JOURNAL OF FLUORESCENCE
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2019
·Vol. 29
·期 5
·1221-1226
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IF 1.913
Yan Liqiang,Xie Ya,Li Jianping
Development of optical probe for the detections of Fe 3+ and Cu 2+ is one of the most active and interesting research directions in analytical chemistry because of their vital roles in the environment protection and human health. Herein, a turn on optical rhodamine B-based probe (probe 1) with the significant changes in color and fluorescence has been prepared. The color of this probe solution changed from colorless to amaranth in the presence of Fe 3+ and to pink in the presence of Cu 2+ , which is promising for the qualitative recognition of Fe 3+ and Cu 2+ . More importantly, probe 1 could be used for the quantitative analysis of Fe 3+ and Cu 2+ by fluorescence enhancement. The detection limits for Fe 3+ and Cu 2+ reached 8.1 × 10 −8 M and 4.8 × 10 −7 M, respectively. Furthermore, it was found that this probe can also be used for fluorescence imaging of Fe 3+ and Cu 2+ in living cells.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Bo Song,Qiao Wang,Li Wang,Jing Lin,Xin Wei,Vignesh Murugadoss,Shide Wu,Zhanhu Guo,Tao Ding,Suying Wei
Decorating electron-accepting materials on carbon nitride (C 3 N 4 ) is a promising strategy to construct heterostructure catalysts for improved photocatalytic abilities. In this study, B-doped carbon-dots (B-C-dots) decorated C 3 N 4 (C 3 N 4 /B-C-dots) catalysts were fabricated through the surface deposition. The benefits from integration of B-C-dots and C 3 N 4 are four folds: (i) increasing surface area; (ii) improving visible light absorption; (iii) promoting the transfer of photoinduced carriers; and (iv) reducing the recombination of photoinduced carriers. The optimum photocatalytic activity of B-C-dots/C 3 N 4 for Rhodamine B (Rh B) (or tetracycline hydrochloride (TC)) degradation was about 7.21 (6.56) and 4.80 (4.35) times higher than that of C 3 N 4 and C-dots/C 3 N 4 , respectively, exhibiting both remarkable stability and repeatability. Moreover, enhanced photocatalytic activity of C 3 N 4 /B-C-dots could also be attributed to the type-II heterojunction formed between C 3 N 4 and B-C-dots caused by B doping.
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ULTRASONICS SONOCHEMISTRY
·
2019
·
IF 7.279
Guanshu Li,Ludong Yi,Jun Wang,Youtao Song
In this paper, a novel method, hydrodynamic cavitation (HC) combined with Fe 3+ -doped TiO 2 , for the degradation of organic pollutants in aqueous solution is reported. The venturi tubes with different geometric parameters (size, shape and half divergent angle) are designed to obtain a strong HC effect. The structure, morphology and chemical composition of prepared Fe 3+ -doped TiO 2 as catalyst are characterized via using XRD , SEM, TEM , XPS, UV-vis DRS and PL methods. The effects of added TiO 2 (heat-treated at different temperatures for different times) and Fe 3+ -doped TiO 2 (with different mole ratios of Fe and Ti) on the HC catalytic degradation of RhB are discussed. The influences of operation parameters including inlet pressure, initial RhB concentration and operating temperature on the HC catalytic degradation of RhB are studied by Box-Behnken design (BBD) and response surface methodology (RSM). Under 3.0 bar inlet pressure for 10 mg/L initial concentration of RhB solution at 40 °C operating temperature in the presence of Fe 3+ -doped TiO 2 with 0.05:1.00 M ratio of Fe and Ti, the best HC degradation ratio can be obtained (91.11%). Furthermore, a possible mechanism of HC degradation of organic pollutants in the presence of Fe 3+ -doped TiO 2 is proposed. Perhaps, this study may provide a feasible method for a large-scale treatment of dye wastewater.
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Journal of Materials Research and Technology-JMR&T
·
2022
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IF 6.267
Jingwu Zheng,Siyuan Wang,Shuan Zhang,Wei Cai,Liang Qiao,Haibo Chen,Yao Ying,Wangchang Li,Jing Yu,Shenglei Che
In this paper, a corrosion-resistant glutamic acid (Glu)-Cu-Nano-Al 2 O 3 composite coating with both hydrophobicity and self-healing characteristics was electrodeposited on the sintered Nd-Fe-B surface. The influence of the amount of Nano-Al 2 O 3 added in the acidic Cu 2+ -glutamate (Glu 2− ) solution on the performance of the composite coating was studied, the results show that Nano-Al 2 O 3 inclusion can make the surface of the composite coating appear papillary particles and make the composite coating hydrophobic. By analyzing the products of the composite coating after corrosion in 3.5% NaCl solution, it is shown that the codeposition copper dihydroglutamate (CuGlu 2 H 2 ) and Glu particles in the composite coating are released and dissolved in the solution with pH = 6.5 after copper corrosion, and then complexed with Cu 2+ produced by corrosion to form an insoluble copper glutamate (CuGlu) passive film, which was deposited on the corroded coating to achieve self-repairing function and prevent further corrosion. The hydrophobicity and self-repairing function of the composite coating ensure that the sintered Nd-Fe-B has excellent corrosion resistance.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2022
·
IF 5.895
Yi-Kao Hu,Yi-Ming Liu,Xiao-Lin Bai,Chao Ma,Xun Liao
Fragaria nubicola, known as Tibetan strawberry, is an edible plant possessing various health-promoting effects. However, its functional compositions were rarely studied. In this work, monoamine oxidase B (MAO-B) inhibitors in this plant were rapidly screened using the enzyme-functionalized magnetic nanoparticles coupled with UPLC-QTOF-MS. Two inhibitors, quercetin-3-O-β-d-glucuronide-6″-methyl ester (1) and kaempferol-3-O-β-d-glucuronide-6″-methyl ester (2), were identified from this plant with the IC50 values of 19.44 ± 1.17 and 22.63 ± 1.78 μM, respectively. Enzyme kinetic analysis and molecular docking were carried out to investigate the mechanism of inhibition. Contents of both compounds as well as those of total phenolics and flavonoids were quantified to be 24.76 ± 1.26, 35.59 ± 1.17, 837.67 ± 10.62, and 593.46 ± 10.37 μg/g, respectively. In addition, both compounds exhibited significant neuroprotective effects on 6-hydroxydopamine-induced PC12 cells. This is the first report on the neuroprotective components of F. nubicola, suggesting its potential for developing neuroprotective functional food.
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Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 11
·1893-1905
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IF 5.047
Ihsan Ullah,Jing Zhao,Shah Rukh,Khan Muhammad,Jintang Guo,Xiang-kui Ren,Shihai Xia,Wencheng Zhang,Yakai Feng
Gene therapy is concerned with the transfer of complement genes to functionally defective cells in a safe and directed manner for the treatment of the most challenging diseases. But safety issues and low transfection efficiency of the gene vectors are the major challenges, which need to be overcome. Recently, redox-responsive bioreducible polymers containing disulfide linkages have been considered as efficient gene vectors, owing to the selective degradation of the disulfide bond in the reducing environment of the cells. This enables spatiotemporal release of pDNA with no or minimum toxicity. Herein, we reported a bioreducible poly(ethyleneglycol)-b-poly(disulfide-L-lysine) cationic polymer (denoted as PEG–SSL) via a Michael addition reaction of poly(ethyleneglycol)tetraacrylate PEG(Ac)4 and the terminal amine group of poly(disulfide-L-lysine). PEG–SSL efficiently condensed the plasmid ZNF580 gene (pZNF580) forming nano-sized polyplexes (155 ± 4 to 285 ± 3 nm) with zeta potentials of 1.9 ± 0.1 to 26.7 ± 0.4 mV. PEG–SSL successfully retarded pZNF580 at a small polymer/pDNA weight ratio of 10/1 and higher. When exposed to a reducing environment of 5 mM DTT, it rapidly released genes even at higher weight ratios of the PEG–SSL polymer in the PEG–SSL/pDNA complexes. The PEG–SSL/pZNF580 complexes exhibited good stability when exposed to DNase I and efficiently protected pDNA from degradation. In vitro transfection and cytotoxicity were investigated in EA.hy926 cells. The results showed that PEG–SSL successfully delivered pZNF580 into the cells with less cytotoxicity compared to PEI25kDa. The flow cytometry and confocal scanning laser microscopy results indicated that PEG–SSL polyplexes exhibited good cellular uptake and nuclear co-localization rates. All these results implied that PEG–SSL had the potential as a non-viral vector for gene transfection.
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Biomaterials Science
·
2019
·Vol. 7
·期 5
·1933-1939
·
IF 5.251
Yan-Hua Zhu,Ji-Long Wang,Hou-Bing Zhang,Malik Ihsanullah Khan,Xiao-Jiao Du,Jun Wang
Polymeric nanoparticles as drug delivery systems have the potential to improve the therapeutic efficacy and reduce the toxicity of chemotherapeutic drugs by enhancing the drug selectivity in vivo. The efficacy is directly dependent on the polymeric nanoparticles’ in vivo fate. Therefore, it is very important to develop a method to stably label the polymeric nanoparticles for detecting the in vivo fate. Here, we report a method to stably label self-assembled nanoparticles by the incorporation of rhodamine B-conjugated poly(ε-caprolactone) (PCL–RhoB). Only 1% of PCL–RhoB was released from the RhoB-labeled polymeric nanoparticles (RhoB–PNPs) in phosphate buffer within 12 hours, which suggested that the signal of PCL–RhoB can be used to represent the behaviors of polymeric nanoparticles both in vitro and in vivo. PCL–RhoB could be effectively extracted and quantitatively detected by ultra-high-performance liquid chromatography (UPLC) in various media, such as PBS, a cell culture medium containing 10% FBS (pH = 7.4 and pH = 6.8), mouse serum, simulated intestinal fluid and cell or tissue lysis. The intracellular contents of PCL–RhoB in MDA-MB-231 cells detected by UPLC were linearly correlated to the concentration of the RhoB–PNPs. In addition, the contents of PCL–RhoB in plasma and the spleen were proportional to the injected dose of RhoB–PNPs in vivo. As an application example, the pharmacokinetics and biodistribution of the nanoparticles over time in vivo were analyzed following intravenous injection to confirm the feasibility of this method.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Shuchun Li,Xuefei Zhang,Xiaoyan Huang,Shuchang Wu,Zailai Xie
Developing highly active and stable nanocarbon catalysts for selective oxidation reactions has attracted much attention due to their potential as an alternative to traditional metal-based or noble metal catalysts. However, the nature of active sites and the reaction mechanism of nanocarbon catalysts for oxidation reactions still remains largely unknown, which hinders the rational design and development of highly efficient carbon-based catalysts. Here we report a facile strategy for the synthesis of boron and nitrogen co-doped carbon nanosheet material (BNC), which exhibits excellent catalytic activity with 91% conversion and 99% selectivity in selective oxidation of benzyl alcohol into benzaldehyde, superior to those of traditional carbon materials (oxidized carbon nanotubes, graphites and commercial nanocarbons). Structural characterizations and kinetic measurements are studied to clarify the active site, in which phenolic hydroxyl on BNC is responsible for the production of benzaldehyde. Meanwhile, we put forward a possible reaction mechanism and point out the key factors in determining the reactivity for this reaction. Therefore, the present work provides new insight into structure–function relationships, paving the way for the development of highly efficient nanocarbon catalysts.
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ACTA PHYSICO-CHIMICA SINICA
·
2026
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IF 13.5
Yafei Jiang,Shixing Xu,Qingze Ma,Jiaxuan Zhang,Weishuo Wang,Yanzhao Yang,Hao Tian
Converting glucose into value-added cyclic carbonates is a promising route for carbon utilization, and strongly influenced by the acidic properties and mass transport characteristics of solid acid catalysts. In this study, H-ZSM-5 nanosheets with varied Si/Al ratios were synthesized to investigate the effects of framework composition and b -axis length on glucose conversion. Increasing the Si/Al ratio decreased the density of acid sites but simultaneously reduced the b -axis length, enriched aluminum species near the external surface, and increased the relative abundance of Lewis acid sites, thereby enhancing the accessibility and utilization of active site. Consequently, H-ZSM-5_100 exhibited the highest site time yield, the lowest apparent activation energy, and the highest selectivity toward fructose and 5-hydroxymethylfurfural (5-HMF). Under optimized reaction conditions, H-ZSM-5_100 achieved a glucose conversion of 56.3% with a 5-HMF formation rate of 42.8 mmol h −1 g −1 . These results demonstrate that the catalytic performance of H-ZSM-5 nanosheets is governed by the synergistic effects of framework composition, the distribution of acid site, and crystal morphology, providing guidance for the rational design of zeolite catalysts for biomass conversion. Rational regulation of zeolite acidity and diffusion properties is crucial for efficient biomass conversion. This work presents H-ZSM-5 nanosheets with tunable Si/Al ratios are developed to reveal the synergistic effects of acid site distribution and b -axis length on glucose conversion, enabling enhanced production of fructose and 5-hydroxymethylfurfural through optimized active-site accessibility. Download: Download high-res image (175KB) Download: Download full-size image
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Hanxun Qin,Wenxuan Cao,Faqi Zhan,Qiong Liu,Jiagang Wu
Bi-induced structural distortion was strategically engineered in BaTiO3 nanowires (BT NWs) to reinforce spontaneous polarization and achieve superior piezo-photocatalytic performance for efficient dye degradation. Bi-doped BT NWs (BT_xBi NWs) were synthesized via a facile two-step hydrothermal method. Comprehensive characterizations revealed that Bi3+ substitution at the A-site induces significant lattice contraction, surface cracks, polycrystalline characteristics, and an increased tetragonal phase fraction. These structural distortions, together with an enhanced carrier concentration and optimized electronic structure, markedly improve ferroelectric polarization, charge separation efficiency, and piezoelectric response under mechanical stress. Under ultrasonic-light synergistic conditions, the optimal BT_0.04Bi NWs exhibited an exceptional Rhodamine B (RhB) degradation rate constant of 487.3 × 10-3 min-1, which surpassed most reported piezo-photocatalysts. Reactive species trapping, electrochemical measurements, KPFM, DFT calculations, and COMSOL simulations collectively confirm that Bi doping breaks local symmetry, introduces additional polarization components, redistributes charge density, and amplifies local piezoelectric potential at crack sites. This work provides a novel and effective doping strategy for simultaneously modulating polarization and electronic properties in ferroelectric perovskites, offering new insights into the design of high-performance piezo-photocatalysts for environmental remediation.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Yuhao Luo,Zhengdong Zhang,Shanhua Chen,Ao Jiang,Xingyu Chen,Xiaodong Zhu,Yuli Di
In this study, to enhance the peroxymonosulfate (PMS)-assisted photocatalytic degradation of Rhodamine B (RhB) under visible light over TiO 2 , a novel halloysite nanotube (HNTs) supported TiO 2 composite photocatalyst was prepared by the sol-gel method. The crystal structure and bonding information of samples were investigated by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV–visible diffuse reflection spectroscopy (DRS), photoluminescence (PL) and electrochemical impedance spectroscopy (EIS) were used to characterize the morphology, optical properties and energy band structure of the samples. The composite with weight ratio of 1:5 (HNTs/TiO 2 ) (named HT-20) exhibited apparently enhanced PMS-assisted photocatalytic RhB degradation efficiency and can degrade approximately 95.31 % of RhB in 30 min, and the first-order rate constants (k) of HT-20-PMS system is about 54.5 times higher than that of B–TiO 2 . In addition, the possible mechanism of enhanced PMS-assisted photocatalytic activity of HT-20 was proposed. The improvement of photocatalytic activity in the composite photocatalyst can be ascribed to the large surface area and strong adsorption capacity of HNTs.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 47
·21944-21959
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IF 3.3
Xuanlan Luo,Jinhai Yuan,Junhong Liu,Haikun Hu,Ziyi Yang,Xiaopeng Hou,Qi Sun,Di Xu
Ultrasonic assisted hydrothermal and calcination methods were used to prepare type II heterojunction ZnBi2O4/g-C3N4 (ZBN) photocatalysts. The crystal structures, elemental compositions, morphologies and optical properties of the prepared monomer and heterojunction photocatalysts were characterized. The photocatalytic degradation efficiency of acid red B reached 95% in 180 min under UV irradiation, which was 1.82 and 1.44 times higher than that of g-C3N4 and ZnBi2O4, respectively, and the reaction rate constants were increased from 0.004 min−1 and 0.005 min−1 to 0.015 min−1. ZBN exhibited high photocatalytic activity, and the enhancement of activity can be attributed to the construction of the type II heterostructure and reduced carrier recombination. The degradation experiments of carmine, AO7, MO, MB and RhB showed that the composite ZBN had a better degradation effect on different dyes. The results of radical trapping experiments and EPR tests showed that ˙O2− plays a crucial role in the photocatalytic degradation of acid red B. Finally, the mechanism of the photocatalytic degradation of acid red B by ZBN was investigated by combining EPR, VB-XPS and radical trapping experiments.
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