APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Zhangtao Liu,Shuhan Fu,Yuhui Wang,Zhenyang Xu,Yueguang Chen,Ning Xiao,Shangyi Li,Tingting Zhang
A novel spin-state engineering strategy was developed via La doping to break the “oxo wall” and boost high-valent Co(IV)=O generation for efficient per- and polyfluoroalkyl substances (PFASs) degradation. This was achieved by constructing unsaturated CoO 3 single atoms anchored on La-doped MCM-48 (CoLa@MCM-48) via one-pot synthesis, which enabled synergistic activation of peroxymonosulfate and ozone. The optimized catalyst achieved 99.5 % degradation of PFASs substitute sodium p-perfluorous nonenoxybenzene sulfonate (OBS) in 30 min, while maintaining robust performance across diverse water matrices. The incorporation of La induces asymmetric lattice strain through its large ionic radius and spin-orbit coupling, transforming the Co coordination geometry from conventional octahedral symmetry to an unsaturated trigonal planar CoO 3 configuration with a high-spin state, thereby enhancing the 88.8 % generation of Co(IV)=O. This work establishes heteroatom-mediated spin-state engineering for designing high-performance non-radical catalysts to remediate recalcitrant pollutants.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 33
·2316654
·
IF 18.5
Feng Xu,Ming Chen,Yaoxuan Cui,Libin Qian,Jin Wang,Zhao Han,Yanli Lu,Di Wang
The electronic nose aims to emulate the olfactory capabilities of osmatic animals, utilizing olfactory sensing array with different sensing characteristics to perceive odors. However, the separate precursors and preparation methods of sensing materials pose challenges in the fabrication of an olfactory sensing array. In this work, the customization of the surface crystal phase of Sr─Fe─O materials (SFO) is demonstrated through the control of annealing temperature, enabling the simple fabrication of an olfactory sensing array using a single precursor. Significantly, the SFO materials exhibit diverse proportions of surface crystal phases, showcasing varied selective characteristics toward volatile organic compounds (VOCs). The materials also demonstrate remarkable responsiveness, linearity, and response/recovery times. Furthermore, this study unraveles the intricate gas-sensor mechanism through first principle calculations, revealing that Fe spin-down d band center of Sr 3 Fe 2 O 7 , located near the Fermi level, significantly enhances the binding strength of intermediates, leading to a higher response specifically to certain VOCs. Integrating these materials into a unified device, the sensor array quantitatively and discriminatively detected different VOCs. The results indicate that SFO materials hold tremendous potential as a promising and easily manufacturable olfactory material system.
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Reaction Kinetics Mechanisms and Catalysis
·
2024
·
IF 1.7
Lin Guangqiang,Mao Chunfeng,Li Menghua,Wang Ziyi,Li Qinyi,Zhan Jiaqing,Liu Junsheng
In this study, Zn–W–Bi–O catalysts with a sandwich structure were prepared by mixing zinc tungstate and bismuth nitrate to form bismuth tungstate at the interface. The catalyst was composed of bismuth nitrate as the upper layer, zinc tungstate as the lower layer, and phase interface (bismuth tungstate) as the core. The generation of phase interfaces provides a new reaction mechanism for catalytic processes. Based on the different intermediate state changes in the reaction process, the Zn–W–Bi–O catalysis system can be divided into H-S Mechanism, B-R Mechanism, and P-G Mechanism. These reaction mechanisms will simultaneously react with H 2 O 2 to generate various transition states, which will cooperatively oxidize sulfur atoms to remove them. The structural characteristics and stability of Zn–W–Bi–O catalysts were determined. There are strong stability and catalytic efficiency for Zn–W–Bi–O catalysts. The desulfurization rate can be close to 100% under optimal conditions (Catalyst of 0.02 g, ionic liquids of 0.5 mL, H 2 O 2 of 0.2 mL, model oil of 5 mL, 80 °C). Zn-W-Bi-O-2 catalysts lead to 3 times improvement in ODS activity for the upper layer and 1.25 times improvement in ODS activity for the lower layer. The catalytic reaction mechanism was obtained by the structure-activity relationship.
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DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2021
·
IF 9.147
Junmeng Lu,Xinglian Xu,Xue Zhao
In the current study, the interfacial rheological properties of alkali pH-shifted MP under pH 11.0 → 7.0, pH 11.5 → 7.0 and pH 12.0 → 7.0 have been firstly investigated. The molecular weight and microstructure of myofibrillar protein (MP) treated by alkali pH-shifting were investigated by gel-permeation chromatography (GPC) and transmission electron microscopy (TEM). Results indicated a swollen, organized and aggregated structure of refolded MP. Overall, the molecular change in refolded MP led to faster protein adsorption towards the O/W interface, enhanced intermolecular interaction between adsorbed proteins and improved elasticity of interfacial film compared to native MP. After β-mercaptoethanol (β-ME) was added, the advantage of refolded MP in diffusion phase no more existed due to the disruption of aggregation and decreased molecular size, besides the penetration and rearrangement were interfered because the disruption of disulfide bond inhibited the formation of interfacial protein layers. With the protein concentration increasing, MP molecules crowding at O/W (oil in water) surface limited the development of a highly elastic network. As revealed by Tween 20 displacement, MP layers with higher interfacial elasticity were more resistant to displacement. Moreover, after displacement the coalescence stability of emulsion droplet was enhanced but the mechanical strength of interfacial MP layer was reduced. Altogether MP (0.04 or 0.2 mg/mL) treated by pH 11.0 → 7.0 exhibited the best adsorption performance and interfacial properties, which were important in stablizing emulsions. Thus, interfacial behavior regulation by alkali pH-shifting may be a applicable process for developing meat protein-based emulsions in food industry.
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DRUG DELIVERY
·
2019
·
IF 3.829
Jiu Wang,Yajing Wang,Ziqiang Wang,Fan Wang,Jie He,Xiaoyun Yang,Weidong Xie,Ying Liu,Yaou Zhang
The present study aims at designing a thermosensitive gel prepared from w1/o/w2 multiple microemulsions (MMEs) for the vaginal delivery of siRNA. The w1/o/w2 MMEs were prepared by two-step emulsifications: the first step was to prepare primary emulsions (w1/o) by low energy emulsification (LEE); the second step was to obtain stable w1/o/w2 MMEs by self-emulsifying. An extensive formulation optimization process was undertaken. The final w1/o/w2 MMEs could be formed in ddH2O, phosphate buffer solution (PBS, pH 7.4) and 1640 culture media with diameter size about 166.5 ± 13.1, 271.0 ± 11.1 and 278.7 ± 12.1 nm respectively. The release rates of siRNA from solutions, MMEs and MMEs-gels were completed within 2 h, 6 h and13 h respectively. The transfection efficiency of MMEs was confirmed both in vitro and in vivo. The relative target gene expressions of MMEs were 0.07 ± 0.05% vs. 0.37 ± 0.06% in Hela cells against Lipofectamine2000® and 1.88% ± 0.00% vs. 9.65% ± 0.02% in mouse vaginal mucosa against PEI. Good biocompatibility of MMEs was verified by cytotoxicity and pathological studies. Overall, our results indicated the potential of the MMEs-gel system for the vaginal delivery of siRNA.
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PubMed
高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2022
·Vol. 194
·期 11
·5274-5291
·
IF 3.094
Lei Jiping,Tang Kexin,Zhang Ting,Li Yan,Gao Zhen,Jia Honghua
2-O-α-D-Glucosyl glycerol (2-αGG) can be used as a multipurpose anti-aging, cell-stimulating, and skin moisturizing agent in the cosmetic industry. Sucrose phosphorylase (SPase) has been widely used in the production of 2-αGG. In this paper, the gene encoding sucrose phosphorylase from Bifidobacterium longum (BlSP) was inserted into pRSF-Duet-1 to construct the recombinant plasmid pRSF-BlSP and was functionally expressed in E. coli BL21(DE3) to be used as a biocatalyst for the synthesis of 2-αGG firstly. The mutations of BlSP were carried out based on alanine scanning, and a positive mutant G293A with a 50% increase in activity for 2-αGG production was identified. Mutant G293A has less K m and bigger k cat / K m towards glycerol than the parental BlSP. Subsequently, the production of 177.6 g/L 2-αGG was attained from 1 M sucrose and 1.2 M glycerol catalyzed by 17 mg/mL G293A mutant. This study indicated that BlSP has good potential in the production of 2-αGG.
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PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 51
·29141-29146
·
IF 2.936
Chuncheng Ban,Ling Li,Liuxiao Wei
Boron-nitride nanotubes (BNNTs) are a common one-dimensional (1D) nanostructure that possess piezoelectric potential due to ion-covalent boron-nitride (BN) bonding. Harnessing the advantages offered by high-stability BN structures, these materials have been used for various new applications such as nanogenerators, nanotransistors, and nano-artificial eardrums. In this paper, we used nano-iron oxide red as a catalyst and boron powder in an aqueous dispersion as the boron source to synthesize high-purity O-self-doped BNNTs and film. We investigated the electrical properties of O-self-doped BNNTs and the piezoelectricity of freestanding BNNT film and demonstrated that the electrical properties of O-self-doped BNNTs improved dramatically compared to those of non-doped BNNTs. We also analyzed the band gaps and density of states (DOS) of the O-self-doped BNNTs with the Spanish Initiative for Electronic Simulation with Thousands of Atoms (SIESTA) code to explain the improvement. In addition, we revealed the piezoelectric voltage coefficient g31 of O-self-doped BNNTs (0.28 V m N−1) network films, which can guide future applications for vibration nanosensors and transducers under extreme conditions.
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高影响因子
CHEMICO-BIOLOGICAL INTERACTIONS
·
2020
·
IF 3.723
Mingfei Wu,Xingxing Zhu,Yilong Zhang,Min Wang,Tongtong Liu,Jianfei Han,Jun Li,Zeng Li
A series of 7- O -amide hesperetin derivatives were subjected to multi-target biological evaluation of anti-Alzheimer's disease. Most of the compounds showed good in vitro inhibitory activity against cholinesterase , of which compound 7c (7- O -(4-(morpholinoethyl)-acetamide) hesperetin) was the most effective anti-eqBuChE derivative (IC 50 = 0.28 ± 0.05 μM) and exerted neuroprotective effects. Further biological evaluation found that compounds 4d , 4e and 7c showed strong antioxidant, anti-Aβ self-aggregation and anti-neuroinflammatory activities. Compound 7c could inhibit the expression of iNOS and COX-2 proteins and prevent LPS-induced inflammatory response in BV2 cells. In addition, compound 7c could chelate biometal ions such as Cu 2+ and Zn 2+ . In the vivo study, the MWM test confirmed that compound 7c could improve the cognitive impairment caused by scopolamine . In summary, the above studies have shown that the optimized compound 7c has great development potential as MTDL for the treatment of AD.
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高影响因子
MACROMOLECULAR BIOSCIENCE
·
2013
·Vol. 14
·期 2
·280-288
·
IF 3.742
Feifei Li,Bin Chen,Zhaohua Ping,Xiangxiang Jia,Xin Guo,Longqiang Xiao,Lijian Liu
Lipophilic 6- O -poly ( ϵ -caprolactone)- L -ascorbic acid (AA-6-PCL) is synthesized through ROP of ϵ -caprolactone (CL). The number of repeating CL units in the polymer chain varies from 6 to 19. AA-6-PCL loaded supramolecular polymer micelles (SMPMs) are constructed with β-cyclodextrin (β-CD) and PCL as blocks. Transmission electron microscopy images show a nanospheric morphology of the micelles with a size range of 43.3 ± 5.0 nm. The drug loading contents are 22.53–39.23% for AA-6-PCL. AA-6-PCL exhibits high radical scavenging capacity (93.96–96.73%) and efficient scavenging potency, and a cytotoxicity study proves the excellent cytocompatibility of AA-6-PCL loaded β-CD/PCL SMPMs, which altogether herald their potential application in the study of the induced pluripotent stem cells.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yu Liu,Lu Han,Jinhao Zhang,Ruxue Yao,Haoqi Zhan,Huawei Yang,Liangjiu Bai,Lixia Yang,Donglei Wei,Wenxiang Wang,Hou Chen
O2 activation for the green conversion of chemicals has attracted a great deal of attentions in the field of chemistry. Developing catalysts for aerobic oxidation with both prominent instinct activity and desirable micro/nanostructure remains a tough challenge. In this work, hierarchical hollow Co–Ni–Mo–O mixed metallic-oxide nanotubes constructed by ultrathin CoMoO4/NiMoO4 nanosheets were fabricated using a sacrificial template method and employed as catalysts in aerobic oxidative desulfurization (AODS) of a model fuel. With air as the oxygen source, the catalyst demonstrated surprisingly high activity by achieving complete conversion of dibenzothiophene under mild reaction conditions. Besides, the catalyst demonstrated excellent stability on continuous repeated use. A further mechanism study reveals the electron coordination and transfer between different metal species as well as the activation route of O2. Based on the above-mentioned results, the catalyst which allows a good exposure of metal centers, a high concentration of oxygen vacancies, and the desired electronic structure is expected to serve as the high-performance AODS catalyst.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 45
·19868-19879
·
IF 3.288
Sleshi Fentie Tadesse,Dong-Hau Kuo,Worku Lakew Kebede,Lalisa Wakjira Duresa
Discharging of organic pollutants from industrial activities into the water bodies is a common worldwide problem, which can adversely affect human life and the environment. Recently, many efficient, eco-friendly, and cost-effective photocatalytic methods have been investigated for environmental remediation. In this study, a simple and facile precipitation method at low temperature was proposed for the synthesis of V-doped Mo(O,S)2 oxysulfide. The crystallinity, morphology, elemental composition, and optical and electrical properties of the as-synthesized materials were characterized by XRD, Raman spectroscopy, FT-IR spectroscopy, FE-SEM, TEM, XPS, PL, and EIS. The photocatalytic performance of both bare and V-doped Mo(O,S)2 was evaluated in the degradation of methylene blue (MB) dye. The holes (h+) and hydroxyl radicals (OH˙) were identified as the main oxidative species for MB degradation. V-Mo(O,S)2-10 synthesized with 10% vanadium precursor showed the highest photocatalytic efficiency for MB degradation under visible light irradiation with an apparent rate constant of 0.028 min−1, which was much greater than that of bare Mo(O,S)2 at 0.0098 min−1. Besides, V-Mo(O,S)2-10 had the lowest recombination rate of electron–hole pairs and charge transfer resistance to enhance the photocatalytic activity, as evidenced by PL and EIS analyses. Therefore, V-doped Mo(O,S)2 can be a potential candidate for photocatalytic degradation of organic dyes for environmental remediation.
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高影响因子
KINETICS AND CATALYSIS
·
2023
·Vol. 64
·期 6
·909-921
·
IF 1.1
Li Linbo,Du Yijun,Li Yao,Shao Linjun,Qi Chenze,Zhou Shujing,Li Jinjing
Abstract Developing a facile and accurate method for assessing catalytic activities of supported metals can significantly promote the preparation and application of supported metal catalysts. Herein, we synthesized five MCM-41 materials functionalized with Schiff-base groups, which were employed as the supports for copper cations. The chemical structures and coordination of copper cations on the supports were characterized by Fourier-transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The grafting densities were calculated by analyzing the results of thermal gravimetric analysis (TGA) and elemental analysis (EA). The microstructures of these supported copper catalysts were analyzed by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The oxidation of thioanisole to methylphenyl sulfoxide was employed to determine the catalytic activities of these supported copper catalysts while their o -Ps annihilation properties were evaluated by the positron annihilation lifetime spectroscopy. It is found that the o -Ps annihilation properties were linearly correlated with their catalytic activities. Therefore, the catalytic activities of supported copper species surrounded by different functional groups can be easily determined through o -Ps annihilation.
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