JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 16
·7791-7803
·
IF 4.682
Ma Yanli,Wu Hailiang,Shen Yanqin
We herein report novel POSS-containing linear and star multi-arm organic–inorganic hybrid block copolymers (BCPs) L/S -(PGMA- b -PMAPOSS) 1,2,4,6 synthesized by the core-first ATRP method. Following, crosslinking of the BCPs conducted by the reaction of the glycidyl groups in the PGMA block in the presence of trimethylamine to form the 3-dimensional network and the crosslinking cured BCPs were used for the subsequent properties characterization. Based on the chemical structures being confirmed, the self-assembly behaviors in the aqueous solution and film surface property were investigated in detail. The results showed that linear L -(PGMA- b -PMAPOSS) 2 formed typical core–shell spherical micelles where the hydrophobic PMAPOSS blocks as the core and PGMA blocks as the shell. With the increasing number of arms of the hybrid BCPs, the aggregates were tuned from spherical micelles to dendritic cylinders. Besides, with the increases in the solubility of the solvent, the aggregates tended to form the spherical morphology. The hydrophobic property of the hybrid BCPs film improved gradually from linear monobrachial BCPs to star six-arm BCPs. The thermostability of the hybrid BCPs showed similar results owing to the similar MAPOSS proportion. For the adhesive performance to the glass substrate, S -(PGMA- b -PMAPOSS) 6 possessed the best adhesive strength due to the highest density of branches. Graphical abstract
The novel dual-functional linear and star POSS-containing organic-inorganic hybrid block copolymers (BCPs) L/S -(PGMA- b -PMAPOSS) 1,2,4,6 were successfully synthesized by the core-first ATRP method, then crosslinking the BCPs in the presence of trimethylamine to form the 3-dimensional network. And the self-assembly behavior in aqueous solution was studied in detail, as shown in the graphic image. In addition, the surface property, thermostability and adhesive performance were analyzed.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 16
·7909-7922
·
IF 4.682
Chai Chaofan,Yang Xuefang,Yang Xiaohua,Dong Chuan,Bian Wei,Choi Martin M. F.
Abstract The utilization of nanomaterial-based probes in detecting glutathione (GSH) and cell imaging has aroused extensive attention owing to the excellent properties of nanoprobes. Herein, we have synthesized manganese dioxide-S, O co-doped graphitic carbon nitride quantum dots (MnO 2 -S, O-CNQDs) nanocomposite by in situ synthesis of MnO 2 nanosheets in S,O-CNQDs dispersion solution. It was found that GSH could specifically bind to MnO 2 -S, O-CNQDs so that the fluorescence of S, O-CNQDs could be recovered. As such, a “turn-on” MnO 2 -S, O-CNQDs nanoprobe can be fabricated and applied to rapidly determine trace amounts of GSH. Under the optimal conditions, MnO 2 -S, O-CNQDs shows sensitive response to GSH in the range 10–270 μM with a detection limit of 0.307 μM ( S / N = 3). The developed MnO 2 -S, O-CNQDs probe has demonstrated great potential to detection of GSH in biological samples and glutathione injections. What is more, MTT assay indicates that MnO 2 -S, O-CNQDs has low biotoxicity. The non-fluorescence MnO 2 -S, O-CNQDs reacts with GSH to recover the fluorescence of S, O-CNQDs in HepG2 cells. Thus, the “turn-on” fluorescence change of MnO 2 -S, O-CNQDs offers a potentially useful tool to monitor GSH of cancer cells. Graphical Abstract
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Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Chen Dong,Chen Shanshuai,He Liang,Guan Qingqing,Miao Rongrong
Porous biochar was prepared from agricultural and forestry wastes to remove Cr(VI) in sewage, which solved the problem of water pollution and realized the reuse of wastes. Herein, in this work, the bagasse pith residues after alkali pre-extraction have been used as the raw material for preparing porous biochars ( BPR -BC), which could be further used for efficiently purifying the simulated Cr(VI) wastewater. The results showed that the as-prepared biochars had an ultra-high specific surface area of 2745.7 m 3 /g and Cr(VI) removal capacity of 185.07 mg/g. The kinetic and isotherms studies were best described by pseudo-second-order model and Langmuir adsorption isotherm model, respectively. The thermodynamic studies showed that the adsorption process was endothermic and spontaneous. Furthermore, based on the concept of “waste to waste,” the Cr-contained waste adsorbent by doping Cu has been converted into a bagasse pith residues biochar supported Copper-Chromium catalyst (Cu-CrOx/ BPR -BC) for further hydrogenation of furfural. The catalytic experimental result showed that the furfural 1 can be selectively converted into furfuryl alcohol (FOL) and difurfuryl ether (DEF) catalyzed by the prepared Cu-CrOx/ BPR -BC catalyst, provided a new idea for the further utilization of Cr(VI) containing adsorbents.
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Journal of Inorganic and Organometallic Polymers and Materials
·
2022
·Vol. 32
·期 8
·2986-2993
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IF 3.518
Hao Bei-bei,Deng Xiu-zhen,Yang Jia-ke,Jia Ying-dong,Shang Xiao-jun,Shi Yong-li,Yan Xi-qing
A novel folate-decorated and magnetic mediated drug delivery system was fabricated by combining folate and magnetic nanoparticles to the surface of silica mesoporous nanoparticles (FMMSNs) via chemical reaction. The 10-hydroxycamptothecin (10-HPCT), an analogue of camptothecin, was sealed in the mesoporous to evaluate the system’s pharmaceutics performance. The diameter of the FMMSMs was about 100 nm and the in vitro release result showed that the applied magnetic field could influence the release process. The result of the inhibition rate of the 10-HPCT loaded FMMSNs to HepG-2 cells revealed that they could be influenced by the applied magnetic field or the folic acid bonded on the surface of the mesoporous nanoparticles.
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JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-18
·
IF 9.429
Xia Ya-Nan,Zu He,Guo Haoxiang,Jiang Tianyan,Yang Siqi,Yu Huan,Zhang Shaodian,Ding Heng,Li Xiaoyu,Wang Yangyun,Wang Yong,Zhang Leshuai W.
Albumin-biomineralized copper sulfide nanoparticles (Cu 2−x S NPs) have attracted much attention as an emerging phototheranostic agent due to their advantages of facile preparation method and high biocompatibility. However, comprehensive preclinical safety evaluation is the only way to meet its further clinical translation. We herein evaluate detailedly the safety and hepatotoxicity of bovine serum albumin-biomineralized Cu 2−x S (BSA@Cu 2−x S) NPs with two different sizes in rats. Large-sized (LNPs, 17.8 nm) and small-sized (SNPs, 2.8 nm) BSA@Cu 2−x S NPs with great near-infrared absorption and photothermal conversion efficiency are firstly obtained. Seven days after a single-dose intravenous administration, SNPs distributed throughout the body are cleared primarily through the feces, while a large amount of LNPs remained in the liver. A 14-day subacute toxicity study with a 28-day recovery period are conducted, showing long-term hepatotoxicity without recovery for LNPs but reversible toxicity for SNPs. Cellular uptake studies indicate that LNPs prefer to reside in Kupffer cells, leading to prolonged and delayed hepatotoxicity even after the cessation of NPs administration, while SNPs have much less Kupffer cell uptake. RNA-sequencing analysis for gene expression indicates that the inflammatory pathway, lipid metabolism pathway, drug metabolism-cytochrome P450 pathway, cholesterol/bile acid metabolism pathway, and copper ion transport/metabolism pathway are compromised in the liver by two sizes of BSA@Cu 2−x S NPs, while only SNPs show a complete recovery of altered gene expression after NPs discontinuation. This study demonstrates that the translational feasibility of small-sized BSA@Cu 2−x S NPs as excellent nanoagents with manageable hepatotoxicity. Graphical Abstract
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PubMed
高影响因子
JOURNAL OF CHEMICAL SCIENCES
·
2022
·Vol. 134
·期 2
·1-12
·
IF 2.15
Li Wenyu,Zhu Yumei,Guo Wei,Xu Hanwen,Gong Cairong,Xue Gang
This report designed a Pt/LaCoO 3 composite electrocatalyst for electrochemical water splitting: LaCo 0.94 Pt 0.06 O 3 was prepared via the sol-gel method and then dealt with a heat treatment in 10% H 2 /Ar atmosphere at 350 °C. The XRD, HRTEM, SEM and XPS results show that the Pt nanoparticles (NPs) exsolve from the perovskite lattice and are homogeneously distributed on the surface. The HER and OER performance of the samples was tested in 1 mol·L -1 KOH solution and the findings illustrate that compared with LaCo 0.94 Pt 0.06 O 3 , Pt/LaCoO 3 owes better OER and HER performance. The improved performance could be up to the higher ratio of oxygen vacancies and improved charge transfer. Furthermore, the synergistic effect between Pt NPs and the LaCoO 3 matrix may also take a leading part in the future. Graphical abstract Figure SEM images of the samples: (a) LaCo 0.94 Pt 0.06 O 3 ; (b) Pt/LaCoO 3 . After the exsolution, the Pt/LaCoO 3 is well-developed with smooth surface and some nanoparticles are homogeneously distributed on the surface of the samples. The exsolved Pt nanoparticles can accelerate the electron exchange process between the matrix and its adsorbed intermediates, and ultimately promote the electrochemical reaction kinetics.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 6
·1435-1445
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IF 2.726
Wang Dan,Liu Jinfang,Yang Shuqi,Ji Xin,Wang Yuliang,Omoniyi Ahmed Olalekan,Zhang Jianfu,Su Zhongmin
Water-based polymer films can be readily deposited onto a wide range of metallic materials as an environmentally friendly coating through the demulsification-induced fast solidification(DIFS) method. However, there is still a lack of in-depth understanding of the demulsification process of the water-based emulsions and their deposition processes. Herein, we demonstrate that the build-up process of the commercial water-based micron-scale waterborne polyurethane, polyvinyl acetate, polyurethane acrylate, and natural rubber polymer films is affected by the collective effect of electric field and ion diffusion exerted by anode-cathode electrode pairs, applied voltage, conduction time, electrode distance, and emulsion species. A structural investigation of as-prepared polymer films allows us to propose two new structure build-up models. During a flat film deposition, isolated islands are formed first and grow on the substrate surface, and eventually, their mutual coalescence forms the final layer. Whereas, for a convex layer formation, the layer is first formed in the middle of the substrate and then grows toward the sides of the convex structure of the substrate. The results presented in this work expand the understanding of the mechanism of the DIFS process and may provide some new insights into structure-oriented multifunctional material design.
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MICROCHIMICA ACTA
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2022
·Vol. 189
·期 11
·1-11
·
IF 6.408
Wang Hongwei,Tang Ruizhi,Jia Shicong,Ma Shujuan,Gong Bolin,Ou Junjie
Enrichment of phosphopeptides before mass spectrometry (MS) analysis is essential due to the limitations of low abundance and poor ionization efficiency in complex biological samples. Immobilized metal affinity chromatography (IMAC), especially titanium ion (Ti 4+ )-IMAC, has become a popular strategy for enrichment of phosphopeptides due to high selectivity and sensitivity. Conventional Ti 4+ -immobilized macroporous adsorption resin (MAR) fabricated by monolayer modification can preferentially capture mono-phosphopeptide over multi-phosphopeptides, which takes on more functions in the regulation of cell behaviors of organism. In this paper, a kind of monodisperse MAR microsphere with functional polymer brush (Ti 4+ -Brush@MAR) was prepared and modified via surface-initiated atom transfer radical polymerization (SI-ATRP). Compared with common Ti 4+ -MAR without polymer brush, Ti 4+ -Brush@MAR exhibited high enrichment specificity not only for mono-phosphopeptides but also for multi-phosphopeptides in β -casein or milk digest samples. As a result, a total of 93 unique phosphopeptides mapped to 18 phosphoproteins were identified from 5 μL milk, and the limit of detection is 10 fmol. It is expected that Ti 4+ -Brush@MAR would be utilized to enrich both multi-phosphopeptides and mono-phosphopeptides in additional biological or food samples. Graphical abstract
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 29
·8179-8189
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IF 4.478
Ouyang Qin,Wang Baoning,Ahmad Waqas,Yang Yongcun,Chen Quansheng
Staphylococcus aureus ( S. aureus ) is a common pathogen that is dangerous to humans’ health. Herein, a novel upconversion fluorescent biosensor based on fluorescence resonance energy transfer from aptamer-labeled upconversion nanoparticles (UCNPs-apt) as donor and cobalt oxyhydroxide (CoOOH) nanosheets as acceptor was designed to detect S. aureus in complex matrices . The principle of the work relies on fluorescence resonance energy transfer as UCNPs-apt can self-assemble on CoOOH nanosheet surfaces by van der Waals forces to effectively quench the fluorescence. When S. aureus was added, the aptamer was able to preferentially capture the target, resulting in the dissociation of donor and acceptor and the recovery of fluorescence. The structure and morphology of the nanostructures were assigned in detail by a series of characterizations, and the energy transfer mechanism was evaluated by time-resolved lifetime measurements. Under the optimal conditions, a linear calibration plot was obtained in a concentration range of 45–4.5 × 10 6 CFU/mL with a limit of detection of 15 CFU/mL. In addition, the proposed biosensor was used for S. aureus detection in real samples (e.g., pork, beef), and the detection result showed no significant difference ( p > 0.05) compared with the conventional plate count approach. Hence, the fabricated biosensor holds a potential application for S. aureus in food analysis and public health. Graphical abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 36
·17188-17202
·
IF 4.682
Ouyang Yuanyong,Zhang Zihao,Huang Wei,Yang Wenzhong,Shen Chuanlai,Chen Yun,Yin Xiaoshuang,Liu Ying
Fluorinated hydroxyapatite-titanium dioxide coating (F-doped HA-TiO 2 ) was deposited in situ onto AZ31 Mg alloy using electrodeposition method. XRD and EDS confirmed the crystal structure and composition of the coating. SEM images showed that the F-doped HA-TiO 2 coating on the surface of AZ31 Mg alloy was extremely uniform and the thickness of coating was reflected by the cross-sectional image. Corrosion behavior of the coating modified Mg alloy was tested by electrochemical and immersion experiments. Compared to the corrosion current density ( I corr ) of the uncoated AZ31 Mg alloy in Hank’s solution, the I corr of F-doped HA-TiO 2 coating was decreased almost 4 orders. The coated AZ31 Mg alloy showed superior biocompatibility, which was strongly demonstrated by the amounts of cells increased in cell culture. The results of hemolysis tests also illustrated that the F-doped HA-TiO 2 coating met the requirements of biomedical materials.
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JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 30
·期 2
·363-376
·
IF 2.523
Zhu Zaisheng,Zhao Xiaoxi,Liu Yujie,Tian Yong,Wang Xiufang
Hollow mesoporous carbon nanospheres with accessible interior cavity, short diffusion length, and abundant mesopore channels can favor guest encapsulation and facilitate mass diffusion and transfer. However, there still remains great challenge in controllable synthesizing mesoporous carbons with uniform hollow architectures and relatively large mesopores by a straightforward method. Herein, a self-generating dual template synergetic assembly strategy was developed to construct hollow structured nitrogen-doped mesoporous carbon nanospheres (NMCNs) for the first time. Differentiating from conventional emulsion template methods, this synthesis involved the generation of nanoemulsion, which was driven by the interaction between oleic acid and triethanolamine based on the newborn soap effect. The process from alkalic to acidic environment induced the polymerization of the 3D cross-linking framework and established coulomb forces for dual template synergetic assembly. Significantly, the inner-cavity size of NMCNs could be facilely changed by simply varying the addition of oleic acid. Furthermore, varying the ethanol/water volume ratio would regulate the surface roughness of the NMCNs by directing the polymerization mode. This method innovatively coupled the dual template strategy and emulsion polymerization system, providing new insight into the construction of hollow mesoporous materials. Impressively, the hollow NMCNs featured dual pore size (5.2, 8.6 nm), high surface area (≈ 723.48 m 2 /g), and high nitrogen content (12.24 wt%), which delivered enhanced release rate and in vitro bioactivity of insoluble drug curcumin.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 39
·期 8
·2229-2238
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IF 3.146
He Lei,Dai Yong,Wang Zhe,Yang Lutao,Zhang Luxia,Hu Pengpeng,Tian Yu,Mo Hong,Zhu Haomiao,Zhang Jun
Oilfield wastewater has a significantly negative influence on the recovery efficiency due to its hypersalinity. Therefore, magnetic graphene oxide (GO) modified with ethylene diamine tetraacetic acid (EDTA) and grafted by polyethylene glycol (PEG) nano-adsorbent was prepared to remove the Ca 2+ and Cr 6+ in Jidong Oilfield wastewater specifically. It was noteworthy that PEG- g -EDTA/Fe 3 O 4 /GO nano-adsorbent had excellent adsorption performance, with removal ratios up to 71.6% for Ca 2+ and 42.7% for Cr 6+ at 30 min. After the fifth recycling run, the nano-adsorbent still remained with high removal ratios (69.3% for Ca 2+ and 30.5% for Cr 6+ ) and high reuse rates (89.4% for Ca 2+ and 95.2% for Cr 6+ ), indicating that the nano-adsorbent had outstanding adsorption-desorption efficacy and high reusability. The adsorption test results demonstrated that the total salinity of the treated oilfield wastewater decreased by about 5,000 ppm, and the displacement efficiency further increased by 12.5% by chemical flooding compared with the untreated wastewater. Therefore, PEG- g -EDTA/Fe 3 O 4 /GO nano-adsorbent is an adsorbent with excellent potential which can effectively remove Ca 2+ and Cr 6+ in oilfield wastewater to enhance oil recovery (EOR).
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危险品化学品经营许可证（带存储）