COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yang Zhang,Hanjun Wu,Zhenyue Zhang,Wenda Guo,Junxia Yu,Rongying Zeng,Ruan Chi,Zhiquan Pan
In this work, Ca-Al LDHs were modified via co-precipitation method utilizing two distinct chemical forms of adipic acid (adipate salt and adipic acid) as intercalation agents, with the resulting materials denoted as At-LDHs (adipate-intercalated LDHs) and Aa-LDHs (adipic acid-intercalated LDHs). The results indicated that At-LDHs and Aa-LDHs all exhibit a sheet-like porous structure stacked with each other. Due to the different synthesis conditions, the sheet structure of Aa-LDHs is smaller than that of At-LDHs. The kinetic and isotherm simulation results indicated that the capture capacity of At-LDHs for Mn 2 + was up to 227.53 mg·g −1 when the pH value was 7, while that of Aa-LDHs for naphthol green B reached to 132.73 mg·g −1 at a pH value of 9. The kinetic and thermodynamic simulation results indicated that the capture of Mn 2+ by At-LDHs conformed to the pseudo-first-order kinetic model and the Langmuir isotherm model, and the capture of naphthol green B by Aa-LDHs conformed to the Elovich kinetic model and the Temkin isotherm model. In addition, the capture process of both was a spontaneous exothermic reaction. Benefiting from the excellent adsorption properties of At-LDHs composites (Ion exchange, electrostatic attraction, adsorption precipitation, functional group chelation), the adsorption effect on Mn 2+ was better. Aa-LDHs have good adsorption effect on naphthol green B in solution through electrostatic attraction, dipole-dipole hydrogen bond, Yoshida hydrogen bond and n-π interaction. At-LDHs and Aa-LDHs have great potential to be employed as the materials for the removal of organic and inorganic composite pollutants from wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Chunlin Chen,Bin Wang,Guoqing Xiao,Fei Zhong,Jian Zhou,Min Cao,Zhengwei Yang,Chunyan Chen,Rui Zou
In this study, phytic acid -doped polyaniline (PPA) was loaded on the surface of carbon spheres, resulting in a classical C-N-P flame retardant system, that has a beneficial function for the formation of residual carbon. Subsequently, using this phosphorus-nitride carbon sphere (CS/PPA) as a carrier, flower-like Ni-Al-layered double hydroxide (Ni-Al/LDH) were uniformly grown on its surface, thus obtaining a novel nano-fire retardant with a graded structure to heighten the fire-resistant properties of aqueous epoxy resin . Importantly, the intervention of Ni-Al/LDH nanosheets not only imparts a gas-phase fire retardant function to the coating, but also the presence of Ni and Al bimetals can effectively catalyze the formation of more residual carbon in the combustion process. The highest residual carbon (30.7 %) in thermal weight loss experiments of the CS/PPA@Ni-Al/LDH/EP composite coating confirmed this view. Tests on the thermal insulation behavior of coatings illustrated that the backside temperature (168.8 °C) for CS/PPA@Ni-Al/LDH/EP was significantly smaller than that of other coatings, and that this optimum thermal shielding is inextricably linked to the high residual carbon and the residual metal oxides . Furthermore, the CS/PPA@Ni-Al/LDH/EP specimen shown the greatest expansion height (25.1 mm), expansion ratio (19.61) as well as the smallest smoke density rating (39.1 %), proving that its expansion property and smoke suppression were effectively improved. Moreover, the microstructure for the expanded carbon layer demonstrated that the CS/PPA@Ni-Al/LDH filled EP possessed a more complete and dense residual carbon after burning. Moreover, the high degree of graphitization of the residual carbon for CS/PPA@Ni-Al/LDH/EP determined its high thermal stability. The lowest cracked gas phase products and CO release of the CS/PPA@Ni-Al/LDH/EP composite coating during TG-IR testing confirmed its lowest fire toxicity. The development of such a composite flame retardant with a graded structure could help to advance the progress of waterborne intumescent fire coatings.
研究领域:
材料科学
·
火灾安全工程
✓ 已验证
DOI
高影响因子
Green Energy & Environment
·
2024
·
IF 10.7
Junming Zeng,Yongbin Yao,Fang Wang,Jiajian Gao,Lili Zhang,Guangwen Xu,Ziyi Zhong,Fabing Su
Nickle-based catalysts are commonly used for CO 2 methanation. However, there is still potential to improve their catalytic performance under mild conditions. In this study, we synthesized a series of Ru-Ni-Al catalysts from Ru-doped NiAl-hydrotalcite using a hydrothermal method. The Ru-Ni-Al catalyst demonstrated much higher activity for CO 2 methanation than the Ni-Al catalyst that did not have Ru doping. Both experimental results and theoretical calculations indicate that the enhanced performance of the Ru-Ni-Al catalyst is related to electronic interactions between nickel (Ni) and ruthenium (Ru). The Ru sites transfer electrons to the Ni sites, increasing the local electron density of Ni, which enhances the adsorption and activation of H 2 . Furthermore, the Ru-Ni metal interface sites improve the adsorption and activation of CO 2 . In situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) analysis indicates that adjusting the electronic structure of Ni sites can accelerate the production of intermediates HCOO*, while Ru-Ni intermetallic interface sites can directly dissociate CO 2 into CO*. In addition, CO 2 methanation on the Ru-Ni-Al catalyst follows HCOO*- and CO*-mediated pathways. This study underscores the potential for enhancing CO 2 methanation performance by modulating the electronic structure of Ni sites.
研究领域:
催化化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Xijun Li,Runze Xue,Yuan Liu,Cuijuan Zhang
Development of highly active and stable catalysts is critical for the hydrogenation of CO2 to methanol. Herein, a Cu-based catalyst was demonstrated by impregnating 20%ZnO onto the Cu–Al spinel followed by reduction. The catalyst delivers a methanol yield of 0.218 g g−1 h−1 with a CO2 conversion of 9.2% at 220 °C, 3 MPa, 6000 mL g−1 h−1, and is stable over a 300 h test. Various characterization techniques reveal that ZnO inhibits the growth of Cu nanoparticles during exsolution. Furthermore, there is strong electronic interaction between the components, i.e., the electron migrates from ZnO to the Cu–Al spinel, which leads to more oxygen vacancies and an electron-rich support and thus beneficial for CO2 hydrogenation to methanol.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Yujie Li,Yixing Wang,Zhenying Liu,Luyao Jiang,Hu Yang,Zhenliang Xu
Molecular separation of dye mixtures containing the same charge remains a challenge. In the present study, we prepared a composite membrane that could efficiently separate anionic dye mixtures. Briefly, Al-Metal-organic framework (Al-MOF) nanoparticles synthesized by the ion-exchange method were used as fillers during the in-situ synthesis of ethanolamine (ETA) grafted polyacrylonitrile (PAN) membrane. The optimized composite membrane showed a high rejection of congo red (CR) from a single solution (96% rejection) and the CR/methyl orange (MO) mixture (93%/18%) solution. The flux of dye mixture solution reached 180 L m −2 h −1 , higher than many reports in the literature. The further modification on pore size (heat treatment) or surface charge (hydrolysis treatment) improved the membrane performance to separate smaller dye mixture of methyl blue (MB)/MO. Both modified membranes showed a good MB rejection (93%) and flux of 70–85 L m −2 h −1 . While for the separation of the MB/MO mixture, the heat-treated membrane showed the lowest flux and a middling rejection. The surface hydrolyzed membrane showed a better selectivity (96% MB/32% MO) and a higher flux (127 L m −2 h −1 ) than that of the entirety hydrolyzed membrane (93% MB/58% MO and flux of 78 L m −2 h −1 ), which was attributed to their different charge distribution.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Shaorong An,Qiang Jin
The development of highly dispersed metal-based materials loaded on carbon is of great importance for environmental remediation. However, their catalytic activities face huge challenges. In this study, a series of super activated carbon-supported Fe-Al layered double hydroxides (FeAl-LDH@SAC x ) were prepared, and the peroxymonosulfate (PMS) oxidation performance and activation mechanism were probed with Rhodamine B (RhB) as a representative pollutant. Results showed that FeAl-LDH@SAC 0.02 composites exhibited superior ability in activating PMS compared to other catalysts, as evidenced by the rate constants for RhB degradation, which followed the order: FeAl-LDH@SAC 0.02 (0.5507 min −1 )>FeAl-LDH@SAC 0.04 (0.4738 min −1 )>FeAl-LDH (0.4121 min −1 )>FeAl-LDH@SAC 0.01 (0.3512 min −1 )>FeAl-LDH@SAC 0.08 (0.2701 min −1 ). The optimal doping amount for SAC depended on the ratio of active FeAl-LDH and its dispersion on the SAC, which helped to promote interfacial electron transfer. Impressively, the sulfate radicals (SO 4 · − ), hydroxyl radical (·OH), and singlet oxygen ( 1 O 2 ) made major contributions to RhB removal. The results of the toxicity assessment showed that the overall toxicity of the system tended to decrease as the catalytic oxidation proceeded. Finally, the effective removal of aromatic proteins and soluble microbial metabolites in actual dye wastewater within 60 min demonstrated that the catalytic oxidation system involving FeAl-LDH@SAC 0.02 was promising for water treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 55
·43906-43916
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IF 3.84
Zakir Hussain,Li Daosheng,Li Xi,Kang Jianxiong
A study has been designed for a fluoride adsorbent synthesized by a co-precipitation approach of Mg(II), Al(III) and La(III) salts (MAL) in 2 : 1 : 2 ratios. The prepared material illustrated relatively stable fluoride adsorption potential and an amorphous structure at temperatures lower than 600 °C. The defluoridation capacity of a 2 g L−1 adsorbent dose at room temperature was observed to be between 24.08 to 98.28% for a 10 and 20.66 mg L−1 fluoride solution in a broad pH range (2 to 12), while for a 45.45 mg L−1 solution, it varied between 26.49 to 80.42%. The adsorption process on MAL was endothermic in nature (−ΔG), follows pseudo second order kinetics (R2 = 0.999) and best fitted with a Langmuir sorption isotherm model (R2 = 0.9985). The prepared material was characterized by XRD, SEM, BET, EDX, FTIR and XPS, whereas contact times, sorption kinetics, dosage and the effect of major co-existing anions were carried out for the optimization of the adsorbent. In addition to amphoteric behavior of Al(III) in the composite material, the effect of fluoride concentration and sorbent quantity in a batch process appeared to be important factors in maintaining the near neutral pH of the treated water. Similarly, one other factor, flow rate was found to affect the pH in the column adsorption process. Regeneration of up to 95.71% of the fluoride loaded adsorbent was achieved with a methanol and HCl mixture. The results showed that Al(III) acted as amphoteric reagent and keeps the pH within drinking water range or near neutral.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Su Han,Li Jingru,Zhong Yu,Liu Yu,Gao Xuhong,Kuang Juner,Wang Minkang,Lin Chunxi,Wang Xiuli,Tu Jiangping
Sulfides are promising electrolyte materials for all-solid-state Li metal batteries due to their high ionic conductivity and machinability. However, compatibility issues at the negative electrode/sulfide electrolyte interface hinder their practical implementation. Despite previous studies have proposed considerable strategies to improve the negative electrode/sulfide electrolyte interfacial stability, industrial-scale engineering solutions remain elusive. Here, we introduce a scalable Li-Al-Cl stratified structure, formed through the strain-activated separating behavior of thermodynamically unfavorable Li/Li 9 Al 4 and Li/LiCl interfaces, to stabilize the negative electrode/sulfide electrolyte interface. In the Li-Al-Cl stratified structure, Li 9 Al 4 and LiCl are enriched at the surface to serve as a robust solid electrolyte interphase and are diluted in bulk by Li metal to construct a skeleton. Enabled by its unique structural characteristic, the Li-Al-Cl stratified structure significantly enhances the stability of negative electrode/sulfide electrolyte interface. This work reports a strain-activated phase separation phenomenon and proposes a practical pathway for negative electrode/sulfide electrolyte interface engineering.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Kun Tong,Rong Li,Jingting Zhu,Heliang Yao,Huaijuan Zhou,Xianzhe Zeng,Shidong Ji,Ping Jin
VO 2 /Al-O core-shell structure (V/AO) was synthesized by a facile method and its application for thermochromic film on smart window was investigated. Comparisons of thermochromic properties and stabilities in different environments between VO 2 and annealed V/AO nanoparticles were made. As a result, VO 2 nanoparticle was easily oxidized and lost thermochromic property. In contrast, with the protection provided by Al-O-based shell, the VO 2 core remained stable at a high temperature (350 °C in air) and in H 2 O 2 solution. Especially, thermochromic films made by annealed V/AO nanoparticles almost kept thermochromic performance in damp heating environment (T=60 °C, RH=90%) for 20 days while VO 2 films lost their thermochromic properties after 3 days. Besides, the degradation progress of VO 2 and V/AO nanoparticles in damp heating environment was also explored. Results indicate that Al-O-based shell provides a good protection for the VO 2 core originated from the compact structure of shell, which effectively prevents oxygen and water from eroding VO 2 . In summary, the VO 2 nanoparticles coated with Al-O-based shell exhibit a great potential in the application of smart window.
研究领域:
材料科学
·
纳米技术
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2025
·
IF 2.5
Yuge Liu,Zhiguo Li,Yongmei Jia
The fast detection of environmental contaminants catechol (CC) and hydroquinone (HQ) is of great importance to public health. In this research, a composite was firstly synthesised by a pre-exfoliation method, the components of which were Ni-Al-LDH and reduced graphene (rGO). This material was then utilised in the development of a highly sensitive biosensor for determining CC and HQ. The construction procedure involved modification of glassy carbon electrode (GCE) by the composite and laccase (LAC). Tests conducted by electrochemical methods showed the addition of laccase can greatly improve the response signal of electrochemical measurements on the composite modified GCE to CC and HQ. The electrochemical tests were performed by utilising 0.1 mol/L phosphate-buffer. When separately detected, the detecting linear range for CC by the biosensor was 0.009–0.58 and 0.95–4.4 mmol/L. When it comes to HQ, the range was 0.009–0.57 and 0.95–4.4 mmol/L on the composite/enzyme modified electrode. When the biosensor was used for detecting CC and HQ together, the linear ranges were both 0.019–0.56 and 1.0–4.4 mmol/L. The detection limits calculated for simultaneous detection were 0.75 and 0.47 μmol/L, respectively. The sensor also possessed excellent sensitivity, selectivity and long stability. For applicability of the biosensor, it was used in analysing the two substrates in real water samples, and the recoveries were acceptable.
研究领域:
环境科学
·
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2024
·
IF 3.5
Yanru Zhu,Zhen Zhang,Yunfei Zou,Jian Zhang,Zhe An,Xin Shu,Hongyan Song,Jing He
Catalytic conversion of biomass-derived 5-(hydroxymethyl)furfural (5-HMF) into carbon-increased hydrocarbons as drop-in energy-rich biofuels has received a great deal of concern for the development of sustainable chemical industry. Here, we demonstrate a one-pot conversion of 5-HMF into C 9 -alkanes on one single catalyst, acidic–basic layered double oxides (Mg(Al)(Zr)O) supported CuCo alloy. The well-defined multifunctional catalytic sites with harmonious combination carry out cascade catalysis, affording C 9 -alkanes (including 30% of more value-added branched-cycloalkanes) in 83% yield. The basic–acidic sites on Mg(Al)(Zr)O show high activity for aldol condensation of 5-HMF and acetone, producing 4-[5-(hydroxymethyl)-2-furanyl]-3-buten-2-one (HAc) in a yield of >99%. The engineered Co–Cu–Co linkages on supported CuCo perform efficient hydrodeoxygenation, affording C 9 -alkanes in a selectivity of 96% from HAc. C 9 -cycloalkanes are generated from the cyclization of the corresponding monohydric alcohol intermediates by the synergy of acidic and CuCo sites in the hydrodeoxygenation reaction.
研究领域:
化学工程
·
催化
·
可再生能源
·
生物质转化
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2022
·Vol. 12
·期 1
·1-10
·
IF 4.996
Tan Meina,Qin Yang,Wang Yiping,Zhang Fazhi,Lei Xiaodong
We propose a new Cu–Al dual-ion battery that aqueous solution composed of LiCl, CuCl and AlCl 3 (LiCuAl) is used as the electrolyte, CuS is used as the cathode of aqueous aluminum ion battery for the first time and copper foil is used as the anode. The assembled Cu–Al dual-ion battery yields a reversible capacity of 538 mA h/g at 200 mA/g, and exhibits longterm cycling stability of over 200 cycles with 88.6% capacity retention at 1000 mA/g. Above excellent performance is inseparable from the three components of LiCuAl electrolyte and electrode materials. The Al-storage mechanism of CuS is proposed that the S–S bond in CuS lattice interacts with aluminum ions during the aluminum storage process. In addition, the charging and discharging process does not cause irreversible damage to the S–S bond, thus Cu–Al dual-ion battery with CuS as cathode shows great cycle stability.
研究领域:
电化学
·
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）