JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Jun Liao,CongCong Ding,Liang Jiang,Junping Shi,Qiuyi Wang,Zihao Wang,Lielin Wang
In this work, Fe 3+ -doped and -NH 2 -grafted montmorillonite-based material was prepared and the adsorption ability for uranium(VI) was verified. The microstructure and pore size distribution of the montmorillonite-based material were investigated by N 2 adsorption-desorption analyzer and scanning electron microscopy. The surface groups and composition were analyzed by Fourier transform infrared spectrometer, X-ray photoelectron spectrometer and X-ray diffractometer, which proved the successful doping of Fe 3+ and grafting of -NH 2 . In the adsorption study, the adsorption reached equilibrium within 100 min with a maximum adsorption capacity of 661.2 mg/g at pH = 6 and a high adsorption efficiency of 99.4 % at low uranium(VI) concentration (pH = 6, m/V = 0.5 g/L). The mechanism study showed that the strong synergistic complexation of -OH and -NH 2 for uranium(VI) played a decisive role in the adsorption process and the transport function of interlayer bound water could also enhance the adsorption probability of uranium(VI) species. These results were far superior to other reported similar materials, which proved that the Fe 3+ -doped and -NH 2 -grafted montmorillonite-based material possessed an extremely high application potential in adsorption, providing a new route for the modification of montmorillonite.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Cell Systems
·
2024
·
IF 9
Runtao Zhu,Jiao Zhang,Lin Wang,Yunfeng Zhang,Yang Zhao,Ying Han,Jing Sun,Xi Zhang,Ying Dou,Huaxiong Yao,Wei Yan,Xiaozhou Luo,Junbiao Dai,Zhuojun Dai
Functionalizing materials with biomacromolecules such as enzymes has broad applications in biotechnology and biomedicine. Here, we introduce a grafting method mediated by living cells to functionalize materials. We use polymeric scaffolds to trap engineered bacteria and micron-sized particles with chemical groups serving as active sites for grafting. The bacteria synthesize the desired protein for grafting and autonomously lyse to release it. The released functional moieties are locally grafted onto the active sites, generating the materials engineered by living grafting (MELGs). MELGs are resilient to perturbations because of both the bonding and the regeneration of functional domains synthesized by living cells. The programmability of the bacteria enables us to fabricate MELGs that can respond to external input, decompose a pollutant, reconstitute synthetic pathways for natural product synthesis, and purify mismatched DNA. Our work establishes a bacteria-assisted grafting strategy to functionalize materials with a broad range of biological activities in an integrated, flexible, and modular manner. A record of this paper’s transparent peer review process is included in the supplemental information .
研究领域:
生物技术
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生物医学工程
·
合成生物学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Penggang Pei,Yingming Xu,Lin Wang,Xuefeng Liang,Yuebing Sun
The preparation of low-cost and highly efficient functional materials for the cleanup of mercury-contaminated water by adsorption in an environmentally friendly way is of great significance. In this study, thiol-functionalized montmorillonite (BSH–MMT) was prepared by a novel one-step mechanochemical grafting method and applied to aqueous Hg 2+ and CH 3 Hg + adsorption. Characterization results showed that thiol groups were successfully grafted by chemical bonding with Si–OH or broken Si O bonds. The maximum adsorption capacities of BSH–MMT for Hg 2+ and CH 3 Hg + were 104.79 mg g −1 and 39.27 mg g −1 , which were approximately seven- and nine-fold that of pristine MMT, respectively. Adsorption kinetics and isotherm fitting indicated that Hg 2+ adsorbs heterogeneously, while CH 3 Hg + proceeds through monolayer adsorption, both with chemical adsorption as the rate-limiting step. BSH-MMT maintained high adsorption performance over a wide pH range and in the presence of humic acid because of the high affinity of thiol groups toward mercury. The primary adsorption mechanism of thiol-ligand complexation was confirmed by the results of X-ray photoelectron spectroscopy and X-ray absorption spectra, in which a complex structure of bis-coordinated S–Hg–S (2.30 Å distance) was observed. These results demonstrated that mechanochemical grafting is a promising one-step method to prepare thiol-functionalized montmorillonite for effective cleanup of Hg 2+ /CH 3 Hg + contamination in water.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2016
·Vol. 23
·期 1
·113-120
·
IF 1.87
Chen Hongyin,Ding Jing,Wang Weilong,Wei Xiaolan,Lu Jianfeng
Post modification methods were used to synthesis MCM-41 with different pore sizes, modified by Al grafting and cation doping. Water adsorption characteristics were measured by dynamic water vapor adsorption and analyzed regarding equilibrium and kinetics. Results showed that Al grafting and cations doping modifications on MCM-41 changed water adsorption characteristics. Doped cations strengthened the water adsorption capacity at low RH following the order of Al–C12–Mg > Al–C12–Li > Al–C12–Na. Kinetics analysis indicated that capillary condensation process developed slowly due to low diffusion constant. But the adsorption transient uptake rates in capillary condensation sections were larger compared to other sections, Larger RH step not only resulted in larger uptake rate, but also promoted capillary condensation. Instead of calculating or measuring isotherms and diffusion coefficients respectively, parameters like transient uptake rate corresponding to the effects of both transport ability and adsorption capacity should be considered.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 43
·25911-25917
·
IF 3.119
Xing Jiang,Yong Kong,Zhiyang Zhao,Xiaodong Shen
The objective of this research was to develop a novel spherical amine grafted silica aerogel for CO2 capture. A spherical silica gel was synthesized by dropping a sodium silicate based silica sol into an oil bath. Amine grafting was achieved by bonding 3-aminopropyltriethoxysilane onto the framework of the silica gel. The spherical amine grafted silica gels were dried using vacuum drying to prepare the spherical amine grafted silica aerogels (SASAs). The synthetic mechanism of the SASAs was proposed. The structures and the CO2 adsorption performances of SASAs were researched. The amine loading of the SASAs increased with the grafting time, however, the specific surface area and pore volume sharply decreased owing to the blockage of the pore space. Excess amine loading led to the decrease of the CO2 adsorption capacity. The optimal CO2 adsorption capacity was 1.56 mmol g−1 with dry 1% CO2 and at 35 °C. This work provides a low-cost and environmentally friendly way to design a capable and regenerable adsorbent material.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Xian Wu,Wei Liu,Chun Zhang,Li Ren
An ultra-flexible, thermally conductive and electrically insulating composite paper based on BNNSs was fabricated by vacuum filtration. The paper was prepared via a facile two-step coating/grafting modification process. The surface of BNNSs was firstly wrapped by polyrhodanine and subsequently rubber chains were mechanochemically grafted onto the polyrhodanine coating. In addition, by controlling the content of grafted rubber chains, a flexible and electrically insulating composite paper with an in-plane thermal conductivity of up to 45.7 Wm −1 K −1 has been achieved. This paper may have potential applications as high performance thermal-management materials in electronics.
研究领域:
材料科学
·
热管理技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jingwen Pan,Dongbo Wang,Bingke Zhang,Chenchen Zhao,Donghao Liu,Sihang Liu,Zhi Zeng,Tianyuan Chen,Gang Liu,Shujie Jiao,Zhikun Xu,Tongling Liu,Taifeng Liu,Xuan Fang,Liancheng Zhao,Jinzhong Wang
The synergistic implementation of atomic-level charge separation strategies for bulk–surfaces is a meaningful study that fundamentally addresses the shortcomings of single materials. Here, we report for the first time the atomic-level engineering of atomic doping in combination with surface ion grafting, which can be coordinated to significantly facilitate photocatalytic H 2 evolution. More impressively, the study systematically investigated the atomic doping effects of Fe, Co, Ni and Cu atoms, and analyzed the conditions for optimal doping with experimental and theoretical calculations. The doping of variable valence Cu atoms leads to the emergence of newly occupied electronic states at the Fermi energy level, which effectively improves the carrier separation. The X-ray absorption spectroscopy (XAS) results verified the precise coordination environments of the doped Cu atoms, as well as confirmed the solid grafting of Ni ions on the catalyst surface. Furthermore, the hydrogen production rate of 1.2 % Cu–Zn 0.67 Cd 0.33 S–0.5 wt% Ni reached 38.17 mmol/g/h, corresponding to an apparent quantum efficiency of 35.5 %, which is 82.8 times higher than that of pure ZCS. Besides, the H 2 production rate can reached 118.73 mmol/g/h without cooling. Meanwhile, the synergistic strategy of manipulating the bulk and surface photo-charges of Zn 0.67 Cd 0.33 S also effectively enhances the photothermal effect and further improves its photocatalytic performance. This work provides different inspirations for bottom-up design of efficient photocatalysts to achieve synergistic facilitation strategies.
研究领域:
材料科学
·
能源化学
·
理论计算
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 7
·49854
·
IF 2.52
Xia Luo,Huan Hu,Jiajun Ma,Yawen Huang,Junxiao Yang
A new phosphorous/silicon/aluminum hybrid flame retardant (SAlu) was prepared by a surface grafting modification of alumina with a polymer (SDPS). The polymer was prepared by a condensation reaction between 3,9-dichloro-2,4,8,10-tetrahydroxy-3,9-diphosphate heterocyclic-3,9-dioxide [5.5] undecane (SPDPC) and diphenyldisiloxol. The structure of the SAlu was further characterized by Fourier transform infrared spectroscopy, X-ray diffraction, UV–Vis absorption, and particle size analysis. Thermogravimetric analysis showed that SPDS was grafted over 40% of the alumina surface. When introduced into epoxy resin, SAlu effectively improved the thermal stability and carbonization rate of the epoxy composites at high temperature. Carbonization studies showed that SAlu promoted formation of a ceramic-carbon coking structure with a porous morphology of aggregates, which isolate combustible materials, heat, and oxygen. These features improved the flame retardant performance of the composite. The solidified materials were evenly dispersed in the network structure to improve the elastic deformation ability and glass transition temperature of the solidified resin.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Hao Chen,Si-Miao Huang,Dong-Ting Zhang,Min-Peng Li,Chen-Yang Li,Yu-Ping Qiu,Xiao-Rui Wang,Tian-Peng Xu,Mao-Cheng Liu
The self-stacking of MXenes-Ti 3 CN limits the accessibility of nanochannels , reduces the ion diffusion kinetics, and hinders its application in alkali metal ion storage field. This study proposes a point-to-point mortise and tenon joining strategy to fabricate a composite structure of 1,4-phenylenediacetic acid-Ti 3 CN (1,4-PDEA-Ti 3 CN) by grafting rigid and flexible 1,4-phenylenediacetic acid (1,4-PDEA) into the amino-functionalized Ti 3 CN interlayers. The rigid and flexible 1,4-PDEA contributes to a pillar effect in the layered structure of Ti 3 CN, which is benefit to prevent the self-stacking and maintain a stable 2D layered structure. As a result, the interlayer spacing of Ti 3 CN is expanded from 1.20 to 1.46 nm and the Na + diffusion coefficient is improved from 1.16 × 10 −6 to 1.99 × 10 −6 cm 2 s −1 after point-to-point 1,4-PDEA grafting. The 1,4-PDEA-Ti 3 CN achieves a reversible discharge specific capacity of 202.3 mAh g −1 at a current density of 0.1 A g −1 after 770 cycles. Even at a high current density of 5 A g −1 , the 1,4-PDEA-Ti 3 CN still possesses a reversible discharge specific capacity of 137 mAh g −1 and it still maintains the high specific capacity of 256.1 mAh g −1 when the current density comes back to 0.1 A g −1 . This point-to-point mortise and tenon joining strategy provides a novel approach for designing other 2D energy storage materials with long cycle stability and high-rate capability.
研究领域:
材料科学
·
电化学储能
·
纳米材料
·
能源化学
·
二维材料
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Weishan Zheng,Junyi Zhou,Fang Chen,Shuchen Tu,Xinxin Xu,Hongwei Huang
Photocatalysis technology has promising application prospects in the treatment of water pollution. However, at present, the performance of photocatalytic pollutant degradation of photocatalysts is limited by the high recombination rate of photogenerated carriers and the low utilization rate of visible light. In this work, we develop a surface-I ion self-grafted CdBiO 2 I (CBOI-I) as an efficient visible-light photocatalyst via a facile precipitation route under ambient atmosphere. Compared with CdBiO 2 I, the self-grafted I ions allows CdBiO 2 I a grafting-concentration dependent light response range. With the increase in the grafting concentration of I ion, the absorption edge of CBOI-I red-shifts from 580 nm to 650 nm, with a band gap decrease of around 0.2 eV. In-situ Kelvin-probe force microscopy, photoluminescence spectra, photoelectrochemical tests and DFT calculation demonstrate, that the surface self-grafting of I ion on CdBiO 2 I enables the formation of surface localized electric field on the surface of the photocatalyst, which efficiently promotes the separation and transfer of photogenerated holes and electrons, producing more superoxide radicals and holes as reactive species. Thus, the optimal CBOI-I (CBOI-I4) exhibits an excellent photocatalytic performance for degradation of bisphenol A upon visible light illumination, in which the degradation rate reaches 94% within 60 min, beyond 4.9 times that of CdBiO 2 I. Besides, other contaminants, including tetracycline hydrochloride, aureomycin hydrochloride, rhodamine B, and methyl orange are also effectively degraded, demonstrating the photodegradation universality of CBOI-I. This work offers an alternative route for developing high-efficiency and broad-spectrum responsive via surface modification.
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
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·
IF 0.847
Rui Zhai,Yindi Zhu,Limei Chang,Zhigang Gu,Jian Zhang
Metal-organic frameworks with chiral feature (chirMOFs) are attracting great attention on circularly polarized luminescence (CPL). However, developing new efficient strategy to achieve or improve CPL properties is an urgent task. Herein, new chiral MOF thin films prepared by liquid-phase epitaxial layer by layer (lbl) growth method (SUR-chirMOF) are composed of D- or L-camphorate (D/Lcam) and aminopyrazine (Pr-NH 2 ) by using liquid phase epitaxial layer by layer (lbl) method. The resulted Zn 2 (D/Lcam) 2 Pr-NH 2 SURchirMOF shows strong chirality and luminescence but weak CPL emission at 390 nm. After lbl modifying a dye molecule FluoresceinIsothiocyanate (FITC), the chiroptical Zn 2 (D/Lcam) 2 Pr-NH-FITC SURchirMOFs with ~7 times CPL signal improvement and ~3 times g lum value amplification are obtained. This work provides a new strategy to develop chiral MOF thin films for CPL improvement using lbl grafting approach.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Shi-Lei Ji,Lu-Liang Wang,Ning Zhang
Clenbuterol (CLB) is a bronchodilator for treating respiratory disorders. However, the irrational use of CLB in animal feeding can cause serious risks to human health. The development of selective and efficient adsorbent for CLB removal is of great significance. Herein, we report a convenient covalent grafting approach for the fabrication of molecularly imprinted covalent organic framework (COF) for selective adsorption and removal of CLB from environmental water and milk samples. By integrating the merits of both molecularly imprinted polymers (MIPs) and COFs, the molecularly imprinted COFs named BatBt-MIPs (2,5-bis(allyloxy)terephthalohydrazide, Bat; 1,3,5-benzenetricarboxaldehyde, Bt) presented the alluring traits of large surface area, tailored-made binding sites, uniform pore structure, and good selectivity for CLB. The adsorption equilibrium for CLB on BatBt-MIPs was quickly reached within 20 min and followed pseudo-second-order kinetic model. BatBt-MIPs showed a CLB adsorption capacity of 15.45 mg/g, which is about 3.7 times higher than that of non-imprinted COFs (BatBt-NIPs). Compared with BatBt-NIPs, BatBt-MIPs present improved adsorption selectivity for template CLB. Selective removal of CLB from complex environmental water and milk samples on BatBt-MIPs was also realized. This work provided a new covalent grafting approach to construct novel molecularly imprinted COFs and highlighted the great potential of COF-MIPs in contaminants elimination.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 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）