Environmental Progress & Sustainable Energy
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2022
·Vol. 42
·期 4
·e14073
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IF 2.824
Guo Xiurong,Wang Yinghui,Zhang Haonan,Danfeng Du,Qi Zhanfeng
Biomorphic porous La 0.8 Ce 0.2 Fe 0.3 Co 0.7 O 3 perovskite-type catalysts are synthesized through a facile bio-templating method taking wood fiber as template for achieving the four-way purification of PM, NO x , CO, and HC emitted by automobile exhausts. The catalyst samples were characterized by X-ray diffractometer, Fourier-transform infrared spectroscopy, scanning electron microscope and Brunauer–Emmett–Teller analysis. The results showed that catalyst sample calcined at 700°C obtained high purity, high surface area (4.01 m 2 /g), wide pore size distribution and retained the initial wood fiber structure, which was suitable for purifying automobile exhausts. In addition, the performances for four-way purification under the simulated exhaust were analyzed by simulation test bench. The highest purification efficiency of PM, NO x , HC, and CO can reach 92%, 92%, 98%, and 76%, separately. Moreover, four-way purification mechanism was deduced according to the theoretical research of Mars-van krevelen on the redox reaction mechanism and experimental result.
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Wood Material Science & Engineering
·
2023
·
IF 2.2
Weihua Zou,Zimu Li,Zhangheng Wang,Delin Sun
A blue thermochromic dye (B-TD) was prepared by mixing crystal violet lactone (CVL), hydroxyethyl acrylate (HEA) and myristic acid myristyl ester (MME). B-TD is a phase-changing material and can change colour at above 32°C about 5 s. The B-TD can permeate into pre-treated pinewood samples about 8–10 mm from the surface of samples after immersed pre-treated pinewood samples in B-TD for about 10 min at 70 °C. A blue thermochromic pinewood (B-TP) was prepared by filled the B-TD into pre-treated pinewood and covered polypropylene wax that can prevent B-TD overflowing from wood-based material when at phase-changing temperature. The B-TP can change colour from dark blue to light blue at 38–48°C, and can recover dark blue at below 38°C after about 5 h. B-TP can be used in a kind of pinewood woodwork that can indicate the temperature of woodwork surface to users by its colour-change phenomenon at 38–48°C, covering the lowest temperature of cryogenic burns (42°C), so this kind of pinewood woodwork can warn the temperature of cryogenic burns for avoiding cryogenic burns by its colour-change phenomenon.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Yao Li,Lan-hua Liu,Xiao-qin Yu,Yu-xin Zhang,Jing-wen Yang,Xue-qin Hu,Hong-bin Zhang
Bioglycosylation is an efficient strategy to improve the biological activity and physicochemical properties of natural compounds for therapeutic drug development. In this study, two caffeic acid phenethyl ester (CAPE) glucosides (G-CAPE and 2G-CAPE) were synthesized by transglycosylation with dextransucrase from Leuconostoc mesenteroides 0326 with CAPE as an acceptor and sucrose as a donor. The products were purified and the structures were characterized. The physicochemical properties, anti-inflammatory activity, and cytotoxicity of the two CAPE glucosides were measured. The water solubility of G-CAPE and 2G-CAPE is 35 and 90 times higher, respectively, than that of CAPE. Compared to CAPE, the monoglycoside product showed superior anti-inflammatory effects, and its inhibition rate of NO, IF-6, and TNF-α is 93.4%, 76.81%, and 56.58% in RAW 264.7 macrophages, respectively, at 20 μM. Also, the cytotoxicity of both products was significantly improved. These glycosylation-modified CAPEs circumvent some of the flaws in CAPE application in anti-inflammatory drugs.
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RSC Advances
·
2019
·Vol. 9
·期 14
·7833-7841
·
IF 3.049
Lukai Wang,Junzong Feng,Yonggang Jiang,Liangjun Li,Jian Feng
The traditional SiO2 aerogels are difficult to apply in the fields of energy storage and heat insulation due to their poor mechanical properties. In order to deal with this issue, the polyvinylpolymethylsiloxane aerogel (PVPMSA) materials with fine mechanical flexibility and excellent thermal insulation properties are suitable substitutions. In this paper, the double cross-linking organic–inorganic hybrid PVPMSAs were prepared through the processes of free radical polymerization and hydrolytic polycondensation. The internal silica network reinforced with aliphatic hydrocarbons has significantly improved the mechanical properties and acquired a high specific surface area, reaching up to 1218 m2 g−1. Furthermore, the thermal conductivity of monolithic PVPMSAs has been investigated by changing the density and environmental conditions. Results show that PVPMSAs at 25 °C in 5 Pa have a thermal conductivity as low as 14.69 mW m−1 K−1, and the solid thermal conductivity shows a flat growth with the increase of density. Meanwhile, the nanosize pores could significantly inhibit the heat transfer of gas. As for the radiative thermal conductivity, it is greatly affected by temperature. All these results obtained from this paper would help us to design thermal insulators reasonably.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Kai Huang,Lin Lin Guo,Dong Fang Wu
A series of effective heterogeneous catalysts, Cu or Ni salen with various loadings encapsulated in amino functionalized MOFs, were synthesized successfully for the first time via a one-pot method and denoted as metal salen@NH2-MIL-101(Cr). On the basis of detailed characterization of the catalysts, the varying coordination abilities between the Cu or Ni salen and NH2-MIL-101(Cr) provided the as-prepared Cu or Ni salen@NH2-MIL-101(Cr) with distinct activities toward styrene oxidation. The catalytic results showed that the introduction of Cu or Ni salen can significantly promote the selectivity to epoxide. However, Cu salen@NH2-MIL-101(Cr) showed preferable activity for styrene oxidation, and phenylacetaldehyde was generated with increasing Cu salen content. The optimal conditions for the reaction were also discussed, including the types of oxidants present, molar ratios of styrene and TBHP, and temperature. In particular, the mechanism of the styrene oxidation in 70% TBHP over Cu salen@NH2-MIL-101(Cr) was proposed in this work.
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NANOTECHNOLOGY
·
2018
·Vol. 30
·期 3
·035601
·
IF 3.404
Hongshuai Wu,Chaoqun You,Jia Jiao,Fanghui Chen,Baiwang Sun,Xiaoli Zhu
A combination of photothermal-chemotherapy has received widespread attention in drug delivery systems for cancer treatment. However, the combination therapy operated in subcellular organelles, such as mitochondria, has been rarely reported. Herein, we designed a novel near-infrared (NIR) triggered dual-targeted nanoplatform (FA/TPP-DINPs) based on mitochondrial combined photothermal-chemotherapy by co-loading FDA-approved NIR dye indocyanine green (ICG) and anticancer drug doxorubicin (DOX). The resulting nanoparticles showed a monodispersed sphere and excellent colloidal stability. Specially, the simultaneous introduction of targeted ligands folic acid (FA) and triphenylphosphine (TPP) to nanoparticles significantly promoted the cellular internalization and mitochondrial co-localization of nanoparticles. Moreover, the encapsulated dye could convert NIR light into heat with high efficiency, which makes the FA/TPP-DINPs an effective platform for mitochondrial combination therapy with chemotherapy drug DOX. Meanwhile, the thermal expansion in response to the change of temperature after sustained 808 nm laser irradiation could cause the disintegration of nanoparticles, which triggered the rapid release of DOX from nanoparticles. As expected, the prepared FA/TPP-DINPs exhibited evidently enhanced cytotoxicity and preeminent combination therapy efficiency on MCF-7 cells. Thus, the NIR triggered dual-targeted nanoplatform provides a new drug delivery strategy for mitochondrial combined photothermal-chemotherapy of cancer.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Feiran Li,Bharat Bhushan,Yunlu Pan,Xuezeng Zhao
Oil contamination is pressing environmental and natural resource issues. Oil-water separation technology can be used for water purification . Traditional methods are either time consuming or energy intensive. Bioinspired materials with combination of affinity and/or repellence towards oil and water in mesh-based methods have attracted widespread attention in the oil-water separation. Among existing materials, superhydrophobic/superoleophilic materials are prone to contamination by oil. Superhydrophilic/underwater superoleophobic materials can only operate underwater which restricts the practical use. In contrast, superoleophobic/superhydrophilic materials are desirable for oil-water separation. However, traditional mesh-based method cannot be used for separation of emulsions since the dispersed microdroplets can easily pass through the mesh pores. Superhydrophobic/superoleophilic cotton has been used for separation of water-in-oil emulsions. In this study, a facile method to fabricate bioinspired superoleophobic/superhydrophilic cotton was developed. The functionalized cotton exhibits an oil-repellent and water-wetting behavior and is capable of separating both immiscible oil-water mixtures and also oil-in-water emulsions without oil contamination. This developed cotton is of interest for various applications.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Jiajiang Lin,Mengqiang Sun,Binglin Su,Gary Owens,Zuliang Chen
While phytogenic nanomaterials have been successfully used to remove heavy metals in wastewater, the potential to successfully use such materials to immobilize heavy metals in soils is still unclear. In this study, phytogenic iron oxide nanoparticles (PION) were used to immobilize cadmium (Cd) in six soils. Amendment with PION effectively immobilized Cd, with a concomitant increase in the concentrations of iron oxides, soil pH and dissolved organic carbon (DOC) under both oxic and anoxic conditions . However, observed changes in soil properties and Cd fractions were different under oxic and anoxic conditions. After PION application, the exchangeable Cd fraction decreased by up to 91 and 69%, while the carbonate bound Cd fraction decreased by up to 61 and 75%, under oxic and anoxic conditions, respectively. Pearson correlation analysis revealed that under both oxic and anoxic conditions, Cd fractions were significantly and positively correlated with free iron oxide content and pH, where free iron oxide content was positively correlated with amorphous iron oxide, DOC and pH. The Cd immobilization mechanisms potentially involved either (1) formation of insoluble hydroxides at elevated pH; (2) participation of biomolecules released from PION in ligand complexation with Cd and (3) co-precipitated of Cd during the formation of iron oxides. This study provided new insights into the potential effects of PION applications for practical Cd immobilization in contaminated soils.
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BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2019
·
IF 2.705
Qing Shan,Xiaoyu Li,Mei Zheng,Xi Lin,Guotao Lu,Dongming Su,Xiang Lu
Doxorubicin (DOX) is an antitumor drug widely used in hematological tumors and various solid tumors. However, the cardiotoxicity elicited by DOX severely limits its clinical treatment. Dimethyl itaconate (DI), a common form of itaconate, is found many potential targets for prevent heart injury. Here we employed wild type and Nrf2 knockout mice and induced a cardiotoxicity model by administration of DOX to clarify the effects of DI. After treatment with DI, we found that it could effectively alleviate the cardiotoxicity by analyzing morphology, LDH levels and heart weight/body weight ratio changes. Meanwhile we demonstrated that RIP3, a key protein of necrosis, was significantly decreased in DI treated group. Further we observed that treatment with DI could suppress oxidative stress by altering Nrf2/HO-1. Compared with vehicle group, DI could increase the tissue SOD and GSH, and reduce MDA levels, then DHE staining revealed that the level of ROS in DI group reduced by half. Finally, transmission electron microscope (TEM) data showed that treatment with DI obviously decreased the mitochondrial damage. While Nrf2 was ablated in mice, the protective effects of DI were vanished and SOD, GSH, MDA became unchanged related to vehicle group. This report provides the evidence for the protective effects of DI treatment in cardiotoxicity induced by DOX. On mechanisms, DI could reduce the oxidative stress by altering Nrf2/HO-1 pathway and prevent mitochondrial from damage. Taken together, these findings of this paper will afford the new therapeutic targets in DOX related cardiotoxicity.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 319
·期 3
·869-880
·
IF 1.181
Ding Hanlin,Luo Xuegang,Zhang Xiaonuo,Yang Hao
In this work, a modified biomass material was successfully prepared by immobilization and inactivation method based on Aspergillus niger , and the obtained environmentally friendly Alginate-immobilized Aspergillus niger microsphere (AAM) exhibited a superior Th(IV) biosorption performance. The sorption kinetics and thermodynamic analysis were studied and showed that the sorption process is spontaneous and endothermic under the experimental conditions. Additionally, the maximum biosorption capacity of AAMs for Th(IV) can be of 303.95 mg g −1 at 313.15 K, which exhibited a superior biosorption capacity than the most reported other biomass materials. The results illustrated the biomaterial had good recyclability through immobilization and inactivation.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Cheng Liu,Lei Jin,Fang-Zu Yang,Zhong-Qun Tian
A series of ferrochrome alloy layers with different iron contents are electrodeposited. The phase transformation sequences of the electrodeposited Cr-29.51 wt% Fe alloy layer upon heat treatment are studied in detail. X-ray diffraction analysis shows that as the iron content of the layer increases, the ferrochrome alloy layer changes from a crystalline structure of a substitutional solid solution, then to a mixed-structure of amorphous and crystalline, and finally to an amorphous structure. The differential scanning calorimetry curves at heating rates ranging from 5 °C/min to 20 °C/min, accompanied with the heat treatment, indicate that the layer starts the first crystallization at around 692.45–722.15 K and then precipitates new phases of Cr 2 O 3 and Cr 23 C 6 at around 870.35–895.95 K. Their apparent activation energies are 172.1 ( E a1 ) for the crystallization and 341.6 kJ/mol ( E a2 ) for the new phase precipitation, respectively. After the heat treatment, the iron content on the surface of the layer is significantly reduced while the O strongly increased.
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ChemPlusChem
·
2018
·Vol. 83
·期 12
·1119-1126
·
IF 3.205
Yunfang Gao,Huojun Wan,Yunchuan Xia,Xin Xu,BaoLiang Wu
Graphical Pores for effect : A hierarchically porous lead-modified phenolic resin-based carbon (Pb/PRC) material was synthesized from lead-modified phenolic resin (Pb/PR), which in turn was prepared by chelation of a phenolic resin (PR) by lead ions in solution. Toluene and KOH served as the pore-forming agent and the activating agent, respectively. The hierarchically porous Pb/PRC was applied in a lead-carbon battery. A novel and scalable lead-modified phenolic resin-based carbon material (Pb/PRC) has been successfully prepared by using lead-modified phenolic resin (Pb/PR) as a precursor, toluene as a pore-forming agent, and KOH as an activating agent. The Pb/PRC composite presents a hierarchically porous nanosphere structure, and this structure contributes to prolong its cycling life under high-rate partial state-of-charge (HRPSoC) operation. Pb/PRC with nano-lead can effectively inhibit hydrogen evolution and provide pseudocapacitance. Compared with a blank negative plate, a lead-carbon battery with Pb/PRC displays 18 000 cycles under HRPSoC operation and exhibits a capacity of 100 mA h g −1 at 2 C discharge rate.
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