JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 37
·e55934
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IF 2.7
Feng Zhou,Yu Dai,Wei Qin,Zhenyong Li,Yu Song,Fuli Bian,Quanwei Song,Xianyan Ren
Existing adsorption materials with drawbacks in the weak organic solvents/oil retention ability, slow adsorption speed and low adsorption capacity for alkanes still hardly meet demands of the application field, especially in emergencies. The copolymerization of the long-chain alkenes, 1-octene, with isoprene was designed in this paper to synthesize an adsorption resin (PIOT), instead of acrylate monomers reported in the literature. And trimethylolpropane triacrylate was designed as a crosslinking agent. Results show that the PIOT grows in the form of powders, which are the loose accumulation of nanoflakes with a diameter of about 47.89 ± 11.06 nm. In view of the chain structure and morphology of the PIOT, it can quickly reach the maximum adsorption within 10 s along with a high adsorption capacity for various solvents and kerosene. Even for hexane, the adsorption capacity of the PIOT increases by 345.2% compared with the reported adsorption resin. The oil retention rate of PIOT can be maintained at 86 ± 6% after centrifugation at 1000–3000 rpm for 5–25 min. Compared with commercial activated carbon, the PIOT has outstanding advantages in recycling property and oil retention rate and compared with the reported acrylate adsorption resin, the PIOT has made a great breakthrough in adsorption capacity for alkanes.
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
BIOMASS & BIOENERGY
·
2020
·
IF 3.551
Zhoutian Ding,Tong Zhao,Qing Zhu,Shengyun Liao,Liangmin Ning,Yadong Bi,Hui Chen
The key technical issues for establishing an economical and advanced deoxygenation process of vegetable oil for producting the diesel-like hydrocarbons are to develop the low-cost non-sulfided heterogeneous catalytic systems with good performance. Herein, we report two facile strategies for preparing Co-based catalysts in an effort to explore the highly efficient heterogeneous catalysts for the deoxygenation of laurate ester. Interestingly, the deoxygenation paths can be regulated by altering the synthesized methods of the Co-based catalysts. For example, the Co-MOF-700 catalyst prepared via pyrolysis of one cobalt metal-organic framework (Co-MOF: [Co(tia)(H 2 O) 2 ] n , tia 2− = 5-(1 H -1,2,3-triazol-1-yl) isophthalate) at 700 °C under N 2 atmosphere for 4 h can orient the catalytic hydrogenation of laurate ester towards decarboxylation/decarbonylation with full conversion and 67.6% selectivity of undecane. While, Co/ZSM-5 synthesized through impregnation-reduction method can promote transformation of methyl laurate to dodecane via hydrodeoxygenation path, in which the conversion and selectivity can be up to 100% and79.12%, respectively.
研究领域:
催化化学
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能源材料科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Song Han,Xiang Cheng,Longheng Xiao,Xiangtao Huo,Min Guo,Mei Zhang
The self-assemble hydrophobic aerogel-like hollow boehmite microspheres adsorbents were prepared by surface silylation modification method using methyltrimethoxysilane silanizing agent. The density of the adsorbents was as low as 0.1 g/cm 3 , the average pore diameter was 12.2–15.3 nm, and the water contact angle was 130°∼143.8°. The hollow microsphere adsorbents could uptake 8.51 g/g for engine oil , 8.42 g/g for peanut oil, 7.29 g/g for kerosene and 5.80 g/g for n-hexane. After 20 regeneration cycles in n-hexane, the regeneration rate of the adsorbent was still as high as 95.17 %，meaning adsorption capacity of the adsorbent did not decrease significantly. The aerogel-like hollow boehmite microspheres with good hydrophobicity can be used as a kind of potential candidate material to remove different oils and organic liquids.
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
CARBON
·
2017
·
IF 6.337
Jianliang Xiao,Jifei Zhang,Weiyang Lv,Yihu Song,Qiang Zheng
Comprehensive treatment of multifarious contaminations in waterbody demands multifunctional adsorbents with easy reusability , high efficiency, and broad-spectrum adsorption performance. Herein hydrothermally reduced graphene oxide/poly (vinyl alcohol) (TRGO/PVA) aerogels fulfilling these requirements were developed via a facile and green in situ hydrothermal reduction followed by direct sol-aerogel transformation strategy. The interfacial interaction between TRGO sheets and PVA macromolecules as proved by various methods could effectively prevent TRGO from aggregation, which improves mechanical and adsorption performances and assures reusability of aerogels. The aerogels demonstrate an attractive broad-spectrum universality in adsorbing diverse cationic, anionic and nonionic dyes, surpassing most adsorbents that could only remove either positively or negatively charged dyes. The aerogels demonstrate a promising synergetic effect for adsorption two oppositely charged dyes, exhibiting the highest total adsorption amount (>900 mg/g) among known absorbents for removing mixed dyes. Besides, the aerogels after hydrophobic modification are able to effectively adsorb common oils and organic solvents spilling on water. Furthermore, the aerogels are compressible, dimension stable and solvent resistive and can be easily regenerated, bringing a great superiority in the comprehensive treatment of multiple contaminations in waterbody.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
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2022
·
IF 11.072
Feng Long,Xincheng Cao,Peng Liu,Xia Jiang,Jianchun Jiang,Xiaolei Zhang,Junming Xu
Efficient deoxygenation for the bio-derived fatty acid is paramount to producing diesel-like alkane and usually requires harsh reaction conditions. Here, we reported an efficient conversion system for the photocatalytic conversion of fatty acid over Pt/TiO 2 catalysts and acid conversion higher than 99.0% (yield nearly 84.5%) under the mild conditions 30 °C, 0.1 MPa H 2, and 365 nm light. X-ray photoelectron spectroscopy (XPS) and Density Functional Theory (DFT) calculations suggest that the oxygen vacancies TiO 2 can achieve the charge transfer from TiO 2 support to Pt clusters. The electron-rich Pt cluster can promote hydrogen spillover to form a hydrogen-rich surface. Thus, it leads to the photo-decarboxylation C n-1 alkyl radical being amenable to proton hydrogenation to produce C n-1 alkane. Detailed characterization demonstrates that 0.50 wt% Pt/TiO 2 has superior photocatalytic performance. Introducing the Pt atoms can promote the formation the oxygen vacancies and reverse charge transfer, which determines the acid adsorption and conversion mechanism.
研究领域:
化学工程
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材料科学
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能源科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2013
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IF 5.008
Yan Hu,Xiaoyan Liu,Junchen Zou,Ting Gu,Wenbo Chai,Hongbing Li
The preparation, by a freeze–thaw method, of new graphite/isobutylene-isoprene rubber (IIR) sorbents for oil and organic liquid is described. Graphite was expected to improve the adsorption properties. The cryogels were prepared by solution crosslinking IIR rubber in the presence of graphite in benzene at various temperatures, using sulfur monochloride as the crosslinker, and characterized by SEM and contact angle measurements. The dried cryogels, with interconnected macropores were sponge-like soft materials, with excellent buoyancy and hydrophobicity. They also showed excellent sorption characteristics, with the best sample exhibiting maximum sorption capacities of 17.8 g g–1 for crude oil, 21.6 g g–1 for diesel oil, and 23.4 g g–1 for lubricating oil, respectively. The samples also showed excellent sorption capability for organic liquids, absorbing up to around twenty times their own mass. After rapid and effective desorption, taking just 3–5 h, the cryogels were recovered. They could also be reused more than 30 times by simply centrifuging to remove the sorbed liquid. These characteristics mean that the cryogels prepared in this study are promising materials for removal of large-scale oil or toxic organic spills.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
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2015
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IF 3.615
Junmei Liang,Ranran Ding,Yulong Wu,Yu Chen,Kejing Wu,Yongqiang Meng,Mingde Yang,Yaowu Wang
Hydrotreatment of heteroatomic model compounds in microalgae-based bio-oils into diesel-like hydrocarbons was carried out over carbon nanotubes (CNTs)-supported β-Mo 2 C catalyst with superior activity and selectivity under a mild condition (≤200 °C). The results show that stearic acid and hexadecanamide can be completely converted into n -C 15 –C 18 alkanes over β-Mo 2 C/CNTs catalyst. The β-Mo 2 C/CNTs favors the pathway of hydrogenation–dehydration–hydrogenation to produce n -octadecane with an optimal yield of 91.24% at a lower temperature of 180 °C during hydrotreating process of stearic acid. The recycle tests demonstrate that the β-Mo 2 C/CNTs exhibits excellent stability, and can be reused for seven times consecutively without reduction of catalytic stability. Based on the determined products, a brief reaction pathway is proposed. Therefore, a novel approach to produce diesel-like hydrocarbons via catalytic hydrotreatment of microalgae-based bio-oils over β-Mo 2 C/CNTs is introduced, which provides a basic research as well as technical parameters for its further industrialization.
研究领域:
能源生物学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2014
·Vol. 6
·期 12
·3482-3492
·
IF 5.044
Liangguang Chen,Junying Fu,Lingmei Yang,Zibo Chen,Zhenhong Yuan,Pengmei Lv
Graphical Ni wanna live forever: A Ni/Hβ zeolite catalyst is applied to the hydrotreatment of fatty acid methyl esters (FAMEs). The metallic and acidic functionalities of Ni/Hβ zeolite catalysts show a synergy in hydrodeoxygenation, which proceeds without carbon loss and with high FAME conversions and yields of liquid C 16 and C 18 alkanes. The reaction scheme of the whole FAME transformation is investigated by using a batch reactor. A Ni/Hβ zeolite catalyst was prepared for the selective transformation of fatty acid methyl esters (FAMEs) into diesel-like alkanes through hydrotreatment. Characterization of the physicochemical properties of a 10 wt % nickel-loaded, Hβ zeolite support indicated that nickel(II) oxide aggregated into large particles approximately 23.9 nm in size, whereas nickel aggregated into particles 18.3 nm in size, significantly increasing the total acid sites of Hβ zeolite after hydrogen reduction. The reaction scheme of the whole FAME transformation was investigated by using a batch reactor. It was found that FAMEs were first hydrogenated mainly to saturated fatty acids, followed by hydrodeoxygenation without carbon loss, the main route toward alkanes. The hydrotreatment of FAMEs by decarboxylation or decarbonylation was favored at high temperatures and low hydrogen pressures on Hβ zeolite with higher nickel loadings. The metallic and acidic functionalities of nickel/Hβ zeolite catalysts exhibited a synergistic effect in hydrodeoxygenation without carbon loss, achieving high FAME conversion and yields of liquid C 16 and C 18 alkanes. Optimal catalytic performances were obtained with 10 wt % nickel loading over Hβ zeolite (Si/Al=25) at 270 °C with a pressure of 1.0 MPa H 2 over 8 h. A maximum alkane product yield of 93.2 % was achieved for C 15 –C 18 alkanes with complete FAME conversion. 80.3 % FAME conversion could was achieved after eight reaction cycles by using the nickel/Hβ zeolite catalyst with calcination after every use.
研究领域:
催化化学
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可再生能源
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Subhan Mahmood,Na Liu,Jieyu Wu,Xinyi Xu,Shun Yao
The disposal and utilization of discarded masks have gained social attention, especially during the COVID-19 pandemic. The need to explore environmentally friendly ways to minimize their negative impacts and convert them into valuable materials is crucial. Deep eutectic solvents (DESs), which are known for their desirable green chemistry attributes, offer an attractive strategy for polymer processing. In this study, four model DESs—constituting hydrogen bond acceptors like choline chloride or benzyltriethylammonium chloride and donors such as oxalic acid or p-toluenesulfonic acid monohydrate—were selected to process polypropylene surgical masks after preliminary screening. The DESs were characterized using infrared spectroscopy and evaluated for basic physicochemical properties like viscosity, conductivity and pH values. A continuous heating strategy was developed to improve the treatment process, and the contribution of DES on the degradation was evaluated through microscopic structure examination, fluffiness, density, and particle metrics analysis. Gel permeation chromatography was also used to analyze the degraded products. The resulting powders form of mask material was then explored for gasoline and diesel fuel adsorption. The modified material showed up to 4.06-fold improvement in adsorption capacity, with maximum uptake of approximately 40 g/g. Oil adsorption reached equilibrium in 10 to 15 min, and the powder material also exhibited enhanced oil retention and reuse after desorption. This research provides a feasible strategy for recycling polypropylene-based medical waste and encourages the development of effective oil sorbents from waste masks.
研究领域:
环境科学
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高分子化学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Jianping Chen,Xinjie Huang,Limin He,Xiaoming Luo
Foaming of oils often confronts researchers in food, cosmetics, and petrochemical industries. Destabilization or stabilization of nonaqueous foams is fundamentally crucial for process control and product quality. Antifoams can be a useful method to control excessive foams. Nonetheless, the foaming mechanisms and the selection criteria of the most common antifoam, poly(dimethylsiloxane) (PDMS) oils, are not thoroughly discussed. The study of inorganic colloidal particles as foam stabilizers has drawn particular attention over the past years practically and academically, yet only a small part of literature focuses on nonaqueous foams. For these reasons, we have studied the effects of PDMS oils and silica nanoparticles on the foaming of oils. We find that the performance of silicone oils as crude oil antifoams is firmly related to PDMS viscosity and crude oil composition presumably because the solubilization of PDMS oils in hydrocarbons reduces with increasing viscosity of the polymers and the hydrocarbons. The findings also illustrate that nanoparticle hydrophobicity and concentration are the primary factors for the foam stabilization effect.
研究领域:
化学工程
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材料科学
·
表面科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 29
·期 4
·1001-1009
·
IF 2.523
Liu Hongwei,Li An,Liu Zhanchao,Tao Qiantu,Li Jun,Peng Jianbo,Liu Yan
In the present work, an excellent carbon aerogel (PCA) with low density, hydrophobicity and porous structure has been successfully prepared by hydrothermal carbonization, freezing-drying and post-pyrolysis process based on the abundant and environmental friendly natural biomass discarded shaddock peel as raw material. The results indicated that PCA exhibited low density of 18.6 mg/cm 3 , favorable hydrophobicity with water contact angle of 121° and porous structure properties. Owing to these intrinsic advantages of PCA, it demonstrated superior adsorption capacity (23 ~ 48 times to its own weight) for selectively adsorption oils and organic solvents. Furthermore, combustion and distillation can be employed to recover PCA and harvest pollutants. And PCA was regenerated and found to be suitable for reuse in successive adsorption–desorption cycles six times without significant loss in adsorption capacity. All the above results suggested that the prepared PCA has a great potential for application in eliminating spilled oils and environmental protection.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
·
2024
·
IF 6.8
Jinyan Tan,Fan Liu,Xiaoxue He,Lin Gao,Linsheng Wu,Xianbao Shi,Jing Li,Yanfei Chen,Yanhua Liu,Yongbing Sun,Zhixiao Zhang,Zhonggui He,Qikun Jiang,Jin Sun
Lipid nanoparticles (LNPs) have been utilized to deliver small interfering RNA (siRNA) to treat acute liver injury. However, LNPs exhibit suboptimal lysosomal escape capabilities and biodegradability. To address these limitations, we have designed triglyceride-mimetic ionizable lipids by conjugating N,N-dimethyl tertiary amine head groups to the sn-2 position of triglyceride (TG) through ester bonds. These ionizable lipids were abbreviated as 2C-TG, 3C-TG, and 4C-TG, with N,N-dimethyl tertiary amine head groups located in the β-, γ-, and δ-positions of the ester linkage bond, respectively. The uniform-size LNPs were prepared by using the ethanol dilution method. Notably, the position of the tertiary amine head group within the carbon chain of triglyceride-mimetic ionizable lipids is found to significantly influence critical parameters, including the encapsulation rate, pKa, cellular uptake, lysosomal escape, lipase release, and gene silencing efficiency. Our findings hold promise for improving the efficacy and safety of LNP-based siRNA therapeutics.
研究领域:
分子生物学
·
药物递送系统
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）