JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2023
·Vol. 70
·期 2
·159-170
·
IF 1.8
Wenju Zhu,Mingyang Yang,Qing Wang,Xiaohan Zhang,Dongxiang Li,Zelong Xu,Shuixia Liu,Zhao Dai
The chelating ligands of boric acid and amino trimethyl phosphonate prepared a novel flame retardant (BAP) for the cotton fabric. A stable chemical and coordination bond was formed on the surface of the cotton fibers by a simple three-curing finishing process to make the fabric exhibits excellent durable flame retardancy. Cotton fabrics' tensile strength and whiteness got substantially retained after BAP treatment. 90 g/L BAP-treated samples (3 curing times, 50 laundry cycles) showed good flame retardancy and durability, holding the largest limit oxygen index, 29.7%, and the shortest damage length, 61 mm. A condensed phase and gas phase synergistic flame retardant mechanism was concluded by thermogravimetric, cone calorimeter tests, and thermogravimetric infrared analysis.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 18
·8785-8796
·
IF 3.3
Jiaxin Zhang,Xianlang Chen,Jinhua Yu,Zheng Fang,Lele Yan,Zijian Wang,Zhengyu Pan,Rongrong Li,Li Zhang
Catalytic hydrodechlorination (HDC) is considered as one of the most promising strategies for the treatment of chlorinated environmental pollutants. Here we proposed a strategy for rapid complete dechlorination by exploiting a B–N co-doped hierarchically porous carbon material (BNC) to immobilize Pd NPs, which makes use of not only the micro/meso porous structure to accelerate the mass transport and to provide enormous active sites, but also the synergistic effect for codoping of B–N to enhance the interaction between Pd NPs and support and thus to stabilize and disperse the small size of the Pd particle. Ascribed to these combined advantages, Pd/BNC exhibited more distinctive catalytic dehalogenation activity (k = −0.14 min−1) and better stability (about 90.0% activity retention after 5 cycles) than Pd/C (k = −0.0070 min−1). Additionally, density functional theory (DFT) calculation indicates that the incorporation of N and B atoms in the carbon skeleton will reduce the adsorption energy of Cl− and thus Pd/BNC exhibits more remarkable stability than Pd/C during long-term HDC reactions. As a result, ultrafine Pd particles and high Pd2+/(Pd2+ + Pd0) ratios were found in Pd/BNC.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Hyok-Chol Ri,Chol-San Jon,Liu Lu,Xiangfan Piao,Donghao Li
For the isolation of flavonoids , a novel magnetic and efficient boronic acid (BA)-functionalized iron oxide particle was prepared and applied to a dynamic electromagnetic-field-assisted solid-phase extraction (DeMF-SPE) device. With the help of the dynamic electromagnetic field , it is possible to form a microcolumn with dynamic dispersion of boronic acid-modified magnetic sorbents . As the sample passes through the extraction region, the magnetic sorbent in its dynamic motion enables high-efficiency extraction through active and countless contacts with the target. Meanwhile, five flavonoids (quercetin (Qu), wogonoside (Wo), isoquercetin (Is), daidzin (Da), and baicalein (Ba)) were selected to investigate the selective entrapment of boronic acid modified magnetic particles during the DeMF-SPE process. Several parameters affecting adsorption and desorption conditions were investigated and optimized. Under optimal conditions, the DeMF-SPE–HPLC–MS/MS approach has a wide linear dynamic range and good linearity ( R 2 > 0.99), low detection limits (0.16–1.25 μg L –1 ), and satisfactory recovery (94.9–106.2%). The analytical method was applied to real samples and showed satisfactory adaptability. Therefore, dynamic electromagnetic field-assisted solid-phase extraction (DeMF-SPE) using the prepared magnetic particles can be considered an efficient and rapid analytical method for extracting flavonoids from onion samples.
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ChemSusChem
·
2023
·Vol. 16
·期 12
·e202300133
·
IF 8.4
Changqu Lin,Hao Yang,Xin Gao,Yue Zhuang,Caojian Feng,Hongli Wu,Haifeng Gan,Fei Cao,Ping Wei,Pingkai Ouyang
Graphical An alkali catalytic system for the selective conversion of N -acetyl- d -glucosamine (NAG) into unsubstituted 3-acetamidofuran (3AF) via retro-aldol condensation has been developed. 3AF with 73.9 % yield is obtained in the presence of a ternary Ba(OH) 2 −H 3 BO 3 −NaCl catalytic system. Aminofurans are widely used in drug synthesis as aromatic modules analogous to aniline. However, unsubstituted aminofuran compounds are difficult to prepare. In this study, a process for the selective conversion of N -acetyl- d -glucosamine (NAG) into unsubstituted 3-acetamidofuran (3AF) is developed. The yield of 3AF from NAG catalyzed by a ternary Ba(OH) 2 −H 3 BO 3 −NaCl catalytic system in N -methylpyrrolidone at 180 °C for 20 min can reach 73.9 %. Mechanistic studies reveal that the pathway to 3AF starts with a base-promoted retro-aldol condensation of the ring-opened NAG, affording the key intermediate N -acetylerythrosamine. Judicious selection of the catalyst system and conditions enables the selective conversion of biomass-derived NAG into 3AF or 3-acetamido-5-acetylfuran.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jie Mei,Guangya Hou,Huibin Zhang,Qiang Chen,Huazhen Cao,Yiping Tang,Jianli Zhang,Guoqu Zheng
In multifunctional catalysts, Ni-based alloys and compounds can be used for methanol oxidation reaction (MOR) and urea oxidation reaction (UOR). Herein, the porous dendritic NiCu@PPy/316L stainless steel mesh (SSM) electrode is prepared by dynamic hydrogen bubble template electrodeposition, followed by cyclic voltammetry electrodeposition of polypyrrole (PPy) conductive polymer on the electrode surface. Among them, dynamic hydrogen bubbles successfully assisted the formation of porous structures in the Ni-based deposition layer. In addition, the morphology of the resulting Ni-based layer further evolves from particle stacking to dendritic with high specific surface area with Cu doping. Eventually, 2-NiCu/SSM achieves current densities of 294.5 mA·cm −2 (MOR) and 278.6 mA·cm −2 (UOR) at 0.8 V, respectively. The PPy coating prevents the agglomeration of NiCu particles in the catalytic layer and further improves the persistence of the electrochemical performance. After 2000 cycles, the current densities of 2-NiCu @PPy/SSM in the new electrolyte are maintained at 89.1% (MOR) and 94.8% (UOR) of the original value, with a 10% increase for MOR and a 7% increase for UOR compared to the sample without PPy coating (2-NiCu /SSM).
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ChemistrySelect
·
2023
·Vol. 8
·期 9
·e202204413
·
IF 2.1
Pengxin Li,Huanzhao Liu,Chunyu Wang,Yi Fang,Zhonglu Guo,Jing Lin,Yang Huang,Chao Yu,Long Hu,Chengchun Tang,Zhenya Liu
Graphical The article reports the successful preparation of Cu 0.9 Ni 0.1 / p -BN nanocomposites as catalyst by a facile in situ reduction method using p -BN as a template. The hollow porous Cu 0.9 Ni 0.1 / p -BN composites exhibited excellent catalytic performance in the dehydrogenation from methanolysis of ammonia-borane. Dehydrogenation from methanolysis of ammonia borane is a promising strategy for the development of sustainable hydrogen energy. Developing an effective and inexpensive catalyst is essential. In our study, a series of Cu−Ni nanoparticles, in the form of alloy, are supported onto porous boron nitride fibers by impregnation reduction. Cu and Ni synergistically interact through the alloys, Cu 0.9 Ni 0.1 / p -BN demonstrates excellent catalytic effect with high turnover frequency (27.1 min −1 ) and low activation energy (27.8 kJ/mol) at 298 K. Kinetics indicates that the catalyst concentration follows the quasi-primary reaction. Moreover, the pores of the p -BN supporter prevent agglomeration of the metal particles while limiting their size, as well as providing protection to the particles. After passing 8 cycles, the catalyst does not suffer from severe poisoning effects. This work greatly enriches the non-precious metal catalyst system and plays a very meaningful role in the study of dehydrogenation from methanolysis of AB.
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Acta Biomaterialia
·
2023
·
IF 9.7
Yanan Xu,Weiqiang Wang,Fengyun Yu,Shuaikang Yang,Yonghui Yuan,Yinong Wang
Pure Fe is a potential biodegradable stent material due to its better biocompatibility and mechanical properties , but its degradation rate needs to be improved. Alloying with Zn to form Fe-Zn alloy is anticipated to meet the degradation rate requirements while retaining the iron's inherent properties. Therefore, Fe-Zn alloys with monolayered and multilayered structures were prepared by electrodeposition . The alloys' composition, microstructure, mechanical properties, in vitro degradation and biocompatibility were assessed. Results showed that the Zn content ranged from 2.1 wt% to 11.6 wt%. After annealing at 450°C, all the alloys consisted of α(Fe) solid solution and Zn-rich B2 ordered coherent phase, except for the alloy with 11.6 wt% Zn content, in which a Fe 3 Zn 10 phase appeared. The layered structure consisted of alternating columnar-grain and nano-grain layers, which compensated for the intrinsic brittleness of electrodeposited metals and improved the galvanic effect of the alloy, thus increasing the strength and plasticity and changing the corrosion from localized to uniform while augmenting the corrosion rate. The yield strength of the multilayered alloy exceeded 350 MPa, its elongation was more than 20%, and its corrosion rate obtained by immersion test in Hank's solution reached 0.367 mm·y −1 . Fe-Zn alloys with lower Zn content had good cytocompatibility with the human umbilical vein endothelial cells and good blood compatibility. The above results verified that the multilayered Fe-Zn alloy prepared by electrodeposition presented enhanced mechanical properties, higher degradation rate, uniform degradation mechanism and good biocompatibility. It should be qualified for the application of biodegradable stents. Statement of significance A potential biodegradable Fe-Zn alloy, which is difficult to be obtained by the metallurgical method, was prepared by electrodeposition to solve the low degradation rate of iron-based biomaterials. A multilayered microstructure design composed of alternating columnar-grain and nano-grain layers was achieved by changing the electrical parameters. The layered design compensated for the intrinsic poor plasticity of electrodeposited metals. It increased the galvanic effect of the alloy, thus augmenting the corrosion rate and changing the corrosion mode of the alloy from localized to uniform corrosion. The yield strength of multilayered alloy exceeded 350 MPa; its elongation was more than 20%. Moreover, the layered alloy had good cytocompatibility and blood compatibility. It indicates that the alloy is qualified for biodegradable stent application.
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ANALYTICAL SCIENCES
·
2023
·Vol. 39
·期 6
·935-943
·
IF 1.6
Wang Jingyu,Cui Yunyi,Lin Ying,He Yi
Abstract A long-standing challenge in colorimetric detection of triacetone triperoxide (TATP) explosive is low sensitivity. We herein developed an iodine-mediated photoinduced auto-inductive tandem chromogenic system to achieve exponential signal amplification. The strategy employs the KI-TATP reaction and photo-induced autocatalytical oxidation of o-phenylenediamine (OPD) that work in tandem. The resulting I 3 − from the KI-TATP reaction oxidizes OPD to yellow 2,3-diaminophenazine (DAP) that is further excited by blue light illumination to produce reactive oxygen species (ROS). The obtained ROS, in turn, promotes the oxidation of OPD to gain more DAP, causing the auto-inductive chromogenic reaction processes. This tandem chromogenic system is applied for visual colorimetric detection of TATP, allowing the selective and sensitive detection of TATP down to 42.8 μM. Moreover, analyses of TATP in real samples are performed, and the satisfactory recovery results are achieved. Furthermore, a field detection kit is also developed. Graphical abstract
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Bioactive Materials
·
2023
·
IF 18.9
Ming Li,Yuan Gao,Miaowen Jiang,Hongkang Zhang,Yang Zhang,Yan Wu,Wenhao Zhou,Di Wu,Chuanjie Wu,Longfei Wu,Luzi Bao,Xiaoxiao Ge,Zhengfei Qi,Ming Wei,Ang Li,Yuchuan Ding,Jicheng Zhang,Guangzhen Pan,Yu Wu,Yan Cheng,Yufeng Zheng,Xunming Ji
Selective endovascular hypothermia has been used to provide cooling-induced cerebral neuroprotection, but current catheters do not support thermally-insulated transfer of cold infusate, which results in an increased exit temperature, causes hemodilution, and limits its cooling efficiency. Herein, air-sprayed fibroin/silica-based coatings combined with chemical vapor deposited parylene-C capping film was prepared on catheter. This coating features in dual-sized-hollow-microparticle incorporated structures with low thermal conductivity. The infusate exit temperature is tunable by adjusting the coating thickness and infusion rate. No peeling or cracking was observed on the coatings under bending and rotational scenarios in the vascular models. Its efficiency was verified in a swine model, and the outlet temperature of coated catheter (75 μm thickness) was 1.8–2.0 °C lower than that of the uncoated one. This pioneering work on catheter thermal insulation coatings may facilitate the clinical translation of selective endovascular hypothermia for neuroprotection in patients with acute ischemic stroke.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shi Feng Zai,Yu Han Wu,Yi Tong Zhou,Zhao Tian Hui Li,Chun Bin Guo
Rational design of low-cost and high-efficiency electrocatalysts for hydrogen evolution reaction (HER) is critical for scalable and sustainable hydrogen production from economical water-alkali splitting. Herein, density functional theory (DFT) calculations reveal that coupling NiO x and CoP could effectively boost overall HER kinetics through lowing the H 2 O dissociation barrier, accelerating the OH* transfer process, and providing the rapid H* migration kinetics as well as the appropriate H* energetics. Based on these findings, we successfully prepared a three-dimensional (3D) self-supported electrode of ultrathin CoP nanosheets directly grown on the surface-oxidized Ni nanotube arrays via a simple and scalable electrochemical synthesis method. As expected, such a heterostructure electrode exhibits superior alkaline HER performance with low overpotentials of 51 and 164 mV to drive the current densities of 10 and 500 mA cm −2 , respectively, outperforming most of the efficient alkaline HER electrocatalysts.
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Coatings
·
2023
·Vol. 13
·期 4
·695
·
IF 3.4
Gen Li,Zhixiang Chen,Zhiwen Tan,Ran Tian,Yuantao Zhao,Lianbo Wang,Wenge Li,Yanbo Liu
The current work synthesized Ni-SiC composite coating with different SiC microparticle contents. The role of the SiC microparticle in designing the Ni-SiC composite microstructure was revealed. The SiC microparticle physically interrupted the continuous growth of the underlying columnar Ni grains. The columnar Ni grain between the embedded SiC microparticle grew without disturbance. Only upon SiC microparticles was a new layer starting with refined Ni grains observable. The vertical columnar Ni grains reappeared as the position departed the SiC microparticle upper surface. The increase in the contents of the SiC microparticle led to an increased level of grain refinement and the elimination of the (200) fiber texture. Besides that, the number of V-shaped valleys increased as well. Corrosion testing results show that the corrosion resistance of Ni-SiC composite coating increased with the increased SiC contents, which was mainly due to the optimized microstructure.Keywords:Ni matrix composite;SiC microparticles;deposits growth behavior;grain refinement;corrosion resistance
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2023
·Vol. 224
·期 11
·2300002
·
IF 2.5
Chen Dong,Jing Gao,Yunting Zhao,TianTian Ma,Yongjun He
The recovery of indium from impregnating resins in water is usually limited by the poor bonding of the extractant to the carrier resin. Pickering emulsion hydrogels (PEHGs) encapsulating extractant bis(2-ethylhexyl) phosphate are prepared by oil-in-water Pickering emulsions polymerization method using polyvinyl alcohol and sodium alginate as continuous phases and nano-SiO 2 and alkylphenol ethoxylates-10 (OP-10) as emulsifiers. PEHGs are used to recover trivalent In(III) from water to study its encapsulation and adsorption properties. Pickering emulsions are characterized by optical microscopy. PEHGs are characterized by Fourier transform infrared spectrometer and scanning electron microscopy. The results showed that the stabilization time of Pickering emulsions improved from 3 min to ≈14 days after the addition of 5 wt.% of OP-10. The internal structure of 4 -Pickering emulsion hydrogels ( 4 -PEHGs) prepared from Pickering emulsions co-stabilized by nano-SiO 2 and OP-10 is changed from core-shell to honeycomb structure and no oil phase leakage occurred. In(III) adsorption is carried out on 4 -PEHGs. The results showed that the maximum adsorption of In(III) in water by 4 -PEHGs is 18.03 mg g −1 . The adsorption process of In(III) is controlled by chemisorption. This study showed that 4 -PEHGs can be used as an effective adsorbent for the recovery of indium in water.
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