CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Yahao Dong,Jiajun Bi,Shujun Ming,Shoute Zhang,Dajian Zhu,Di Meng,Tao Li
Chitosan is a versatile polysaccharide in different domains due to facile modification and good biodegradability. In this paper, taking advantage of such functional properties, we have developed a stabilizer agent [OCMCS-SB] produced from chitosan, and palladium was successfully immobilized on this designed stabilizer [OCMCS-SB-Pd(II)]. The obtained complex was illuminated by 13 C CP-MAS NMR, FT-IR, TGA, XRD, XPS, SEM, TEM and ICP-OES analyses. Due to the interactions of primary hydroxyl groups on chitosan, Schiff base and carboxy groups, the Pd complex showed excellent reactivity (up to 99 %) and stability towards Suzuki reactions in eco-friendly medium. Subsequently, the reusability experiments for OCMCS-SB-Pd(II) formed from chitosan were examined in five consecutive cycles, which showed no appreciable decrease in activity. Furthermore, a reasonably trifunctional complex structure was proposed. The present bio-based system offers a promising approach in utilizing such biopolymers in organic transformations.
研究领域:
生物化学
·
有机化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2013
·
IF 2.206
Ying Tian,Xuan Meng,Li Shi
The novel ionic liquids with an alkane sulfonic acid group were prepared and used for removal of trace olefins from aromatics (referred to as oil). The structures and acidities of the ionic liquids were experimentally characterized and systematically analyzed. The influences of various reaction parameters, such as the stirring speed, viscosities of the ionic liquids, molar fraction of ZnCl2, dosage and type of ionic liquid, reaction temperature, reaction time, and the reusability of the ionic liquid, were investigated. It was found that the ionic liquid 1-(3-sulfopropyl)-3-methylimidazolium bromochlorozincinate ([C3SO3Hmim]Br-ZnCl2) with the molar fraction of ZnCl2 of 0.67 exhibited a better performance for olefin removal. Meanwhile, the experimental results showed that after the reaction had taken place at 373 K for 1 h, olefin conversion of 29.54% was obtained with the mass ratio of IL to oil of 0.2. Even though the reusability of the ionic liquid was not good, the separation of the reaction mixture can be performed by simple decantation.
研究领域:
化学工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yi Qin,Bo Chai,Chunlei Wang,Juntao Yan,Guozhi Fan,Guangsen Song
A porous biochar (BC) was prepared using the recycled agricultural waste rape straw as resources by combining high temperature carbonization with KOH activation procedure, and applied into tetracycline hydrochloride (TC) adsorption. The multiple characteristic techniques were adopted to investigate the structures and properties of as-prepared BC. The results demonstrated that the BC activated by KOH would possess the more graphite-like structures, more abundant oxygen-containing functional groups, and larger specific surface area (1531 m 2 /g) comparing with unactivated BC, which were favorable for the TC adsorption. The effects of initial TC concentration, solution pH value, salt ionic strength and adsorption temperature on the adsorption performances were explored in detail. The adsorption data could be well fitted by the pseudo-second-order kinetic model and Freundlich isothermal model. The maximum adsorption capacity of KOH activation BC could reach 325.07 mg/g at 30 °C. The endothermic and spontaneous properties of the adsorption system was implied by thermodynamic study. The adsorption TC mechanism of KOH activation BC was involved in the pore filling, π-π electron donor-acceptor interaction, hydrogen bonding and electrostatic action. Regeneration experiments showed that the TC removal efficiency could still attain 97.0% even after six cycling experiment, suggesting that the BC had the excellent reusability and stability. These results indicate the feasibility of a win-win strategy for the application of agricultural waste to water remediation.
研究领域:
环境科学
·
农业资源利用
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 332
·期 6
·1953-1960
·
IF 1.6
Luo Qingyun,Wang Chongshi,Zhu Wei,Yu Hongchao,Wang Chunyan,Chen Chuanhong
Due to its high adsorption capacity and adsorption efficiency, polymer gel shows excellent performances in the treatment of wastewater containing thorium. In this work, glutaraldehyde cross-linked N -(4-Aminobenzoyl)-ʟ-glutamic acid modified chitosan (CCS-AGA) was used to adsorb Th(IV) ions from aqueous solutions for the first time. FT-IR and SEM results revealed the chemical structure and surface morphology of this material. The influence of solution pH, contact time and initial concentration of Th ions on the adsorption of Th(IV) by CCS-AGA was investigated. The experimental data suggest that the adsorption behavior of CCS-AGA could be accurately predicted by the Langmuir model. The maximum theoretical adsorption capacity of CCS-AGA for Th(IV) was 162 mg/g. Moreover, this material exhibited excellent reusability and adsorption selectivity for Th(IV).
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
Materials Horizons
·
2025
·
IF 10.7
Yuxian Su,Tianfu Song,Li Liu,Shipeng Wen
In recent years, liquid-crystalline polymers containing azobenzene moieties that show phototunable glass transition temperatures, have been successfully used in adhesion, reversible mechanical actuation, athermal nano-imprinting, self-healing, energy storage, and other applications. Unfortunately, the physical principles and properties underlying the dynamic equilibrium behaviors when both trans and cis isomers are triggered simultaneously remain elusive, and experiments are challenging due to the difference in penetration depth between ultraviolet and visible light sources. Here, we develop a novel environmentally friendly adhesive with near-infrared (NIR) light-driven and reusability through the integration of highly efficient UV/Blue-emitting upconversion particles (UCNPs) and siloxane main-chain azobenzene molecular photoswitch, and achieve simultaneously bicolor emissions inside the composite by facilely modulating the external excitation power, triggering both the trans and cis isomers. We numerically and experimentally show these azobenzene molecules inside the composite exhibited the dynamic equilibrium of partial trans-isomer → cis-isomer and cis-isomer → trans-isomer transitions under the NIR irradiation of high power and low power, respectively. Under high-power NIR light excitation, the high-intensity dynamic isomerization reaction of the complex not only produced "free volume expansion" but also led to structural changes at the condensed scale, thereby significantly decreasing its elasticity and viscosity. In addition, robust switching of its adhesion strength was demonstrated over six cycles. This study shows that the combination of azobenzene polymers and upconversion luminescent materials has great application potential as NIR photoresponsive materials.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO
·
2018
·
IF 1.1
Jie Lian,Jiwei Li,Liang Wang,Ru Cheng,Xiuquan Tian,Xue Li,Jian Zhou,Tao Duan,Wenkun Zhu
Environmental and energy issues have always been a hot topic of global research. Oil leakage has caused great damage to the environment, affecting a wide area and it is difficult to clean up. In most cases, carbon-based adsorbents are typically utilized to remove oil spills because of their economic benefits and high adsorbent efficiency. At the same time, its excellent material properties can also be used for the preparation of supercapacitors. In this paper, the carbon aerogels were prepared by the one-step method. The prepared materials endowed a 3D network structure with a huge number of micropores and mesoporous, and the material is light-weight, stable, hydrophobic and has affinity for oil (17.02 g/g) to the KGM carbon aerogel. Through the physic-chemical characterization, the KGM carbon aerogel shows specific surface area is 689 m 2 /g, high water contact angle (136.64 ∘ ) and excellent reusability (more than 15 cycle times). In addition, we also discussed the electrochemical properties of the material and obtained the specific electrical capacity of 139 F/g under the condition of 1 A/g.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Chunliang Zhao,Jinghui Wu,Yidi Gao,Jialin Zhou,Leilei Zhang,Chi Wang,Yang Huo,Xianze Wang,Mingxin Huo
The rapid increase in PLA product consumption has led to significant environmental challenges. To address this issue, this study focuses on developing efficient catalysts to accelerate PLA alcoholysis, aiming to enhance degradation efficiency. A novel composite catalyst, SiWMn Ⅲ @MIL-125(Ti), was synthesized by encapsulating Keggin-type polyoxometalate (POM) in the octahedral cavities of MOF(MIL-125(Ti)). The compound was comprehensively characterized, while density functional theory (DFT) calculations further confirmed the potential localization of POM within the MOF. The catalyst exhibited excellent efficiency in the alcoholysis of polylactic acid (PLA) using ethylene glycol (EG) under optimum conditions (1 wt% catalyst, 160 °C, 30 min, EG/PLA molar ratio = 4:1, 18 % POM loading), achieving high PLA conversion. The liquid products were systematically analyzed, proposing their oligomeric structures. Notably, this heterogeneous catalyst could be easily retained by filtration and could be reused for more than 10 cycles without significant activity loss. Combined with DFT simulations, a reasonable catalytic mechanism was elucidated, highlighting the synergistic role of POM@MOF in facilitating alcoholysis of PLA. This work not only provides insights into the design of efficient MOF-based catalysts for polymer degradation but also suggests the potential applicability of POM@MOF systems in other depolymerization processes.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Haoyu Jia,Jinyue Hu,Le Zhao,Xiaoke Zheng,Weisheng Feng
Baohuoside I, a valuable flavonoid derivative of Herba Epimedii , exhibits superior bioactivities compared to its precursor, icariin. The conversion of icariin to baohuoside I using β-glucosidase (β-G) is an efficient approach for industrial production. Herein, β-G was successfully immobilized into a porous materials metal-organic frameworks (MOFs) via a simple one-pot coprecipitation method. The β-G@MOF biocomposite exhibited high encapsulation efficiency and excellent tolerance to extreme pH, high temperature, organic solvent and glucose. Remarkably, β-G@MOF retained its full initial activity even at 200 mM glucose. The β-G@MOF has a lower K m value compared with the free β-G, indicating enhanced substrate affinity. A conversion of 99.8 % was achieved in the hydrolysis of icariin to baohuoside I within 2 h. Additionally, β-G@MOF exhibited significantly reusability, maintaining 70.5 % yield after eight cycles at 60 °C. This study provides a simple, efficient, and sustainable approach for industrial production of baohuoside I and has potential for hydrolyzing other poorly soluble flavonoids.
研究领域:
生物化学
·
材料科学
·
药物生产
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yaqin Zhu,Gaigai Duan,Haoqi Yang,Jingquan Han,Xiaoshuai Han,Chunmei Zhang,Haimei Mao,Hongliang Zhao,Shuijian He,Shaohua Jiang
Antibiotic pollution is a crucial global environmental issue, and it is necessary to develop simple, economical, and effective filtration materials for the removal of antibiotics from water. Wood, a plentiful and ecofriendly natural material characterized by a hierarchical porous architecture, robust mechanical strength, and abundant functional groups, has been adopted as an adsorptive filter for water purification. However, the mechanism of natural wood filters for removing pollutants from water has not been analyzed. In this study, we prepared three wood filters (balsawood, basswood, and Chinese fir) with different pore structures for the removal of the tetracycline (TC) antibiotic. We systematically investigated the structures and properties of the three wood filters to establish clear structure–property-performance relationships. By comprehensively considering the flux and TC removal efficiency, we selected the basswood filter as the optimal filter and further discussed the removal efficiency of the basswood filter and its removal mechanism for TC. When using five basswood filters, after continuously treating 120 mL of 0.5 mg L–1 TC solution at 5000 L m–2 h–1, a relatively high removal efficiency of over 85% could still be achieved. The filters retained ∼80.5% of their removal efficiency after five regeneration cycles, demonstrating excellent reusability. The further studies prove that there are three primary interaction forms in the process of TC removal by the basswood filter, which are electrostatic interaction, hydrogen bonding interaction, and π-π interaction. This is expected to be widely applied in actual wastewater treatment.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuhong Tao,Chengqi Feng,Juncheng Huang,Haining Na,Jin Zhu
Phosphotungstic acid hydrate (HPW)-doped hydroxyl-rich hydrothermal carbon-coated fibrous silica catalyst (FS@C/HPW) is fabricated to induce the highly efficient hydrolysis of cellulose to sugar in an ultra-low acid aqueous system. The obtained FS90@C/HPW12 owns good thermal stability under 200 °C and the highest specific surface area at 28 m 2 /g. Owing to its special fibrous microstructures, FS90@C/HPW12 can cause linear damage and structural fragmentation on the surface of cellulose during hydrolysis. Accordingly, rather highly efficient hydrolysis with the cellulose conversion of 100 %, total reducing sugar and glucose yields at 92.2 % and over 85 % is achieved in the aqueous system with FS90@C/HPW12 and 5 mmol/L H 2 SO 4 . FS90@C/HPW12 also exhibits good reusability in multiple hydrolysis. This research provides a particular way for the design and synthesis of solid catalysts to induce the highly efficient hydrolysis of cellulose to sugar by chemical catalysis in a full aqueous system.
研究领域:
生物化学
·
材料科学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 9
·期 6
·2101786
·
IF 6.147
Meijin Zhao,Wenshuai Zhang,Dan Wang,Peipei Sun,Yuanyuan Tao,Lingxiao Xu,Lei Shi
Flexible strain sensors based on conductive hydrogels show great potential in wearable devices, electronic skins, and bioelectronics. However, hydrogels inevitably exhibit poor durability for long-term usage due to the water loss by evaporation. Herein, an external packaging strategy is demonstrated for fabricating sandwich-like packaged hydrogel strain sensors (PHSSs) through the combination of conductive hydrogel injection and subsequent packaging via a photopolymerization procedure. The as-prepared PHSS consists of two functional parts, internal hydrogel conducting wires exhibiting excellent linear strain sensing performance as sensing element and an external packaging hydrogel layer with good transparency and conformal adhesion to human skin. Thanks to these intriguing merits, the PHSS possesses the capability to detect both the large-scale and subtle human motions precisely. Particularly, compared to conventional naked hydrogel strain sensors, the lifespan of PHSS is proved to be remarkably enlarged benefiting from the protective effect of external packaging layer towards the embedded hydrogel sensing element. Besides, the swelling property of external packaging layer even after severe dehydration enables the sensor to be reusable. This work provides a new approach for the fabrication of flexible strain sensors with enhanced lifespan and good reusability.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Xuexia Zhang,Hankun Wang,Zhiyong Cai,Ning Yan,Minghui Liu,Yan Yu
Cellulose-based aerogels show great potential as absorbents for oil and chemical spill cleanup due to their low density and excellent absorption capacity. However, the hydrophility and inferior mechanical properties have often limited their practical applications. In this study, high-performance biomass-based aerogels were prepared by freeze-casting aqueous suspensions of polyvinyl alcohol and cellulose nanofibrils in the presence of hydrolyzed methyltrimethoxysilane sol. Successful silylation on the substrate surface was confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermal stability, and water contact angle measurements. Freeze-casting successfully assembled a highly aligned interconnected porous structure, resulting in the prepared aerogels with high modulus and strength in the aligned direction (along the freezing direction) and outstanding compression flexibility in the perpendicular direction (transverse to the freezing direction). The ultralow density (10.2 kg/m3), high hydrophobicity (water contact angle of 140°), and good compressive recovery (84% recovery of its original thickness after 100th compression tests) allow the aerogel to absorb oils and organic solvents 45–99 times higher than its own weight. Meanwhile, good reusability was also observed with an absorption capacity greater than 84% after 35 absorption–squeezing cycles. The novel aerogels prepared in this study are expected to have great potential for application in treating oil and chemical spills.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）