FUEL PROCESSING TECHNOLOGY
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2017
·
IF 3.752
Xiang-Xue Liu,Zhi-Min Zong,Wei-Tu Li,Xiang Li,Zhan-Ku Li,Sheng-Kang Wang,Xian-Yong Wei
A novel and highly active magnetic solid superbase (MSSB) with extraordinary recovery and recycling properties was prepared by impregnating Mg 2 Si onto mesoporous silica coated magnetite via one-pot preparation and successfully applied in the catalytic hydroconversion (CHC) of sawdust at 220 °C. Detailed molecular compositions of the soluble portions from non-catalytic hydroconversion (SP NCHC ) and CHC (SP CHC ) were characterized with a Fourier transform infrared spectrometer and gas chromatograph/mass spectrometer (GC/MS). As a result, the yield of SP CHC is significantly higher than that of SP NCHC and most of the GC/MS-detectable compounds in SP CHC are guaiacols , while SP NCHC is rich in guaiacols and esters, indicating that MSSB effectively catalyzed the cleavage of C O bridged bonds in sawdust. The mechanism for catalytically hydrocracking C O bridged bonds over MSSB is proposed using benzyloxybenzene and oxybis(methylene)dibenzene as model compounds. MSSB can be easily separated by using an external magnetic field and the recovered MSSB proved to be still highly active for catalyzing the hydrocracking of C O bridged bonds in sawdust.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2016
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IF 5.557
Dong Zou,Minghui Qiu,Xianfu Chen,Yiqun Fan
Compared to the traditional separation technology, membrane separation is particular beneficial for the treatment of contaminated fresh water such as agricultural runoff, and hydraulic fracturing wastewater. However, the development of cost-effective membranes with both high permeability and high rejection performance is still a challenge. In this study, we design one-step preparation of high-performance bi-layer α-alumina ultrafiltration (UF) membranes supported on coarse tubular substrates via co-sintering process. In this approach, boehmite sol and alumina nanoparticles were mixed in different ratios for the fabrication of microfiltration (MF) layer and UF layer, respectively. The effects of dip-coating dispersion formulation, coating time and thermal treatment process on the membrane microstructure and performance were comprehensively investigated. It was found that the presence of boehmite sol in the MF layer could accelerate its sintering process, while the addition of alumina nanoparticles into UF layer could promote the phase transition from γ phase to α phase at low temperature and retard the shrinkage. The optimized doping content of boehmite and alumina nanoparticles were 2 wt% and 4 wt% to achieve a good match of thermal expansion properties between the two co-sintering layers. For MF layer and UF layer, the membrane thickness were controlled to be 40–50 µm and about 1 µm, respectively. After co-sintering at 1000 °C for 2 h with a heating rate and cooling rate of 0.5 °C/min, tubular α-alumina UF membranes were found to display a high pure water permeability of 70 L m -2 h -1 bar -1 and a small pore size of ~5 nm, which also exhibited good dye removal capabilities in the process of treating dye waste water.
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ACS Applied Materials & Interfaces
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2016
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IF 7.145
Rong Bai,Qing Zhang,Lanlan Li,Ping Li,Yan-Jie Wang,Oudjaniyobi Simalou,Yanling Zhang,Ge Gao,Alideertu Dong
N-Halamine-based antibacterial materials play a significant role in controlling microbial contamination, but their practical applications are limited because of their complicated synthetic process and indistinct antibacterial actions. In this study, novel antibacterial N-halamine-containing polymer fibers were synthesized via an one-step electrospinning of N-halamine-containing polymers without any additives. By adjusting the concentration of precursor and the molecular weight of polymers, the morphology and size of the as-spun N-halamine-containing fibers can be regulated. The as-spun fibers showed antibacterial activity against both Gram-positive and Gram-negative bacteria. After an antibacterial assessment using different biochemical techniques, a combined mechanism of contact/release co-determined killing action was evidenced for the as-spun N-halamine-containing fibers. With the aid of contact action and/or release action, this combined mechanism can allow N-halamines to attack bacteria, making the as-spun fibers wide in the application of antibacterial fields, whatever it is in dry or wet environment. Also, a recycle antibacterial test demonstrated that the as-spun fibers can still offer antibacterial property after five recycle experiments.
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PubMed
高影响因子
WASTE MANAGEMENT
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2017
·
IF 4.03
Yunpu Wang,Leilei Dai,Liangliang Fan,Leipeng Cao,Yue Zhou,Yunfeng Zhao,Yuhuan Liu,Roger Ruan
In this study, a ZrO 2 -based polycrystalline ceramic foam catalyst was prepared and used in catalytic co-pyrolysis of waste vegetable oil and high density polyethylene (HDPE) for hydrocarbon fuel production. The effects of pyrolysis temperature, catalyst dosage, and HDPE to waste vegetable oil ratio on the product distribution and hydrocarbon fuel composition were examined. Experimental results indicate that the maximum hydrocarbon fuel yield of 63.1 wt. % was obtained at 430 °C, and the oxygenates were rarely detected in the hydrocarbon fuel. The hydrocarbon fuel yield increased when the catalyst was used. At the catalyst dosage of 15 wt.%, the proportion of alkanes in the hydrocarbon fuel reached 97.85 wt.%, which greatly simplified the fuel composition and improved the fuel quality. With the augment of HDPE to waste vegetable oil ratio, the hydrocarbon fuel yield monotonously increased. At the HDPE to waste vegetable oil ratio of 1:1, the maximum proportion (97.85 wt.%) of alkanes was obtained. Moreover, the properties of hydrocarbon fuel were superior to biodiesel and 0 # diesel due to higher calorific value, better low-temperature low fluidity, and lower density and viscosity.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2017
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IF 2.986
Li Fang,Leixin Hou,Yuhao Zhang,Yongkang Wang,Guanghong Yan
Highly hydrophobic rutile titania-silica nanocomposites were synthesized by an improved hydrolysis co-precipitation method using low-cost sodium metasilicate and titanium oxysulfate (TiOSO 4 ) as precursors, followed sequentially by calcination at 800 °C and modification with trimethylchlorosilane (TMCS). It was found that the resulting TiO 2 -SiO 2 nanocomposites had a Ti/Si molar ratio of 5:1 and exhibited single-phase rutile with a specific surface area of 269 m 2 g −1 . The addition of acetylacetone (AcAc) during the hydrolysis co-precipitation process played a key role in the growth of well-ordered TiO 2 -SiO 2 crystallites since the hydrolysis rate of TiOSO 4 might be retarded due to the complexation of AcAc to the Ti atoms in TiOSO 4 . The TMCS-modified TiO 2 -SiO 2 nanocomposites exhibited a high root-mean-square (RMS) roughness of 22 nm and good hydrophobicity with a static contact angle of 143.7°, highlighting its potential application as a filler in exterior wall coatings.
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高影响因子
POLYMER SCIENCE SERIES B
·
2017
·Vol. 59
·期 5
·630-638
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IF 0.621
Sun Shuai,Wang Yu,Wang Lipeng,Bai Yongping,Ding Liping
In this paper, poly(ethylene terephthalate- co -isophthalate) was prepared and a series of PETI/SiO 2 nanocomposites with different amounts of silica nanoparticles was synthesized by in situ polymerization. Optical properties of the resultant nanocomposites were investigated by WGW photoelectric haze meter and UV–Vis-NIR spectrophotometer. Chemical structure and its influence on spherulite size of nano-SiO 2 were characterized by Fourier transformed infrared spectra and polarized optical microscopy, respectively. The differential scanning calorimetry results reveal that the addition of nano-SiO 2 has an impact on the thermal performance of the nanocomposite. Different proportions of SiO 2 were compared and the degree of crystallinity was found to have influence on optical properties of as-prepared nanocomposites. In addition, the results indicate that the low loading levels of SiO 2 can improve the optical properties of the composite and an optimum content was selected. Possible reasons for this enhanced role might be the different combination structure of the nanocomposites when the amount of SiO 2 varied.
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高影响因子
CARBOHYDRATE POLYMERS
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2016
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IF 4.219
Dong-Yan Wu,Yu Ma,Xiao-Shuang Hou,Wen-Jie Zhang,Pei Wang,Huan Chen,Bo Li,Can Zhang,Ya Ding
Although combination delivery (co-delivery) shows much superiority in the defect compensation of single-agent therapy, the construction and application of co-delivery systems are still challenging, especially for protein-based joint systems. In this work, a series of chitosan (CS)-amino acid derivatives (Arg-CS, Lys-CS, and Phe-CS) with different degrees of substitution (DS) were synthesized to prepare CS nanocapsules (CNCs) using a simple emulsification method in the presence of linoleic acid (LA). The hydrophobic drug can be loaded in LA droplets, and a positively charged protein stabilized the optimized Arg-CS nanocapsules (Arg-CNCs) on their negative surfaces. The in vitro antitumor efficacy of Arg-CNCs co-delivering paclitaxel and recombinant human caspase-3 was evaluated in HeLa cells. The co-delivery system displayed much lower IC 50 values and a higher percentage of apoptotic cells compared with the control groups. This system provides a promising and universal strategy for co-delivery, leading to collaborative tumor treatment.
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PubMed
高影响因子
Toxics
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2024
·Vol. 12
·期 10
·702
·
IF 3.9
Moyong Xue,Ming Jia,Yuchang Qin,Jing Li,Ting Yao,Frédéric Francis,Xu Gu
Knowledge regarding the combined toxicity mechanism of bisphenol compounds and microplastics (MPs) on organisms remains limited. In this study, we first developed an accurate and sensitive method to simultaneously quantify two bisphenol compounds and evaluate their accumulation and tissue distribution after co-exposure with MPs in zebrafish. Then, we determined the bioaccumulation potential of bisphenol A (BPA) and bisphenol S (BPS) in adult zebrafish in the absence and presence of MPs. Bisphenol compounds were found to accumulate in different tissues of zebrafish, with BPS showing lower accumulation levels compared to BPA. Importantly, we discovered that the presence of MPs could exacerbate the accumulation of bisphenol compounds in biological tissues. These findings highlight the enhanced bioavailability and risk posed by the co-exposure of bisphenol compounds and MPs, underscoring the need for further investigation into their combined environmental and biological health impacts.
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PubMed
高影响因子
Energy Advances
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2024
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IF 3.2
Kunpeng Liu,Xu Wang,Nan Wang,Ruiyong Zhang,Meinan Yang,Baorong Hou,Wolfgang Sand
Rationally designing high-efficiency catalysts for electrochemical two-electron water oxidation reaction (2e− WOR) to produce hydrogen peroxide (H2O2) is extremely important, while designing bimetallic metal–organic frameworks (MOFs) is of great significance for effective 2e− WOR. Herein, MIL-53(Fe) and different proportions of Co-doped MIL-53(Fe) were prepared by a hydrothermal method. The structural characterization and elemental analysis showed that the Co ions were successfully doped into MIL-53(Fe) to form a MIL-53(Fe/Co) bimetallic MOF, and the morphology of MIL-53(Fe/Co) became more regular after Co doping. We found that the optimized MIL-53(Fe/Co) exhibits remarkable 2e− WOR performance, which gave an overpotential of 150 mV at 1 mA cm−2. The overpotential of MIL-53(Fe/Co) was approximately 220 mV (at 1 mA cm−2) lower than that of MIL-53(Fe), which may be attributed to the change of microstructure of MIL-53(Fe) after Co doping and the synergistic effect between Fe/Co. Our work introduces a strategy for designing bimetallic MOF-based electrocatalysts, opening up new possibilities for efficient 2e− WOR systems.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Zhao-Xing Yan,Ling-Xi Zhao,Ning Liu,Na Li,Ru-Song Zhao
Non-steroidal anti-inflammatory drugs (NSAIDs) have gained significant attention as emerging pollutants and are increasingly detected in aquatic environments. Therefore, it is imperative to investigate the efficient removal of NSAIDs from water systems. In this study, a magnetic LDH with three-dimensional hollow structure (Fe 3 O 4 @ZIF-67@Co-Ni LDH) was synthesized using ZIF-67 as a template for the removal of carprofen (CPF) and flurbiprofen (FLU) from water environments. The adsorption process of CPF and FLU on Fe 3 O 4 @ZIF-67@Co-Ni LDH and the competitive adsorption between these two NSAIDs were investigated. The adsorption mechanism was explored by experimental analysis and theoretical calculation. Results demonstrated that the pseudo-second-order kinetic model and Liu isotherm model can better fit the kinetic and isotherm data, and according to the thermodynamic data analysis, the adsorption process was exothermic, spontaneous and stable. The adsorption capacity of CPF and FLU on Fe 3 O 4 @ZIF-67@Co-Ni LDH can reach 856.2 mg/g and 797.5 mg/g. Fe 3 O 4 @ZIF-67@Co-Ni LDH exhibited high adsorption capacity for CPF and FLU in actual environment water, with stronger affinity towards CPF when both NSAIDs coexisted simultaneously. The three-dimensional hollow structure enhanced the adsorption capacity of Fe 3 O 4 @ZIF-67@Co-Ni LDH, making it a promising adsorbent for NSAIDs.
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JOURNAL OF ETHNOPHARMACOLOGY
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2025
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IF 5.4
Shasha Han,Zichen Luo,Shihang Bao,Zihan Xiao,Weichen Xu,Tong Xie,Chen Shi,Jin Wang,Jinjun Shan
Ethnopharmacological relevance Platycodon grandiflorus root, is a widely used herb in East Asia for treating respiratory diseases, but research on its oral safety is limited. Aim of the study This study examines the potential adverse gastrointestinal reactions resulting from excessive consumption of Platycodon grandiflorus root (PR) and its effects on gut microbiota and host co-metabolism. Materials and methods This study evaluated the effects of different doses (1.5, 4.5, and 7.5 g/kg/day) of PR on ICR mice through gavage. Select the 7.5 g/kg/day dosage group and the control group to assess intestinal morphology and conduct histopathological studies. Examine inflammation-related factors and tight junction proteins using WB, qPCR, and ELISA. Additionally, perform 16S rDNA sequencing and metabolomic analyses to evaluate changes in gut microbiota and endogenous metabolites. Finally, the clearance of gut microbiota with antibiotics, the effects of excessive PR on mice were investigated. Results Excessive intake of PR can lead to mortality in mice, as well as symptoms such as intestinal flatulence and slowed intestinal transit, suggesting the occurrence of chronic intestinal pseudo-obstruction accompanied by endotoxemia. It altered both α-diversity and β-diversity in the gut microbiota of mice, with increased relative abundances of Pseudomonadota, Verrucomicrobiota, Escherichia-Shigella , Akkermansia , Bacteroides , and Klebsiella , closely linked to intestinal obstruction and bacterial overgrowth. Excessive intake of PR also resulted in metabolic disturbances in mice, particularly in the levels of metabolites such as bate-hydroxybutyrate, 5,6-dihydrouracil, uridine, isoleucine, mannitol, bate-alanine, L-cysteine, L-tyrosine, and orotic acid, which may provide insights into the side effects associated with excessive consumption of PR. Clearing the gut microbiota significantly mitigated adverse effects on the intestines and restored metabolite levels. Conclusions This study demonstrates that excessive PR induces gut microbiota and metabolic disruption in normal mice, with the overgrowth of Gram-negative bacteria releasing LPS that impair smooth muscle contraction, leading to adverse effects such as chronic intestinal pseudo-obstruction.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Haike Li,Zhiyun Kong,Huan Zhang,Xiaolei Wang,Yaohua Xie,Xingqing Zhao,Yidan Hong
It is necessary to prepare a nanofiltration membrane with high permeation flux that can be used in the field of organic solvents. Gel membranes have a high solvent permeation flux, but their chained macromolecular structure is often unstable. In this study, tannic acid-bridged sodium alginate (TA x -Ca/FeSA) organic solvent nanofiltration (OSN) membranes were prepared by the phase transition method using aqueous Ca 2+ and Fe 3+ solutions as cross-linking agents. TA can interact with SA through hydrogen bonding hydrophobic bonding and other interactions to form an interpenetrating three-dimensional network structure. Compared with Ca/FeSA membrane, the average pore size of TA 0.125 -Ca/FeSA membrane was reduced from 1.03 nm to 0.74 nm, and the porosity was increased from 47.62 to 59.2 %. In addition, the TA 0.125 -Ca/FeSA membrane has the characteristics of a negative charge, super hydrophilicity, and high mechanical properties, exhibits a high permeation flux of 48.97 L·m −2 ·h −1 ·bar −1 with a rejection of 96.25 % for Congo red ethanol solution, has excellent solvent resistance, stain resistance, and self-cleaning ability. The TA 0.125 -Ca/FeSA membrane was demonstrated to have great potential for application in the fields of purification and solvent recovery.
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