNA therapeutics. Herein, we synthesized CuAl-LDHs containing variable valence metal cations (Cu 2+ ), capable of inducing a Fenton-like reaction in the tumor micro-acid environment (TME) of GC. Subsequently, we constructed si-IGF2BP3/CuAl-LDHs nanocomposites to protect and deliver si-IGF2BP3 via the CuAl-LDHs carrier. The obtained nanocomposites demonstrated significant efficacy in inhibiting GC cell proliferation by silencing the IGF2BP3 gene at both the mRNA and protein levels, accelerating oxidative stress in GC cells through a Fenton-like reaction, and achieving greater suppression of tumor volume than CuAl-LDHs alone. The remarkable anti-tumor effect was attributed to the CuAl-LDHs carrier’s superior siRNA immobilization and delivery capabilities, as well as the catalytic ability of Cu in CuAl-LDHs, facilitating the Fenton-like reaction within TME. Overall, this integrated GC therapy strategy employing LDHs nano-carriers may represent a significant advancement in developing next-generation therapeutic systems. It underscores the potential of LDHs as an effective platform for targeted GC therapy.
研究领域:
肿瘤学
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纳米技术
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药物递送系统
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分子生物学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）