JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Lingling Xie,Guangmei Cao,Hui Su,Ziheng Jin,Qin Peng,Tianqiao Xie,Hualin Wang,Xia Jiang
The catalytic hydrodeoxygenation (HDO) of bio-oil, represents a promising route to produce hydrocarbon bio-fuels as potential replacements for traditional fossil fuels. Constructing catalysts with heterostructure interface have emerged as an effective strategy to tune the HDO performance of non-noble metal sites. In this work, defect-rich nitrogen-doped carbon supported Co-based heterostructure materials (Co@NC) were fabricated by low-temperature pyrolysis process of well-defined zeolitic imidazolate framework-67 (ZIF-67) modified with chitosan. The designed Co@NC-480 catalyst exhibited 100 % guaiacol conversion and 94.6 % cyclohexane product selectivity at 250 °C and 3.0 MPa H 2 pressure for 4 h, as well as achieved the conversion of crude bio-oil to hydrocarbon fuel with 69.2 % selectivity. Experiments and characterizations demonstrated that introduction of moderate chitosan induced the construction of Co/NC interface, which facilitated electron transfer between the metal Co sites and defect-rich N-doped carbon support to form synergistic metallic Co and electron-deficient Co sites, promoting the efficient HDO of guaiacol to cyclohexane. Furthermore, combining with in-situ DRIFTS revealed the evolution pathway of cycloalkanes through guaiacol catalytic fast hydrogenation of aromatic ring and rate-determined C-OH hydrolysis of cyclohexanol. In addition, the confine-temperature pyrolysis strategy of metal organic frameworks opens a new pathway toward heterostructure catalyst with high dispersed and small size of metal particle.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jiajia Kong,Yanqing Liu,Lejie Wang,Jin Yang,Jipeng Men,Dongzhi Chen
Silicon nanocrystals (SiNCs) have triggered tremendous attention both in academia and industry due to their size-tunable optical properties, exceptional biocompatibility and environmental benignity. However, their less than 10 % synthetic yield and high reactive surface severely impede practical applications. Herein, we propose a strategy for gram-scalable preparation of polystyrene-capped SiNCs (PS-SiNCs) by an AIBN-initiated thermal hydrosilylation. The resulting PS-SiNCs exhibit a near-infrared emission centered at 838 nm with an absolute quantum yield of 13.28 %, and exceptional environmental stability even after storage for 180 days under ambient conditions. Subsequently, a novel nanocomposite ink is developed by incorporating the PS-SiNCs into a polydimethylsiloxane (PDMS) matrix reinforced with vinyl-terminated MQ silicone resin. Both printability and practicability of the PS-SiNCs/PDMS nanocomposite ink are examined on flexible substrates including cotton fabric and cellulose paper through screen-printed technique. Interestingly, the customized labels exhibit distinguishable and full patterns with NIR-I fluorescence under 365 nm UV lamp, demonstrating a promising anti-counterfeiting application. Notably, these screen-printed patterns show unprecedented PL stability even after immersed in various aqueous solutions and organic solvents. This work not only presents an innovative strategy for scalable preparation of stable and eco-friendly NIR-I luminescent materials, but also pave a new way to advanced anti-counterfeiting applications.
✓ 已验证
产品关联
DOI
高影响因子
Lubricants
·
2023
·Vol. 11
·期 4
·156
·
IF 3.5
Yuanyuan Li,Chen Chen,Qiong Tang,Lei Liu,Jinxiang Dong
Alkylnaphthalene as base oils are widely applied in the production of high-performance lubricating oils. Here, we report the synthesis of multi-butylnaphthalenes by alkylation of naphthalene andn-butene with trifluoromethanesulfonic acid as catalyst. Trifluoromethanesulfonic acid exhibited excellent catalytic performance with naphthalene conversion, as high as 98.5%, and the multi-butylnaphthalenes selectivity of 98.8% under optimum conditions. To investigate the effects of the side-chain numbers on naphthalene on the lubrication performance, two kinds of alkylnaphthalenes were obtained by controlling catalyst dosage, denoted as MBN-1 (90.3% mono/di-butylnaphthalenes) and MBN-2 (98.2% tri/tetra/penta/hexa-butylnaphthalenes), respectively. The primary physiochemical properties of the synthetic oils were tested, and their tribological performance was evaluated. MBN-2, with more side chains on naphthalene, displayed more effective friction reduction and anti-wear properties than MBN-1 and the commercial alkyl naphthalene base oil AN5.Keywords:naphthalene;trifluoromethanesulfonic acid;alkylation;synthetic lubricating base oil
✓ 已验证
产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2023
·
IF 8.1
Yuanyuan Shao,Xiaoqiong Liu,Zhuoya Zhang,Pengxiang Wang,Kaikai Li,Chunmei Li
The unique flavor and aroma characteristics of huajiao were not only influenced by cultivated varieties, maturity, but also geographic origin. This study compared the terpenoids of 48 species of huajiao using headspace solid-phase microextraction–gas chromatography-mass spectrometry (HS-SPME-GC–MS) and electronic nose (E-nose). The E-nose results showed differences in huajiao from different origins and varieties, and from the PCA loading plots it was possible to conclude that some samples contained higher levels of hydrocarbons and alcohols, providing a preliminary discrimination between different species of huajiao. Further, GC-MS results showed that six key biomarkers could be used to distinguish red and green huajiao. Red huajiao in Central China contained more terpenoids than in other regions. Nine key biomarkers could be used to distinguish red huajiao from different regions. Oil huajiao exhibited a more distinct aroma in red huajiao. Green huajiao from Yunnan Province had more terpenoids than that from other provinces. The terpenoids content of Yunnan zhuyeqing was higher than other green huajiao. Heatmap analysis helped to find the most contributors of huajiao, which could be used as key terpenoids to differentiate huajiao of different regions or cultivars. Finally, through the correlation analysis of E-nose and GC-MS, it was found that the E-nose sensors could distinguish different huajiao by specific responses to some terpenoids in the samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2023
·
IF 5.7
Miao Fei,Lei Ni,Tianyi Yan,Juncheng Jiang,Hang Yao,Han Zhang,Chenwei Dai
Background The synthesis of tert-butyl hydrogen peroxide (TBHP) is a two-step strong exothermic reaction. In this paper, the exothermic and mechanism of the reaction process were studied by combining experiments with theoretical calculation. Method The exothermic characteristic for the synthesis of tert-butyl hydrogen peroxide was investigated by reaction calorimeter. The thermal decomposition characteristics of reactants and products in the reaction system were analyzed by differential scanning calorimeter (DSC) and adiabatic calorimeter (Phi-TEC Ⅱ). The reaction mechanism was analyzed by combining the results of reaction calorimeter, gas chromatography (GC) and the density functional theory method (DFT). Finally, the risk level of the reaction process was evaluated by the risk matric and the Stoessel critical diagram. Significant Findings TBHP is the main product of the oxidation process and its mass production corresponds to the main exothermic stage of this process. The second step reaction product is thermally unstable and hydrogen peroxide is a hidden danger in the oxidation reaction system. The thermal hazard of the two-step synthesis reaction was unacceptable. Thus, the operation conditions of the reaction need to redesign for reducing hazards. The results can provide reference for further improving the intrinsic safety design of the process.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Chengyu Nie,Wei Luan,Xianfu Chen,Linyan Li,Ke Wei,Minghui Qiu,Yiqun Fan
Sebacic acid , an important chemical intermediate, is usually prepared by fermentation. However, the composition of the fermentation broth is complex, which causes significant difficulties in the purification of the product and is still a key problem in the industry. In this study, the application of ceramic membranes for the separation and purification of simulated fermentation broth was studied. Ceramic microfiltration (MF) and ultrafiltration (UF) membranes with average pore sizes of 100 and 6 nm, respectively, were systematically compared by analyzing their separation effects on different components in the fermentation broth and their permeation flux during filtration. Both ceramic MF and UF membranes can be used to clarify the fermentation broth with turbidity less than 0.01 NTU by the effective removal of emulsified oil and bacteria while allowing sodium sebacate to pass through freely. However, the ceramic UF membrane showed a higher protein rejection of more than 95%, whereas the removal rate of the MF membrane was only approximately 20%. In addition, the fouling process of ceramic UF membrane was analyzed. In the suitable operating conditions when the pH was 9.2, the temperature was 60 ℃, the pressure was 0.1 MPa and the cross-flow velocity was 1.8 m·s −1 , the membrane fouling process was dominated by the reversible cake formation. A ceramic UF membrane with a smaller pore size can effectively avoid pollution in pore channels, and thus exhibits a higher permeation flux in the filtration of the fermentation broth.
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2023
·Vol. 11
·期 4
·1137
·
IF 3.5
Junliang Wang,Zhenzhen Zhang,Quanyuan Wang,Tianhong Lou,Zhiyan Pan,Mian Hu
Understanding the solubility of CO2is critical for implementing CO2-enhanced oil recovery (CO2-EOR). In this work, the solubility of CO2inn-decane in a temperature range between 303.15 K and 353.15 K and pressures up to 15 MPa was measured using a fused silica capillary cell with in situ Raman spectroscopy. A semi-empirical CO2solubility prediction model was obtained according to the experimental results. In order to improve the solubility of CO2inn-decane, the solubility of CO2inn-decane and co-solventn-hexane (3% wt) mixture was also comparatively investigated. The results indicated that the solubility of CO2inn-decane was 1.6355~64.0084 mol/kg. The data from the prediction model were in good agreement with the experimental data, and the mean relative deviation was 3.65%, indicating that the prediction model could be used to predict the solubility of CO2inn-decane under different conditions. The solubility of CO2inn-decane +n-hexane system ranged from 1.0127 mol/kg to 65.7286 mol/kg. It was found that, under low-pressure conditions, the addition of co-solventn-hexane did not enhance the solubility of CO2, while it had a certain enhancement effect on the dissolution of CO2under high-pressure conditions. As the temperature increased from 303.15 K to 353.15 K, the enhancement efficiency of the solubility of CO2also increased from 1.34~2.05% to 8.17~9.82%, and the average enhancement efficiency increased from 1.74% to 9.00%. This study provides more CO2solubility data for CO2-EOR.Keywords:CO2solubility;n-decane;n-decane +n-hexane;Raman spectroscopy
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Hao Xu,Hao Li
Constructing heterogeneous catalysts with high efficiency and stability to achieve biomass HDO under comparatively mild conditions is an arduous challenge. Crystal phase of metal oxides supports could affect the geometric and electronic properties, causing the variation of catalytic performance. Herein, a series of Pd/Nb 2 O 5 catalysts of pseudohexagonal crystal phase (Nb 2 O 5 -TT), orthorhombic phase (Nb 2 O 5 -T) and monoclinic phase (Nb 2 O 5 -H) are prepared through regulating the annealing temperature. Impressively, Pd/Nb 2 O 5 -T catalyst showed amazing catalytic performance of 100% conversion and 98.9% selectivity of 2-methoxy-4-methylphenol (MMP) at room temperature (25℃) within 30 min, superior than Pd/Nb 2 O 5 -TT, Pd/Nb 2 O 5 -H and other Pd-based catalysts that had been reported. Besides, the Pd/Nb 2 O 5 -T perform robust stability and maintain its high activity after ten times recovery experiment. This catalytic system is also suitable for different kinds of aldehydes compounds at room temperature, exhibiting the high activity and selectivity towards deoxygenated products. Based on the characterizations and experimental validations, it has confirmed that the strong metal-support interaction (SMSI) effect generates via electron transfer between Pd species and Nb 2 O 5 -T support, where in situ reduction of PdO occurred during the reaction, generating active interfacial Pd-O-Nb sites and accelerating the breaking of C-O bonds. The insights of this work provide a guiding direction for the future design of highly selective heterogeneous catalysts by crystal phase modulation engineering.
✓ 已验证
产品关联
DOI
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2023
·Vol. 60
·期 4
·368-375
·
IF 1
Yarou Yang,Xu Li,Jinxiang Dong
Benzene and 1-dodecene are often alkylated to produce linear alkylbenzene (LAB). LAB is the raw material for the production of linear alkylbenzene sulfonate (LAS), a very important anionic surfactant used in both industrial cleaning and commercial laundry processes, as well as in household laundry detergents. In the present study, we investigated the use of [Et 3 NH]Cl–2AlCl 3 modified with CuCl 2 as a catalyst for the alkylation of benzene with 1-dodecene, specifically looking at the effect of reaction conditions on product activity. The results showed that a conversion of 1-dodecene of 100.0 % and a selectivity of LAB of 93.79 % could be obtained when the following ideal reaction conditions were present: molar ratio of benzene/1-dodecene = 6, reaction temperature = 25 °C, reaction time = 10 min, stirring speed of 1000 rpm and addition of 5.0 mol % CuCl 2 ). The catalyst concentration was 7.0 mol %. FTIR and 31 P-TMPO-NMR measurements were performed to characterise the ionic liquid before and after the addition of CuCl 2 . After the addition of CuCl 2 , it was found that the acidity of the ionic liquid had decreased. The regeneration of the catalyst was also investigated and the cause of inactivation of the catalyst was determined. The results showed that CuCl 2 modified the ionic liquids and decreased the benzene/1-dodecene ratio, but the high product selectivity was maintained.
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Yan Cheng,Shanchi Wang,Zhiguang Xu,Lianyi Jiang,Yan Zhao
Oil-repellency of fabric is essentially based on perfluoroalkyl substances (PFAS, or called perfluorochemicals (PFCs)). However, plans to phase out the use of these chemicals, even those short-chain ones (C4-C6), have been announced because they accumulate in the human body and are extremely persistent in the environment. It is urgent to develop non-fluorine surface chemistry for oil-repellent fabric finishing. Here, we report the non-fluorine oil repellency of brush-like polydimethylsiloxane (PDMS) coating (g-PDMS), and the comparison of its oil repellency with that of a common PFAS crosslink polysiloxane coating (C 4 -PFAS). A catalyst-free, solvent-free chemical vapor deposition (CVD) process was used to prepare the g-PDMS coating. For smooth glass, g-PDMS coating exhibits ultralow contact angle hysteresis (∆ θ ) for various oils (1.3–7.3°), while the ∆ θ of C 4 -PFAS coating is much higher (30.7–49.7°). For fabrics, g-PDMS and C 4 -PFAS achieved almost the same contact angles to castor oil (~134°). According to GB/T 19977-2014 standard, the oil repellency of coated fabrics was rated Grade 5 for both g-PDMS and C 4 -PFAS. Therefore, the non-fluorine oil repellency of g-PDMS is able to meet the basic requirement of oil-repellent fabric finishing, and it is expected that the oil repellency can be further improved by the rational design on surface topography .
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Qian Xu,Xiujun Wang,Weixin Hu,Jian Zhang,Ming Duan,Shenwen Fang
Cationic polyamide-amine dendrimer can promote the clarification performance of nonionic block polyether water clarifier for treating produced water from heavy oil field, but the reason is lack of study. In this paper, a cationic polyamide-amine dendrimer TA which can effectively improve the oil removal speed of nonionic polyether DMEA-PE and reduce the onset temperature of DMEA-PE clarification performance was prepared, and the reason was explored from both thermodynamic and dynamic aspects by studying the effect of TA on the hydrophilic-lipophilic deviation (HLD) equation and oil-water interface behavior of DMEA-PE. The research results showed that TA moved up the HLD vs T curve of DMEA-PE and decreased its temperature corresponding HLD = 0, which was a favor of decrease in onset temperature of DMEA-PE clarification performance. TA had no effect on the DMEA-PE's capacity of oil-water interface adsorption and decreasing oil-water interface film strength. However, TA can reduce the electronegativity of oil droplet in water and enhance the oil droplets coalescence, hence the oil removal speed and efficiency of DMEA-PE were enhanced. This is the first time that HLD concept was used to investigate the action mechanism of composite water clarifier and the results are useful for the water clarifier design.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Ziyu Jia,Jun Hu,Ping Lu,Yahui Sun,Yunjun Wang
Herein, using Ru/C and H 2 WO 4 as the catalysts, native lignin in biomass was efficiently depolymerized into monophenols following the lignin-first strategy at mild conditions. Upon the co-presence of Ru/C and H 2 WO 4 , birch lignin afforded monophenols in 40.4 wt% yield at 200 °C, which was 2.5 times that upon Ru/C and 7.5 times that upon H 2 WO 4 . 4-Propylsyringol and 4-propylguaiacol were two major products with a combined selectivity of 73%. 2D HSQC NMR of liquid product reveals that β-O-4 bonds in the soluble lignin fragments had been thoroughly disrupted. H 2 WO 4 dissolving at high temperatures promoted the solvolysis of lignin from the biomass matrix, and Ru/C enhanced the following reductive depolymerization. The solid catalysts can be readily recovered for reuse at room temperature after the hydrolysis of carbohydrates, and the catalysts exhibited high activity after four recycles.
✓ 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）