INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 13
·10594
·
IF 5.6
Zanlin Chen,Haiming Li,Miaojia Xie,Fengguang Zhao,Shuangyan Han
This study proposes a label-free aptamer biosensor for the sensitive detection of malachite green(MG) using gold nanoparticles/multi-walled carbon nanotubes @ titanium dioxide(AuNPs/MWCNTs@TiO2). The nanocomposite provides a large surface area and good electrical conductivity, improving current transfer and acting as a platform for aptamer immobilization. The aptamer and the complementary chain(cDNA) are paired by base complementary to form the recognition element and fixed on the AuNPs by sulfhydryl group, which was modified on the cDNA. Since DNA is negatively charged, the redox probe in the electrolyte is less exposed to the electrode surface under the repulsion of the negative charge, resulting in a low-electrical signal level. When MG is present, the aptamer is detached from the cDNA and binds to MG, the DNA on the electrode surface is reduced, and the rejection of the redox probe is weakened, which leads to an enhanced electrical signal and enables the detection of MG concentration by measuring the change in the electrical signal. Under the best experimental conditions, the sensor demonstrates a good linear relationship for the detection of MG from 0.01 to 1000 ng/mL, the limit of detection (LOD)is 8.68 pg/mL. This sensor is stable, specific, and reproducible, allowing for the detection of various small-molecule pollutants by changing the aptamer, providing an effective method for detecting small-molecule pollutants.Keywords:aptamer;cyclic voltammetry;potassium hexacyanoferrate;sensitive detection;differential pulse voltammetry
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PubMed
高影响因子
Food Analytical Methods
·
2018
·Vol. 11
·期 6
·1668-1676
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IF 2.245
Jia Jie,Yan Shang,Lai Xiaoxia,Xu Yongzhen,Liu Tong,Xiang Yuhong
A facile colorimetric aptasensor based on unmodified gold nanoparticles (AuNPs) for rapid, highly sensitive and selective detection of malachite green (MG), one of triphenylmethane dyes and antibiotics, was successfully developed. Malachite green RNA aptamer having the binding ability with high affinity and specificity would be the ideal recognition receptor for MG. RNA aptamer can adsorb on the AuNPs and protect AuNPs against salt-induced aggregation. When malachite green were added in a solution, aggregation of AuNPs was specifically induced by desorption of aptamer from the surface of gold nanoparticles as the formation of aptamer-target complex. Therefore, the salt could trigger AuNP aggregate and the solution color changed from red to blue. The solution colors and absorbance were related with the concentrations of MG, and a well linear relationship in the wide range was obtained. The detection limit of MG was down to 15.95 nM. This colorimetric method was better than other traditional methods in terms of its reduced detection time, simple signal generation, high selectivity, lower detection limit, and observation with the naked eye. The proposed one-step, label-free method was successfully used to determine MG in actual fish samples. The high recoveries of MG in fish sample detection were satisfied.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Huandong Liu,Zunli Mo,Li Li,Fang Chen,Qijun Wu,Lei Qi
The magnetic magnesium silicate composite (Fe3O4@MgSi) with efficient removal of Cu(II) and malachite green (MG) from aqueous solution were synthesized by hydrothermal approach. The synthetic flower-like particle size was about 2–3 μm. In the process of exploring the adsorption conditions, the isotherms were found to be well-fitted by Langmuir, Freundlich, and isotherm kinetics in accord with the pseudo-second-order model. In addition, the maximum adsorption capacity was 2198 mg·g–1 when the Cu(II) concentration of 800 mg·L–1. These results indicated that Fe3O4@MgSi can be used as a superadsorbent and recyclable adsorbent to effectively and rapidly remove Cu(II) and MG pollutants from industrial wastewater or drinking water.
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RSC Advances
·
2017
·Vol. 7
·期 62
·38965-38972
·
IF 3.108
Xin Jiang,Sidun Wang,Lan Ge,Fengcai Lin,Qilin Lu,Ting Wang,Biao Huang,Beili Lu
Organic–inorganic hybrid adsorbents based on sepiolite and cellulose were prepared through an easy-to-handle procedure. Hydrogen-bonding existed between the silanol groups (Si–OH) on the sepiolite surface and the hydroxyl groups of the cellulose structure resulting in the formation of hybrid beads with good synergistic effects. Incorporation of the inorganic molecule sepiolite into the renewable polymer cellulose opened an opportunity for the development of alternative environment-friendly adsorbents with improved adsorption efficiency as well as enhanced thermal stability compared with neat cellulose beads. The utility of the obtained sepiolite/cellulose beads was demonstrated by investigating their performance for the removal of malachite green (MG). The maximum adsorption capacity of MG on sepiolite/cellulose beads was close to the calculated results from the Langmuir adsorption isotherm, and the adsorption kinetics followed well to the pseudo-second-order model.
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2017
·Vol. 82
·期 2
·424-431
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IF 1.575
Zhang Jing,Liu Mao,Liu Zhijie,Yang Tao,He Qiulai,Yang Kai,Wang Hongyu
Abstract This paper presents the synthesis of a novel core–shell covalently functionalized Fe 3 O 4 coated SiO 2 decorated graphene oxides (Fe 3 O 4 @SiO 2 –GO) adsorbent. The prepared Fe 3 O 4 @SiO 2 –GO was characterized by fourier transform infrared spectrum, X-ray diffraction(XRD), X-ray photoelectron spectroscopy (XPS), and magnetic measurements. And the adsorption properties of the Fe 3 O 4 @SiO 2 –GO toward malachite green were systematically investigated. Various factors possibly affecting the adsorption behavior (initial concentration, contact time, and adsorbent dosage) were also studied in detail. The adsorption capacity (q m ) of Fe 3 O 4 @SiO 2 –GO for malachite green was found to be 265.87 mg/g with best fit to Langmuir isotherm ( R
2 = 0.968), and the adsorption mechanism follows the pseudo-second-order model ( R
2 = 0.981). The results indicate that the Fe 3 O 4 @SiO 2 –GO adsorbent, which is easily separated via an external magnetic field, is a potential low-cost effective material for malachite green removal from contaminated water. Graphical Abstract
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高影响因子
TALANTA
·
2015
·
IF 3.545
Baomei Huang,Xibin Zhou,Jing Chen,Guofan Wu,Xiaoquan Lu
A novel procedure for selective extraction of malachite green (MG) from fish samples was set up by using magnetic molecularly imprinted polymers (MMIP) as the solid phase extraction material followed by electrochemiluminescence (ECL) determination. MMIP was prepared by using Fe 3 O 4 magnetite as magnetic component, MG as template molecule, methacrylic acid (MAA) as functional monomer and ethylene glycol dimethacrylate (EGDMA) as crosslinking agent. MMIP was characterized by SEM, TEM, FT-IR, VSM and XRD. Leucomalachite green (LMG) was oxidized in situ to MG by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ). And then MMIP was successfully used to selectively enrich MG from fish samples. Adsorbed MG was desorbed and determined by ECL. Under the optimal conditions, calibration curve was good linear in the range of 0.29–290 μg/kg and the limit of detection (LOD) was 7.3 ng/kg ( S / N =3). The recoveries of MMIP extraction were 77.1–101.2%. In addition, MMIP could be regenerated. To the best of our knowledge, MMIP coupling with ECL quenching of Ru(bpy) 3 2+ /TPA for the determination of MG has not yet been developed.
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高影响因子
CURRENT MICROBIOLOGY
·
2025
·Vol. 82
·期 5
·1-12
·
IF 2.6
Xie Chengjia,Shi Guangjian,Gao Qing,Zhang Yujie,Fan Siyu,Xu Xian
Malachite green (MG) is a toxic triphenylmethane dye widely used in industry, as well as a controversial antimicrobial in aquaculture, leading to environmental concerns. In this study, the conditions for the decolorization of MG by Deinococcus wulumuqiensis R12 were optimized. Under the optimized conditions, a degradation efficiency of 99.30% was achieved for 200 mg/L MG within 30 min, with an initial biomass concentration of 5.5 g/L at 32 °C and pH 5.0. When the initial concentration of MG was increased to 1 g/L, the degradation efficiency surpassed 97% after 2.5 h. Analytical techniques, including UV–VIS, FTIR, GC–MS, and LC–MS analyses revealed that the degradation products included desmethyl-malachite green, di-desmethyl-malachite green, 4-(dimethylamino)benzophenone, and 4-(methylamino)benzophenone, indicating that the MG degradation mechanism of R12 was based on oxidation and demethylation processes. Furthermore, microbial assays confirmed that the byproducts of MG degradation by R12 are much less toxic than the parent compound, indicating the potential of Deinococcus wulumuqiensis R12 as an effective bioremediation agent for MG-contaminated environments.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Boxuan Peng,Siyuan Yu,Jiahui Li,Jinfeng Xing
Green and efficient preparation of hydrogel beads remains a great challenge. In this study, the hydrogel beads (AGSP) were directly prepared within 10 s from drop-out to drop-down of the droplets in paraffin oil under green LED irradiation using sodium acrylate and acrylamide as the functional monomers, methacrylated carboxymethyl chitosan (CMCSG) as a crosslinker based on carboxymethyl chitosan and poly(ethylene glycol) as porogen. Molar ratios of monomers were modified to optimize the adsorption of hydrogel beads, and the optimal adsorption capacity for malachite green (MG) was 503.33 mg·g −1 . Scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and fourier transform infrared (FTIR) spectroscopy were used to determine the structural characteristics of the hydrogel beads. The removal of MG by AGSP was investigated and the adsorption kinetics and isotherms were calculated to understand the adsorption mechanism. Our research provides a green and efficient technique for preparing hydrogel beads for dye removal.
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DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Zheng Guo,Hekai Zhang,Yunfei Song,Minghuan Wang,Jiying Wang,Qing Miao,Peng Wei,Li Yin
The development of efficient adsorbents for removing toxic organic dyes from wastewater remains a critical challenge in environmental remediation. Herein, novel carbon nanofibers (CNFs) supported ZIF-8 hybrid composite (CNFs@ZIF-8) was synthesized via an in-situ growth method and evaluated for its malachite green (MG) adsorption performance. The composite exhibited a porous structure with a high specific surface area (1154.18 m 2 /g) and abundant functional groups, enabling exceptional adsorption capacity (2384.13 mg/g). Systematic studies revealed that the adsorption mechanism involved synergistic electrostatic interactions, π-π stacking, with the process fitting the Langmuir isotherm and pseudo-second-order kinetic models. Remarkably, CNFs@ZIF-8 demonstrated pH-responsive selectivity toward cationic dyes, achieving removal efficiencies of >90 % for MG, methylene blue (MB), and rhodamine B (RhB), while showing minimal affinity for anionic methyl orange (MO). Thermodynamic analysis confirmed the spontaneous (ΔG 0 < 0) and endothermic (ΔH 0 = 71.49 kJ/mol) nature of adsorption. The composite maintained structural stability over five regeneration cycles, highlighting its potential for sustainable wastewater treatment. This work provides a strategy to overcome the limitations of pure MOFs by integrating carbon substrates, offering a multifunctional adsorbent with scalable applications in addressing complex dye-polluted effluents.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yiting Chen,Dechun Fan,Lu Huang,Yanxia Li,Zhenli Qiu,Chen Feng
The malachite green (MG) has been widely used in the aquaculture and textile industry as drugs and dyes, respectively. In recent years, it has been found that MG has side effects such as carcinogenicity, teratogenicity and mutagenesis. So it becomes particularly important to degrade MG for these industries. In this paper, a set of equipment using FTO conductive glass was developed for degradation of MG. Several factors affecting the efficiency of electrochemical degradation, including the solution of pH, electrolyte, applied current density and degradation time were investigated. Based on the results of single-factor experiment, the response surface methodology (RSM) was used for optimal conditions. The degradation rate of MG reaches above 98% by electrolysis in 6.56 g/L NaCl (pH 8.84) solution with current density as 8.61 mA/cm 2 for 20 min. The degradation process was preliminarily investigated by ultraviolet-visible(UV-vis) spectroscopy, fluorescence spectrometry, and total organic carbon analysis. The equipment and operation is simple, therefore could be used for the degradation of wastewater yielded during production.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Da Lv,Jianfeng Zhang,Ziyan Luo,Zhongde Dai,Bo Tang
Malachite green (MG) is a significant water pollutant due to its widespread use and harmful properties, making its effective removal crucial. Graphene oxide (GO) has emerged as a promising material for dye adsorption. Doping GO into cellulose aerogels enhances mechanical properties and prevents GO dissolution. Many reports claim the advantages of GO in adsorption, but challenges remain in understanding and optimizing the adsorption of MG in three-dimensional cellulosic GO (CLGO) aerogels. In this study, three-dimensional CLGO aerogels were prepared using the freeze-drying method. They achieved an MG maximum adsorption capacity of 33.98 mg g −1 , and the adsorbent still had 97.04 % adsorption capacity at the seventh adsorption–desorption cycle. The photothermal properties of the CLGO aerogels were also studied, contributing to the development of the zero-liquid discharge (ZLD) post-processing concept. Molecular force field simulations indicated that π-π interaction is the primary force between MG and CLGO aerogels in the absorption process. We believe our research will guide the future optimization of MG specialized absorbent.
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MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Li Zhao,Wei Lv,Juying Hou,Yijing Li,Junling Duan,Shiyun Ai
We synthesized magnetically recyclable g-C 3 N 4 /Fe 3 O 4 /ZIF-8 nanocomposites as an emerging adsorbent for the malachite green (MG) removal in aqueous solution. Bath absorption experiments for MG were done to explore the influence (pH, adsorbent dosage and initial concentration) on its absorption process. The adsorption isotherm and kinetics followed Langmuir model and pseudo-second-order kinetic model, respectively. The thermodynamic datas (ΔG ○ < 0, ΔH ○ > 0, ΔS ○ > 0) showed that the adsorption process for MG was feasible, endothermic and spontaneous. The g-C 3 N 4 /Fe 3 O 4 /ZIF-8 nanocomposites showed excellent removal properties for MG. The maximum equilibrium adsorption capacity could reach as high as 3412 mg/g. The g-C 3 N 4 /Fe 3 O 4 /ZIF-8 nanocomposites could be easily separated using an external magnet, and the nanocomposites could be repeatedly utilized after five cycles. The ultra-high adsorption capacity, easy separation, and excellent recyclability enabled the obtained g-C 3 N 4 /Fe 3 O 4 /ZIF-8 nanocomposites a good adsorbent for the adsorption of MG.
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