APPLIED SURFACE SCIENCE
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2019
·
IF 5.155
Yangqing He,Zhengrui Huang,Zhanying Ma,Binghua Yao,Haiyang Liu,Linlin Hu,Qing Zhao,Qian Yang,Dongjie Liu,Deguo Du
In this study, zinc (II) 1, 8(11),15(18),22(25) - tetrakis (4-carboxylphenoxy) phthalocyanine (α-ZnTcPc) was synthesized as sensitizer to construct a novel photocatalyst α-ZnTcPc/g-C 3 N 4 by a polycondensation strategy. The FT-IR and XPS spectra demonstrated that the α-ZnTcPc molecules were covalently coupled on g-C 3 N 4 . The 10%α-ZnTcPc/g-C 3 N 4 composites exhibit excellent extended spectral response with intense broad near-infrared absorption at 695 nm and with significantly fascinated charge carrier separation. As expected, the 10%α-ZnTcPc/g-C 3 N 4 displayed a remarkable improved photocatalytic performance in decomposition of methylene blue (MB) and antibiotic tetracycline with degradation rates of 94.49% and 91.43% under visible light irradiation, respectively. The hydroxyl radicals (·OH) were observed as the main reactive oxidizing species in tetracycline decomposition. Moreover, the possible mechanism for enhanced visible light photocatalytic capability might be ascribed to the synergetic effect between α-ZnTcPc and g-C 3 N 4 , which creates large surface areas, decreases the recombination rate of photogenerated charge carries, as well as improves the visible light harvesting significantly. This work not only presents a practical method to conquer the drawback of pure g-C 3 N 4 , but also provides useful insights to construct other g-C 3 N 4 -based composites to take full advantage of solar light towards practical applications for eliminating recalcitrant organic pollutants.
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高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2018
·Vol. 31
·期 9
·575-584
·
IF 1.808
Shuting Huang,Huijie Li,Yixiang Wang,Xinghai Liu,Houbin Li,Zhan Zhan,Ling Jia,Lingyun Chen
Oxygen is crucial to food preservation and food spoilage. For the purpose of monitoring the integrity of modified atmosphere packaging (MAP) by nondestructive testing and controlling the reaction rate during recovery stage, we reported on a convenient and visual colorimetric oxygen indicator based on a graphene/titanium oxide composite, incorporating glycerol, methylene blue (MB), hydroxyethyl cellulose, and polyvinyl alcohol. The graphene/titanium oxide composite was synthesized from a modified Hummers synthesis of graphene oxide, followed by the hydro-thermal treatment with butyl titanate without using any reducing agent, then the morphology and structure characteristics were analysed by X-ray diffraction, Fourier transform infrared, Raman spectra, ultraviolet - visible spectroscopy, SEM, and TEM. Supported by the performance tests using ultraviolet - visible spectroscopy and CIElab, the indicator demonstrated the pseudo first-order kinetics of MB for MAP in detecting stage. The results confirmed that the prepared colorimetric indicator could actually detect the integrity of MAP without destruction. Additionally, the reaction time of indicator in recovery stage can be controlled by changing the concentration of MB because of pseudo first-order kinetics.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2017
·
IF 4.339
Guangfu Liao,Qing Li,Wenzhe Zhao,Qiuhu Pang,Haiyang Gao,Zushun Xu
A facile strategy has been developed for the preparation of novel silver/poly(styrene-N-isopropylacrylamide-methacrylic acid) (Ag/PSNM) nanocomposite spheres with high catalytic activity and good storage stability. Silver (Ag) nanoparticles are successfully deposited on poly(styrene-N-isopropylacrylamide-methacrylic acid) (PSNM) spheres surfaces via in situ reduction and simultaneously protected by polyvinylpyrrolidone (PVP). The prepared Ag/PSNM nanocomposite spheres show good temperature/pH responsive property and improved thermal property. Moreover, they also exhibit high catalytic activity and good recyclability for the catalytic reduction of methylene blue (MB) to leuco methylene blue (LMB). The result of clock reaction indicate that the redox reaction generates a colorless (LMB) solution which easily reverts back to blue (MB) in air. The catalytic activity increase with the increasing of temperature and the reaction rate constant (k) follows the typical Arrhenius-type dependence on temperature. In addition, the prepared Ag/PSNM nanocomposite spheres show good storage stability and the catalytic activity remains almost unchanged after storage for 90 days at room temperature. Therefore, the prepared Ag/PSNM nanocomposite spheres can have a highly potential use in the catalytic degradation of organic dyes in wastewater treatment applications.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 9
·1-14
·
IF 5.3
Deng Tingliu,Wu Wuming,Zhou Jingjing,Zeng Qin,Wang Heye,Deng Chunyan
A novel bacteriophage-targeted electrochemical biosensor designed for accurate and quantitative detection of live Salmonella in food samples is presented. The biosensor is simply constructed by electrostatic immobilizing bacteriophages on MXene-nanostructured electrodes. MXene, renowned for its high surface area, biocompatibility, and conductivity, serves as an ideal platform for bacteriophage immobilization. This allows for a high-density immobilization of bacteriophage particles, achieving approximately 71 pcs μm −2 . Remarkably, the bacteriophages immobilized MXene nanostructured electrodes still maintain their viability and functionality, ensuring their effectiveness in pathogen detection. Therefore, the proposed biosensor exhibited enhanced sensitivity with a low limit of detection (LOD) of 5 CFU mL −1 . Notably, the biosensor shows excellent specificity in the presence of other bacteria that commonly contaminate food and can distinguish live Salmonella from a mixed population. Furthermore, it is applicable in detecting live Salmonella in food samples, which highlights its potential in food safety monitoring. This biosensor offers simplicity, convenience, and suitability for resource-limited environments, making it a promising tool for on-site monitoring of foodborne pathogenic bacteria.
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PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 66
·61013-61020
·
IF 3.289
Jingxiang Yuan,Chaozhan Wang,Yinmao Wei
Environmental protection has become a very important issue. The transformation of solid waste into profitable products to remove hazardous chemicals from environmental samples has attracted much attention. In this study, inactivated immobilized enzymes were reutilized by converting into an adsorbent for the first time, and poly(sodium 4-styrene sulfonate) (poly(NASS)) was grafted from the surface of the particles using surface-initiated atom transfer radical polymerization (SI-ATRP) to produce a strong cation exchanger. X-ray photoelectron spectroscopy (XPS) confirmed the successful grafting of poly(NASS). The cation exchanger exhibited very good performance for the adsorption of methylene blue (MB) with a high capacity (409.8 mg g−1) and fast speed (equilibrium achieved within 1 min), the removal ratio was more than 96.4–99.2% when the MB concentration ranged from 10 to 800 mg L−1, and the removal efficiency of the cation exchanger for MB was 397.1 mg (g−1 min−1), these properties are much better than those previously reported materials. The cation exchanger can be used for five times with removal ratio higher than 80%. Additionally, the adsorption exhibited no significant pH and temperature dependence, and more than 80% capacity was maintained at high concentrations of sodium chloride up to 0.4 mol L−1, therefore the exchanger is very favorable for removal of MB from wastewater with different pH values and salt concentrations, and can be used in a wide temperature range.
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RSC Advances
·
2016
·Vol. 7
·期 1
·336-343
·
IF 3.289
Tao Chen,Yuhao Xiong,Yuemei Qin,Haiguan Yang,Peng Zhang,Fanggui Ye
In this study, a novel and low-cost method was developed for synthesizing magnetic porous γ-Fe2O3/C as an adsorbent and catalyst for removal of methylene blue (MB) from aqueous solution. Using FeCl3·6H2O and bagasse as the precursor, the biomass-based material was synthesized rapidly using a microwave heating process. Fe ions were introduced to achieve both adsorption and catalytic degradation by the Fenton reaction. Characterization by BET, XRD, SEM, and TEM indicated that the prepared γ-Fe2O3/C material exhibited homogeneous mesoporosity with a BET surface area, mesoporous volume, and saturation magnetization of 764.116 m2 g−1, 0.54 cm3 g−1, and 17.1 emu g−1, respectively. The material exhibited excellent adsorption and catalytic degradation abilities for removal of MB from aqueous solution (up to 352.96 mg g−1), with complete degradation of MB within 30 min. Moreover, γ-Fe2O3/C had good stability over 5 cycles. Therefore, this biomass-based γ-Fe2O3/C material can be used as a highly effective and low-cost adsorbent and catalyst and has great potential application in clean-up processes for environmental pollutants.
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ANALYST
·
2013
·Vol. 138
·期 7
·2051-2056
·
IF 3.969
Qian Han,Yonghua Wang,Yihan Huang,Liju Guo,Yingzi Fu
A chiral interface has been designed for specific recognition of carboxylic acids using multilayer architectures of β-cyclodextrin (β-CD) and methylene blue/reduce-graphene (MB@rGO) on glassy carbon electrodes. The advantages of β-CD as a chiral selector and MB@rGO composite as an electrochemical indicator were perfectly presented in this novel interface. It displayed good redox signal for sensing chiral target with high sensitivity and conductivity. Enormous signal differences were obtained after adsorption of target L isomer, due to strong blocking of the electron transfer process of methylene blue. Meanwhile mandelic acid was found to be the best chiral guest and obtained more effective chiral recognition.
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高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Shuhuai Li,Guihao Yin,Xuejin Wu,Chunhua Liu,Jinhui Luo
A novel supramolecular imprinted electrochemical sensor was developed for carbofuran (CBF) determination based on a multiwalled carbon nanotube-supported Pd-Ir nanocomposite catalyst (MWCNT/Pd-Ir) with methylene blue (MB) signal amplification. First, MWCNT/Pd-Ir composite nanoparticles were synthesized and used to modify the surface of a glassy carbon electrode; then, a molecular imprinted polymer for CBF was prepared by electropolymerization , with MB-doped o -phenylenediamine as the functional monomer and a 4-tert-butylcalix[8]arene-CBF (4TB[8]A-CBF) supramolecular complex as the template. The electrical signals were controlled though the elution and re-adsorption of CBF. Due to the double catalysis by the MWCNT/Pd-Ir and MB, the current intensity for CBF was obviously amplified. Additionally, because of the double recognition by the 4TB[8]A and MIP, the sensors showed outstanding CBF identification properties. The method was applied to detect CBF in agricultural products, and the satisfactory results were obtained.
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高影响因子
Materials
·
2024
·Vol. 17
·期 11
·2615
·
IF 3.1
Naveed Karim,Tin Kyawoo,Chao Jiang,Saeed Ahmed,Weiliang Tian,Huiyu Li,Yongjun Feng
The continuous discharge of organic dyes into freshwater resources poses a long-term hazard to aquatic life. The advanced oxidation Fenton process is a combo of adsorption and degradation of pollutants to detoxify toxic effluents, such as anti-bacterial drugs, antibiotics, and organic dyes. In this work, an activated attapulgite clay-loaded iron-oxide (A-ATP@Fe3O4) was produced using a two-step reaction, in which attapulgite serves as an enrichment matrix and Fe3O4functions as the active degrading component. The maximum adsorption capacity (qt) was determined by assessing the effect of temperature, pH H2O2, and adsorbent. The results showed that the A-ATP@Fe3O4achieves the highest removal rate of 99.6% under optimum conditions: 40 °C, pH = 3, H2O225 mM, and 0.1 g dosage of the composite. The dye removal procedure achieved adsorption and degradation equilibrium in 120 and 30 min, respectively, by following the same processes as the advanced oxidation approach. Catalytic activity, kinetics, and specified surface characteristics suggest that A-ATP@Fe3O4is one of the most promising candidates for advanced oxidation-enrooted removal of organic dyes.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Tianyi Cui,Yuan Zhang,Mingxia Tian,Yumin Yan,Guyu Zhang,Tao Zhang,Jianbo Zhao,Jianhui Jiang
In this study, agricultural waste cotton stalk was used as biomass carbon source, calcined with TiO 2 at a high temperature, deposited in a TiO 2 lattice, and used as an electron acceptor to inhibit photogenerated electron recombination. Subsequently, it underwent secondary calcination with g-C 3 N 4 to form a C-TiO 2 /g-C 3 N 4 composite catalyst. Experimental results showed that the coupling of carbon-doped TiO 2 and g-C 3 N 4 accelerated photogenerated electron–hole pairs pair migration, effectively inhibited the recombination of photogenerated carriers, and thus improved the removal efficiency of methylene blue (MB) and tetracycline hydrochloride (TC). Upon irradiation with a 500 W xenon lamp, the degradation rates of MB and TC achieved were 92.6 % and 95.3 % in 90 min, respectively.
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高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Yanjia Guo,Juan Lu,Wenzhuo Wang,Hanyue Jiang,Guangping Ma,Pengfei Han,Li Tian
This study presents the first synthesis of biomass carbon quantum dots (CQDs) with exceptional luminescent properties derived from discarded cantaloupe peels. Furthermore, these CQDs were utilized as luminescent reagents in conjunction with molecular imprinting technology to develop a molecularly imprinted electrochemiluminescence (ECL) sensor for the sensitive determination of methylene blue (MB). The sensor significantly enhances its sensitivity through two pathways: first, by loading CQDs onto Ti 3 CN to increase the amount of luminescent reagents on the electrode surface; second, by employing the electron-conducting polymer PM6 to load Au NPs, which facilitates electron transfer within the system. Moreover, the introduction of molecularly imprinted polymers (MIPs) enables the specific recognition of MB. Under optimal conditions, this sensor demonstrates a linear response to MB concentrations ranging from 5.0 × 10 −12 to 5.0 × 10 −7 M, with a detection limit as low as 1.67 × 10 −12 M (S/N = 3), showcasing remarkable advantages in stability, sensitivity, and reproducibility. It has been successfully applied for the detection of MB in actual fish samples. This work not only provides a green pathway for the reutilization of discarded fruit peels but also offers a novel method for the sensitive and specific detection of trace contaminants in food safety.
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高影响因子
CATALYSIS TODAY
·
2015
·
IF 3.893
Yanjie Wang,Yanjie Zhang,Fuhai Yu,Changzi Jin,Xin Liu,Jingyuan Ma,Yu Wang,Yuying Huang,Junhu Wang
Rutile Sn-Fe-TiO 2 photocatalysts with high visible-light-driven activity were synthesized by an improved soft chemical solution process for investigating the potential correlation between their photocatalytic performance and coordination structure. The prepared photocatalysts were systematically characterized by XRD, BET, Raman, TEM, UV–vis, XPS, XAFS and Mössbauer techniques. Their photocatalytic performances were evaluated by degrading the model pollutant of methylene blue aqueous solution under visible light irradiation ( λ ≥ 400 nm). The results indicated that tin and iron ions could substitute Ti 4+ in the rutile TiO 2 lattice, and specially, iron ions were located at tetrahedrally coordinated titanium sites. Their visible-light-driven photocatalytic activities were found to culminate at a very low level of iron doping (Fe/Ti = ∼0.1 at.%, Sn/Ti = 2.0 at.%), this was 5-fold of P25 and 2-fold of undoped rutile TiO 2 . It was confirmed that besides the high surface area, fine crystallinity, enhanced visible light absorption and optimized oxygen vacancy concentration, the mole ratio of tetrahedrally coordinated iron and titanium was also essential to modify their visible-light-driven photocatalytic properties.
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