Journal of Cleaner Production
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2022
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IF 11.072
Hao Ai,Dan Lei,Menglian Wu,Shasha Li,Kaifeng Du
Designing and tuning towards the porous structure of adsorbents is of great importance for promoting the adsorptive performance. Herein, a magnetic-induced copolymerization method is applied to generate an aligned porous structure in the aligned porous poly(SPS- co. -CTS) monolith. Typically, the aligned macropores primarily derives from the equilibrium of the magnetic dipolar force to the thermodynamic Brown force by tuning the applied magnetostatic field intensity to 25 mT. Due to the aligned macroporous structure, the monolith features with low back pressure , low mass transfer resistance and high adsorptive capacity . The hydrophilicity of the monolith surface is further improved by capping chitosan activated by amino onto its porous surface via the Hinsber reaction. Detail analyses are performed by a series of physical characterizations , by which exhibit the aligned macropores centering at 5.18 μm, specific surface reaching 54 m 2 g −1 and large porosity. Finally, batch adsorption experiments confirm that the adorptive behaviors to Cu 2+ ions and Co 2+ ions submit to the Langmuir model and Pseudo-second order adsorption kinetics . Most intriguing, the film mass transfer ([ k L a ] f ) has been stabilized due to the aligned macropores, thus facilitating the porous diffusion ([ k L a ] d ) and improving the chromatographic performance of the monolith. All results demonstrate that the aligned porous poly(SPS- co. -CTS) monolith promises broad applications in the field of wastewater remediation.
研究领域:
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
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Jingjing Zhao,Victor Malgras,Jongbeom Na,Rui Liang,Yong Cai,Yunqing Kang,Abdulmohsen Ali Alshehri,Khalid Ahmed Alzahrani,Yousef Gamaan Alghamdi,Toru Asahi,Dieqing Zhang,Bo Jiang,Hexing Li,Yusuke Yamauchi
Amorphous metal-boron alloys have attracted extensive interest in catalytic reactions because a large number of randomly oriented bonds constitute a glass-like structure with abundant defects and unsaturated surface atoms which are catalytically active. However, the synthesis of non-precious amorphous metal-boron with a multilevel structure remains a challenging task. Here, ultra-long mesoporous cobalt-boron (CoB) amorphous alloy nanochains are firstly synthesized by using the soft-templating approach with the assistance of a magnetic field. Owing to the high surface area and the unique behavior of Co within the Co-B alloy, mesoporous CoB nanochains show superior activity and selectivity in liquid-phase cinnamaldehyde (CMA) hydrogenation in cinnamyl alcohol (CMO). This work opens an avenue for the exploration of mesoporous amorphous metal alloys towards liquid-phase selective hydrogenation reaction.
研究领域:
催化化学
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纳米材料科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2019
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IF 0
Su-Na Yin,Juan Liu,Defeng Wu,Su Chen,Weiwei Xia
As important biological functions of many creatures, structural colors and self-healing features play crucial roles in the survival of organisms. Inspired by these features, the intelligent self-healing colloidal photonic crystals (CPCs) materials with stable structural colors are constructed here by immobilizing magnetically assembling Fe3O4@SiO2 colloidal nanoparticles into a self-repairing hydrogel matrix. The self-repairing hydrogels, prepared by using biodegradable material poly(1-vinyl-2-pyrrolidinone-co-acrylamide) modified with O-carboxymethyl chitosan (O-CMC), exhibit an outstanding mechanical property with favorable toughness and elasticity. Interestingly, one-dimensional Fe3O4@SiO2 chain structures embedded in the framework can maintain the stability of the photonic band-gap structure and its resultant bright structural colors. Furthermore, O-CMC contained in the matrix can supply plentiful carboxyl, amino, and hydroxyl functional groups which can form abundant intermolecular hydrogen bonds, and thus give the robust self-healing capability to the CPC colored hydrogels. On the basis of such CPCs hydrogels with bright structural colors and robust self-healing properties, a 3D flower pattern has been designed to realize arbitrary 3D configurable modeling. This work might constitute a promising simple way to fabricate structural colored CPC materials with a longer functional life, and thus extend their practical applications.
研究领域:
材料科学
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生物仿生学
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产品关联
DOI
APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Yue Zhang,Zewei Wang,Qiong Zhang,Yuqi Song,Bo Zhang,Tianrui Ren,Haifeng Yang,Feng Wang
Antibiotic residues in food have become the focus of attention. In this work, we report a simple self-assembly method to fabricate magnetic Fe 3 O 4 @ [email protected] complex substrate for surface enhanced Raman scattering (SERS) detection of tetracycline hydrochloride (TC), a widely used antibiotics in breeding industry. Assembled Ag nanoparticles (AgNPs) on Fe 3 O 4 NPs helps form more SERS hotspots by magnetic induction, which facilitate the direct aqueous detection and high sensitivity (EF = 4.0 × 10 6 in wet state) of the Fe 3 O 4 @ [email protected] sensor. Polyethyleneimine (PEI) not only acts as interlayer for AgNPs assembly on Fe 3 O 4 particles, but can also direct the interaction between TC and SERS substrate. The binding ratio between B, C, D rings of TC and PEI is calculated to be 1:4 by Ultraviolet–visible spectroscopy (UV–vis) characterization. Simulation study also confirms the multiple TC-PEI interaction mode (hydrogen, σ-π, cation-π). Fe 3 O 4 @ [email protected] sensor also shows very high stability (signal decreases < 5% after 93 days). Fe 3 O 4 @ [email protected] SERS sensing array could have a great potential for real-time sensitive detection of analytes. More importantly, this rational adjustment of interaction sites between substrate and analyte is expected to be a new strategy for the improvement of SERS detection sensitivity and selectivity.
研究领域:
分析化学
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食品科学
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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）