COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yingfeng Wang,Kaizhun Li,Wenjing Xue,Huang Hu,Ming Huang,Maoli Yin
Environmental contamination can cause serious problems in water cycling systems. In this study, mesoporous composite-supported N-halamines (MCSNs) were synthesized and characterized, where the surface area retention rate of the MCSNs was over 70 % higher than MCM-41. The reaction between organic N-halamines and formaldehyde was examined in aqueous phase. The monomeric N-halamines (MCDMH) rapidly reacted with formaldehyde (10 ppm, 10 mL), and finished completely within 10 min. The MCSNs only reacted with formaldehyde in the high molar ratio (Cl + to formaldehyde, 40:1) and alkaline conditions (pH higher than 10), and approximately 60 % of formaldehyde can be degraded within 10 min. The reaction kinetics were studied and the kinetic parameters were investigated. The MCSNs were highly effective against S. aureus (7.94 logs) and E. coli O157:H7 (8.0 logs) with 1 min of contact time, demonstrating impressive antibacterial properties in aqueous conditions. As a type of antibacterial material, MCSNs introduce a new direction for the application of N-halamine-based materials in formaldehyde decontamination , indicating their potential to be utilized as novel water treatment materials.
研究领域:
环境科学
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材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Mengru Wu,Xinshu Li,Yaoyang He,Kaisu Li,Songlin Yang,Mingchang Zhu,Na Sun
The detrimental effects on human health and ecological security caused by antibiotic pollution of the aquatic environment have attracted widespread attention. The development of more effective materials is urgently needed for antibiotic removal. In this paper, a mesoporous composite of SiO 2 /UIO-66–400 was prepared via a solvothermal reaction. The synthesized SiO 2 /UIO-66–400 has a good recycling performance (four times). Adsorption kinetics can be observed that the adsorption equilibrium can be reached within 120 min. At a pH of 7.00, a temperature of 5°C and an adsorbent dose of 0.25 mg·mL −1 , the adsorption capacity of the SiO 2 /UIO-66–400 for 200 mg·L -1 ofloxacin (OFL) can be up to 77.60 mg·g −1 . The interactions at the adsorbent-adsorbate interface are multifaceted, encompassing scenarios of monolayer and multilayer adsorption. Several attractive forces such as pore filling, electrostatic interaction, hydrogen bonding, and π-π attraction are identified as the primary drivers of antibiotic from water.
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
ENVIRONMENTAL POLLUTION
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2016
·
IF 4.839
Na Li,Fenglian Fu,Jianwei Lu,Zecong Ding,Bing Tang,Jiabin Pang
Chromium-contaminated water is regarded as one of the biggest threats to human health. In this study, a novel magnetic mesoporous MnFe 2 O 4 @SiO 2 −CTAB composite was prepared by a facile one-step modification method and applied to remove Cr(VI). X-ray diffraction, scanning electron microscopy, transmission electron microscopy , specific surface area, and vibrating sample magnetometer were used to characterize MnFe 2 O 4 @SiO 2 −CTAB composites. The morphology analysis showed that the composites displayed a core-shell structure. The outer shell was mesoporous silica with CTAB and the core was MnFe 2 O 4 nanoparticles , which ensured the easy separation by an external magnetic field. The performance of MnFe 2 O 4 @SiO 2 −CTAB composites in Cr(VI) removal was far better than that of bare MnFe 2 O 4 nanoparticles. There were two reasons for the effective removal of Cr(VI) by MnFe 2 O 4 @SiO 2 −CTAB composites: (1) mesoporous silica shell with abundant CTA + significantly enhanced the Cr(VI) adsorption capacity of the composites; (2) a portion of Cr(VI) was reduced to less toxic Cr(III) by MnFe 2 O 4 , followed by Cr(III) immobilized on MnFe 2 O 4 @SiO 2 −CTAB composites, which had been demonstrated by X-ray photoelectron spectroscopy results. The adsorption of Cr(VI) onto MnFe 2 O 4 @SiO 2 −CTAB followed the Freundlich isotherm model and pseudo-second-order model. Tests on the regeneration and reuse of the composites were performed. The removal efficiency of Cr(VI) still retained 92.4% in the sixth cycle. MnFe 2 O 4 @SiO 2 −CTAB composites exhibited a great potential for the removal of Cr(VI) from water.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shaojuan Zeng,Junli Wang,Pengfei Li,Haifeng Dong,Hui Wang,Xiaochun Zhang,Xiangping Zhang
The emerging of ionic liquids (ILs) provides a promising way to efficiently separate ammonia (NH 3 ) and simultaneously recover NH 3 due to their negligible volatility, good affinity with NH 3 and designable structures. However, the relatively high viscosities of ILs and the limited gas-liquid interface severely affect gas diffusion in ILs, which hinders their practical use in industries. In this work, in order to overcome the mass-transfer limitations of ILs in gas separation, three metal ILs (MILs), [Bmim] 2 [CuCl 4 ], [Bmim] 2 [NiCl 4 ] and [Bmim] 2 [Co(NCS) 4 ], with good affinity toward NH 3 were incorporated into porous silica gels with large surface area and abundant hydroxyl groups, by an impregnation-vaporization method to form novel MIL@silica gel composites for rapid, efficient and reversible adsorption of NH 3 . The FT-IR and BET results indicated that the prepared adsorbents with different loadings of MILs are mesoporous composites. The [Bmim] 2 [Co(NCS) 4 ]@silica gel composites not only show much higher NH 3 capacity and NH 3 selectivity than pristine silica gel and faster adsorption rate than the corresponding pure MILs, but also exhibit excellent reversibility. The highest capacity of NH 3 adsorption up to 99.808 mg NH 3 ·(g adsorbent) −1 in 15 min was obtained when the loading of [Bmim] 2 [Co(NCS) 4 ] in the MIL@silica gel composite was 48.89 wt%, which could be attributed to the synergistic interaction of the complexation and hydrogen bonding between cobalt coordinated anion and NH 3 as well as mesoporous structures. Moreover, the NH 3 absorbed by the [Bmim] 2 [Co(SCN) 4 ]@silica gel can be completely released in 15 min, and no obvious losses in NH 3 capacity were detected during five adsorption and regeneration cycles, indicating great potentials as adsorbents for NH 3 separation applications.
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
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2017
·Vol. 1
·期 6
·1185-1193
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IF 0
Wei Huang,Xinxin Xiao,Christian Engelbrekt,Minwei Zhang,Shuo Li,Jens Ulstrup,Lijie Ci,Jinkui Feng,Pengchao Si,Qijin Chi
The discovery of new anode materials and engineering their fine structures are the core elements in the development of new-generation lithium ion batteries (LIBs). To this end, we herein report a novel nanostructured composite consisting of approximately 75% Fe3O4 nanorods and 25% reduced graphene oxide (rGO). Microscopy and spectroscopy analyses have identified that the Fe3O4 nanorods are wrapped (or encapsulated) by the rGO nanosheets via covalent bonding, which further self-assemble into a mesoporous hybrid composite networked by the graphene matrix. The composite has an average pore size around 20 nm and exhibits a high surface area of 152 m2 g−1, which is 76 times as high as that of conventional Fe3O4 powder. We have used the composite as an LIB anode material to fabricate coin-type prototype cells with lithium as the cathode. Systematic half-cell testing evaluations show that the electrochemical performance of the present composite material is amongst the best of the transition metal-oxide based LIB anode materials. The performances are characterized by a high reversible capacity of 1053 mA h g−1 subjected to 250 charge–discharge cycles at 500 mA g−1 and an excellent rate capability with the deliverable energy of 788–541 mA h g−1 upon the application of high current densities of 1000–5000 mA g−1. Overall, we have demonstrated that Fe3O4 nanorod–rGO hybrid composite is an interesting and promising material for the fabrication of LIB anodes.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
SCIENCE OF THE TOTAL ENVIRONMENT
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2019
·
IF 5.589
Dandan Zhu,Jing Zuo,Yinshan Jiang,Jinyi Zhang,Jiupeng Zhang,Cundi Wei
Coal gasification fine slag (CGFS) was produced in the coal gasification process which was classified as an industrial solid waste. It was featured with naturally formed amorphous structures and an abundance of silicon, carbon and metal oxides . In this study, on the basis of the composition and structure characteristics of CGFS, a simple hydrochloric acid (HCl) leaching technology was applied to in situ prepare carbon-silica mesoporous composites (CSMCs) from CGFS by fully considering the value of the residual carbon. Special focus was put on the novel mechanism of pore formation in amorphous silica glass microspheres (SGM) during acid leaching. Experimental evidences showed that the metal oxides were uniformly distributed in SGM thus the dissolution of the metal oxides were starting from the surface of SGM, then gradually extending to the interior, and finally leading to form “tree branch” mesoporous channels. In addition, a response surface method was used to predict the optimal reaction conditions and the optimal sample (named as CGFS-O) was successfully prepared. CGFS-O possessed a prominent specific surface area (SSA) (337.51 m 2 /g) as well as an excellent pore volume (0.341 cm 3 /g). CGFS-O also exhibited a desirable capacity for NO 3 − removing and the adsorption process was studied detailed by changing different adsorption conditions. Adsorption results proved that CSMCs have the potential to purify wastewater in an economically and environmentally way. Therefore, combined with a proof-of-concept adsorption performance experiment, our study has not only provided a cost-effective strategy to industrially prepare CSMCs, reutilizing CGFS in an environmentally friendly way, but also contributed to the future applications of CSMCs with valuable insights into the pore formation mechanism in SGM during acid leaching process.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS
·
2025
·
IF 2.4
Mengyu Lin,Jiumei Chu,Dianjun Dong,Xue Yang,Dianquan Dong
Spinel-type titanium-based lithium-ion sieve H 4 Ti 5 O 12 has excellent theoretical adsorption capacity and selectivity. Still, spinel-type lithium adsorbents prepared in existing studies have poor adsorption, poor recyclability, and difficulty in recovery. To solve the above problems, composite mesoporous ion sieves, Polyvinyl Butyral-H 4 Ti 5 O 12 –1 (PVB-HTO-1) modified with dual surfactants, were synthesized for the first time in this paper. Hydrophilic lithium-ion sieve HTO-1 with a mesoporous structure was synthesized by adding two surfactants, CTAB and F127. Then the modified ion sieve was composited with PVB to make a fine rod-like composite material, PVB-HTO-1, with a diameter of no more than 0.5 mm, to solve the limitation of the industrial application that the recycling of powdered ion sieve is difficult. The bi-component surfactant-derived ion sieve, PVB-HTO-1, exhibits superior hydrophilicity and possesses a porous mesoporous framework that facilitates ion exchange processes, achieving adsorption equilibrium within a timeframe of three hours. It demonstrates a remarkable maximum adsorption capacity of 53.25 mg/g. Even after undergoing five cycles of adsorption and desorption, the material's adsorption capacity remains at over 90 % of its initial value, indicative of its robust cyclic stability. The uptake of Li + ions by PVB-HTO-1 aligns with the pseudo-second-order kinetic model and conforms to the Langmuir isothermal adsorption model.
研究领域:
材料科学
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化学工程
·
环境科学
·
纳米技术
·
分离技术
✓ 已验证
产品关联
DOI
高影响因子
BIOMASS & BIOENERGY
·
2023
·
IF 6
Jirui Yang,Yanwei Zhang,Feng Shen,Xinhua Qi
Meerwein-Ponndorf-Verley (MPV) reaction has been widely acknowledged to be a mild catalytic transfer hydrogenation method for selective reduction of biomass-derived furfural to furfuryl alcohol . Herein zirconium-containing mesoporous composite catalyst was developed through the combination of sol-gel process and soft templating method, in which naturally abundant glucose and F127 triblock copolymer were used as the ligand and pore-forming agent, respectively. The hydroxyl groups in glucose molecules were demonstrated to be coordinated with zirconium ion during hydrolysis-condensation of zirconium precursor, leading to the even dispersion of zirconia nanoparticles in the composite catalyst. The composite catalyst was proven to be highly efficient for catalyzing MPV reduction of furfural with the maximum furfuryl alcohol yield of 93.4% at 180 °C within 180 min in 2-propanol, which served as both solvent and reductant . The composite also showed a good reusability . After five consecutive reaction cycles, furfuryl alcohol yield was slightly reduced from 93.4% to 77.7%, but it could be recovered to 92.8% after the reused composite was regenerated with dilute alkali solution. Batch experiments and systematic characterizations demonstrated that the excellent catalytic performance of composite catalyst was determined by multiple factors mainly including the stronger Lewis acidity, a considerable amount of basic site and the rich mesoporous structure. This study provides a facile strategy to prepare multifunctional composite catalysts using naturally abundant carbohydrates as the feedstocks for lignocellulosic biorefinery .
研究领域:
催化
·
材料科学
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化学工程
·
生物炼制
✓ 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）