NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 15
·7070-7077
·
IF 3.925
Zheng Lu,Wenxian Wei,Jingjing Yang,Qin Xu,Xiao-Ya Hu
A novel Ag triangle nanoparticles/TiO2 nanorod array (AgNTs/TNA) heterostructure was designed as a surface-enhanced Raman scattering (SERS) active substrate for the sensitive detection of Rhodamine 6G (R6G), Crystal Violet (CV), Malachite Green (MG) and Thiram in food samples. The heterostructure was constructed by simply stacking AgNTs and hydrothermally prepared rutile TNA together. On the surface of the heterostructure, the intensity of the Raman scattering intensity was about two times stronger compared with that on the AgNT substrate, using the R6G molecule as a probe. The AgNTs/TNA heterostructure could detect the SERS signal of R6G down to 10−10 M, showing excellent SERS performance. This platform has been successfully applied for the detection of CV and MG residues in crayfish. When irradiated with ultraviolet light, the SERS substrates can be cleaned and reused. This work demonstrated that the AgNTs/TNA metal–semiconductor heterostructure with high sensitivity, reproducibility and recyclability could provide an alternative reliable platform for food additive analysis.
研究领域:
材料科学
·
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Qinggong Ren,Congcong Kong,Zhihui Chen,Jiading Zhou,Weimin Li,Dongyang Li,Zhijian Cui,Yinghao Xue,Yuhan Lu
An advanced oxidation method combining ultrasonic (US) and electrochemical (EC) for degrading malachite green wastewater in batches was discovered. The performance of the system can be judged by quantitatively measuring the degradation rate of malachite green under different electrode materials, electrolytes, voltages and powers. The results show that the highest degradation of malachite green was obtained, reaching up to 94.92%, when the voltage was 20 V, ultrasonic power was 300 W and electrolyte solution was 15.0 g/L Na 2 SO 4 under the condition that the ruthenium-iridium plated titanium electrode was used as the anode and graphite as the cathode. The ultrasonic electrochemical process conforms to the characteristics of pseudo-first-order reaction kinetics. Compared with other methods, ultrasonic electrochemical method is more cost-effective and environmentally friendly. Finally, the possible degradation process of malachite green is inferred, including oxidation and N-demethylation.
研究领域:
环境科学
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2018
·
IF 4.946
Nataliya A. Gavrilenko,Tatyana N. Volgina,Evgeniy V. Pugachev,Mikhail A. Gavrilenko
Polymethylmethacrylate matrix has been developed as an analytical device for visual and spectrophotometric determination of malachite green. Based on the studied effects of different pH levels, temperature, contact time and diverse ions, optimum analysis conditions have been established. For malachite green, the calibration graph was linear in the range of 0.5–30 mg·L −1 in the samples with the detection limit of 1 mg·kg −1 . The proposed simple method makes it possible to determine malachite green visually in the concentration range 8–30 mg·L −1 using a colour scale. The method has been implemented for determination of malachite green in various sea fish samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Xiaochuan Ma,Yaqiang Li,Peixia Yang,Jinqiu Zhang,Maozhong An
A novel suppressor, malachite green, was used to achieve bottom-up growth of cobalt in this work. Electrostatic potential, HOMO/LUMO of malachite green was calculated to provide an insight into the interaction between malachite green and metal substrate, while charge distribution, AIM (atoms in molecules theory) analysis and IRI (interaction region indicator) analysis were coupled to analyze the interaction between malachite green and cobalt ions. Adsorption-coordination inhibition mechanism was illustrated to explain the inhibition effect of malachite green. Electrochemical analysis was applied to evaluate malachite green. Cyclic voltammetry was used to confirm the inhibition effect of malachite green, while EQCM analysis demonstrates that the current efficiency was lowered by MG. The nucleation and growth of cobalt is 3D diffusion-controlled progressive nucleation growth under the influence of hydrogen evolution reaction and the compact cobalt coatings could be obtained by surface analysis. The effective MG concentration gradient could be formed within blind vias according to current transient analysis so as to develop electroplating rate difference. The bottom-up growth of cobalt within blind vias was achieved by carrying out electroplating test and the adsorption-transport mechanism was proposed to explain the superconformal electrodeposition of cobalt under the influence of MG.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-11
·
IF 3.998
Song Jinlong,Han Gang,Wang Yani,Jiang Xu,Zhao Dongxue,Li Miaomiao,Yang Zhen,Ma Qingyun,Parales Rebecca E.,Ruan Zhiyong,Mu Yingchun
Malachite green is a common environmental pollutant that poses a great threat to non-target organisms, including humans. This study reports the characterization of a bacterial strain, Pseudomonas veronii JW3-6, which was isolated from a malachite green enrichment culture. This strain degraded malachite green efficiently in a wide range of temperature and pH levels. Under optimal degradation conditions (32.4 °C, pH 7.1, and inoculum amount of 2.5 × 10 7 cfu/mL), P. veronii JW3-6 could degrade 93.5% of 50 mg/L malachite green within seven days. Five intermediate products from the degradation of malachite green were identified: leucomalachite green, 4-(dimethylamino) benzophenone, 4-dimethylaminophenol, benzaldehyde, and hydroquinone. We propose a possible degradation pathway based on these findings. The present study is the first to report the degradation of malachite green by P. veronii and the identification of hydroquinone as a metabolite in the degradation pathway.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 1
·892-897
·
IF 1.338
Tripathi Pranav K.,Gan Lihua,Liu Mingxian
In this work, we have synthesized high surface area and large pore volume carbon nanoparticles (CNP) by a simple and easy sol–gel approach. The sol was prepared by mixing Pluronic F127 and phloroglucinol-terephthalaldehyde in acidic ethanol solution and the gel was formed after
the vacuum removal of ethanol. In the sol–gel process, hydrophobic segments of Pluronic F127 forms enhanced hydrogen bonding with trihydroxyl groups of phloroglucinol. A polymeric network of carbon precursor was also prepared by making the interconnectivity between four phloroglucinol
and one terephthalaldehyde molecules. After thermal polymerization and carbonization of the gel, the CNP had a very high surface area (1441 m2 g−1) and large pore volume (1.7 cm3 g−1) with narrow micropore (1.0 nm) and mesopore (2.3 nm) diameters. The mesopore
was developed due to the enhanced hydrogen bonding between Pluronic F127 and phloroglucinol, while the micropores were generated due to hydrocarbon polymeric network of phloroglucinol-terephthalaldehyde. The CNP had a size about ca. 20 nm. The CNP were applied for the removal of the highly
hazardous water pollutant malachite green (MG) and achieved a very high adsorption capacity (1892 mg g−1). The commercials powder activated carbon (PAC) was also applied for the removal of MG and achieved an adsorption capacity of PAC was 1390 mg g−1. It believes
that shape and size of CNP and PAC played an important role in the adsorptive removal of MG.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Ze Chen,Zuyao Fu,Xiaoyu Du,Jing Xie,Zhaoyang Ding
Simple fluorescence aptasensors were established for malachite green (MG) and leucomalachite green (LMG) detection using G-quadruplex dyes thioflavin T (ThT) and thiazole orange (TO), respectively. ThT and TO, initially non-fluorescent in aqueous solution, exhibited fluorescence upon binding to target-specific aptamers, resulting in the stabilization of G-quadruplex structures. The specific binding between G-quadruplex and MG could induce conformational changes, which caused a pronounced quenching of fluorescence emitted by the intercalator, providing a possibility for detection. The developed assays demonstrated a good linear relationship in the range of 0–1000 μg L -1 for MG and 0–250 μg L -1 for LMG, with low limits of detection of 5.4 × 10 -3 μg L -1 and 0.1 μg L -1 respectively. More importantly, satisfactory detection results in water and fish samples were obtained. Noteworthy was that the uncomplicated fluorescent aptasensors operated effectively without the need for any modifications. The experimental process was facile and realized in homogeneous solution, which exhibited quick responsiveness after simple mixing.
研究领域:
生物化学
·
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CELLULAR PLASTICS
·
2014
·
IF 1.018
XX Li,J Li,XJ Sun,LY Cai,YC Li,X Tian,JR Li
A series of Polyurethane/Chitosan composite foam with different chitosan content of 5–25 wt% was prepared, and their adsorption performance of malachite green (MG) in aqueous solutions was investigated by pH values, contact time, temperatures and chitosan content. It was observed that Polyurethane/Chitosan composite foam exhibited well-developed open cell structures. Malachite green adsorption capacities of the composite foam increased with the increment of chitosan content in composite foam. Polyurethane/Chitosan composite foam with 20% chitosan content exhibited a maximum removal capacity of 16.67 mg/g and 95.60% MG removal efficiency. In addition, MG adsorption capacities of composite foam increased with pH value increase, 30℃ was the optimum temperature, which affects the adsorption process, and the adsorption maximum was attained within 12 hours. The result of SEM showed the prepared composite foam possess well-developed open cell structures. The MG adsorption kinetics and equilibrium isotherm of the composite foam were well described with the pseudo-second order kinetic model and Langmuir isotherm model, respectively. This work provided an attractive adsorbent for removing of the hazardous materials from water.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Wang Daifang,Shen Ligong,Liu Wenjun,Cao Xiao,Wang Qianwen
This article introduces a novel unlabeled surface-enhanced electrochemiluminescence (SEECL) sensor for malachite green (MG) detection. The SEECL sensor was prepared by modifying the Ru(bpy) 3 2+ doped gold-SiO 2 core–shell nanocomposites (Au@SiO 2 -Ru(bpy) 3 2+ ) on the gold electrode. Ru(bpy) 3 2+ of nanocomposites can not only emit electrochemiluminescence (ECL) with electrochemical reaction, but also induce the local surface plasmon resonance (LSPR) of gold core. That is beneficial to enhance the ECL signa of sensor. However, in the existence of MG, the luminescence of sensor would be quenched by the fluorescence resonance energy transfer (FRET) between MG and Ru(bpy) 3 2+ . In this paper, both fluorescence and ECL of the Au@SiO 2 -Ru(bpy) 3 2+ were investigated for MG detection. And the results show that the SEECL sensor has high sensitive to MG. Under the optimal experimental conditions, the minimum detection concentration could be achieved about 1.0 nM of MG, which fully meets the China national standard detection requirements of veterinary drug residue in seafood.
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Rong Wang,Liping Zhang,Shiying Zou,Hong Zhang
In this paper, novel Ag nanodendrites (Ag NDs) substrates were designed and fabricated on indium tin oxide (ITO) glass by using cyclic voltammetry electrodeposition. This method was simple, facile and controllable without any seed, template or surfactant. The influence of electrodeposition conditions on the microstructure and SERS-active of Ag NDs substrate were studied. Under the optimized conditions, the as-prepared Ag NDs exhibited superior SERS activity toward malachite green(MG) with high enhancement effect of 5.4 × 10 9 and low detection limit of 9.4 × 10 −13 M. Moreover, the Ag-NDs substrate shows extremely good uniformity and reproducibility with low relative standard deviation of 12.6% for substrate-to-substrate. In addition, a logarithmic correlation between MG concentration and Raman intensity was obtained, with the linearly dependent coefficient (R 2 ) of 0.984. The as-prepared Ag NDs substrates were successfully applied to the determination of MG in environmental water, with recoveries in the range of 87.8% to 109.6%. These results show high potential of the Ag NDs as effective SERS substrates for rapid detection of other trace-level contaminants in environment water.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Iranian Chemical Society
·
2024
·Vol. 21
·期 3
·877-885
·
IF 2.2
Liu Gang,Liu Lihui,Zhou Yuyi,Wang Ya,Sui Guoqi,Zhang Peng
In this study, Bi 2 O 3 nanoparticles are prepared via an impregnation method and modified using multi-walled carbon nanotubes (MWCNTs) and PW 12 . XRD reveals that the prepared Bi 2 O 3 corresponded to the monoclinic α -phase. SEM results reveal that the composite consists of a series of nanosheets with flower-like structures. In this study, malachite green (MG) is used as a simulated contaminant to test the degradation capability of the compound under sunlight, and the effect of PW 12 doping on the photocatalytic properties of the sample is investigated. The results show that the degradation kinetic constant of 0.3 PW 12 /MWCNTs/Bi 2 O 3 (0.8125 h −1 ) is about 3 times that of Bi 2 O 3 (0.2767 h −1 ). The ternary complex containing 30% PW 12 has a degradation rate of 95% in 2.5 h. h + and \(^\cdot {\text{O}}_2^-\) were the major active species in the photocatalytic degradation of MG.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2016
·
IF 2.687
Lu Li,Zheng-zhong Lin,Ai-hong Peng,Hui-ping Zhong,Xiao-mei Chen,Zhi-yong Huang
A direct competitive enzyme-linked immunosorbent assay (ELISA) method was used for the detection of malachite green (MG) with a high sensitivity and selectivity using magnetic molecularly imprinted polymers (MMIPs) as a bionic antibody. MMIPs were prepared through emulsion polymerization using Fe 3 O 4 nanoparticles as magnetic nuclei, MG as a template, methacrylic acid (MAA) as a functional monomer, ethylene glycol dimethacrylate (EGDMA) as a crosslinking agent and span-80/tween-80 as mixed emulsifiers. The MMIPs were characterized by scanning electron micrographs (SEM), thermal-gravimetric analyzer (TGA), Fourier transform infrared spectrometer (FT-IR) and vibrating sample magnetometer (VSM), respectively. A high magnetic saturation value of 54.1 emu g −1 was obtained, resulting in rapid magnetic separation of MMIPs with an external magnet. The IC 50 of the established ELISA method was 20.1 μg L −1 and the detection limit (based on IC 85 ) was 0.1 μg L −1 . The MMIPs exhibited high selective binding capacity for MG with cross-reactivities less than 3.9% for MG structural analogues. The MG spiking recoveries were 85.0%–106% with the relative standard deviations less than 4.7%. The results showed that the biomimetic ELISA method by using MMIPs as bionic antibody could be used to detect MG rapidly in fish samples with a high sensitivity and accuracy.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
DOI
高影响因子
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