MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 2
·1-8
·
IF 5.3
Zhang Luyang,Chen Huan,Ma Shanshan,Fan Wu,Chen Sheng,Yu Ajuan,Yuan Hang,Ouyang Gangfeng,Zhang Yanhao,Zhao Wuduo
A novel microfluidic approach is presented for the one-step synthesis of gold nanoparticle-doped microspherical photonic crystal (AuNP–MPC) for ultrasensitive surface-enhanced Raman spectroscopy (SERS) detection of methylene blue (MB), a common environmental pollutant. The AuNP–MPC microspheres exhibited excellent SERS activity due to the surface plasmon resonance of Au nanoparticles. And the SERS signal was significantly enhanced by strategically manipulating the photonic band gap (PBG) of the AuNP–MPC microspheres to achieve optimal overlap with the excitation laser wavelength. The SERS signal of MB was significantly enhanced by this, reaching an EF as high as 3.03 × 10 6 . The AuNP–MPC microspheres demonstrated rapid adsorption of MB within just 5 min, making them suitable for rapid detection applications. Notably, the limit of quantification was as low as 1 × 10 −8 mol/L, highlighting the exceptional sensitivity of this approach. Furthermore, the AuNP–MPC microspheres exhibited excellent homogeneity, reproducibility, and stability of SERS signals, which are crucial qualities for practical SERS applications. This work presents a promising avenue for developing SERS-active microfluidic platforms for the rapid detection of trace organic pollutants in environmental monitoring. Graphical
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Meng Zhang,Haohao Hou,Hongfu Zhou,Aimin Xiang,Yafeng Deng
Faced with extensive water pollution caused by dyes and heavy metals, it is imperative to create cost-effective adsorbents that can effectively eliminate residual pollutants in wastewater. The synthesis of polyvinyl alcohol/xanthan gum (PVA/XG) hydrogels involved a combination of freeze-thaw cycling technique and the adsorption characteristics and mechanisms of methylene blue (MB) and heavy metal ions Pb 2+ were investigated. In comparison to pure PVA hydrogels, the swelling behavior of PVA/XG3 hydrogel exhibited a 185 % increase in swelling rate. The adsorption test results suggested that PVA/XG3 hydrogel was effective in absorbing MB (27.39 mg/g) and Pb 2+ (17.07 mg/g) from a 50 mg/L pollutant solution. The adsorption process of MB and Pb 2+ by PVA/XG3 hydrogel followed Langmuir adsorption isotherm and the QFO models, indicating a preference for homogeneous physical adsorption. Specifically, the Langmuir isothermal model predicted that the q max of MB and Pb 2+ by PVA/XG3 hydrogel were 94.47 and 58.50 mg/g, respectively. Therefore, this essay has created a cost-effective and environmentally friendly method for producing versatile PVA/XG hydrogels specifically intended for water treatment purposes.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Yuyang Liu,Wei Jin,Yaping Zhao,Guangshan Zhang,Wen Zhang
Novel hybrid nanostructures or nanocomposites are receiving increasing attention due to their newly evolved properties. In this work, α-Fe 2 O 3 anchored to graphene oxide (GO) nanosheet (α-Fe 2 O 3 @GO) was synthesized through a facile hydrolysis process and its photo-catalytic performances and durability in heterogeneous Fenton system were fully evaluated. The decolorization rates of methylene blue in α-Fe 2 O 3 @GO + H 2 O 2 + UV system within a wide pH range were approximately 2.9-fold that of classical Degussa P25 TiO 2 + UV and 2.4-fold that of α-Fe 2 O 3 + H 2 O 2 + UV. This enhanced decolorization of methylene blue (MB) in α-Fe 2 O 3 @GO + H 2 O 2 + UV system were attributed to the unique incorporation of GO into the catalyst which not only mediated the morphology of active sites α-Fe 2 O 3 nanoparticles but also offered high electron conductivity and electrostatic attraction between negatively charged GO with positively charged MB. High efficiencies of degradation were achieved on various surface charged organic pollutants (around 96–100%), such as cationic compounds of MB and rhodamine B (RhB), anionic compound Orange II (OII) and Orange G (OG), neutral compounds of phenol , 2-nitrophenol (2-NP) and endocrine disrupting compound 17β-estradiol (E2). The dominant reactive oxygen species (ROS) responsible for decolorization, such as hydroxyl radicals ( OH) and superoxide anion radicals (O 2 − ) generated by activation of H 2 O 2 on the surface of α-Fe 2 O 3 @GO were detected and quantified by free radical quenching methods. The possible degradation mechanism of MB involved the rupture of phenothiazine ring by desulfurization and the rupture of phenyl ring due to the attack of ROS, which was analyzed by LC/MS/MS. The reduction of MB and its intermediates was consistent with the decreasing trend of the acute toxicity towards luminous bacteria with the increasing irradiation time. The results lay a foundation for highly effective and durable photo-Fenton technologies for organic wastewater within wider pH ranges than the conventional photo-Fenton reaction.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 15
·3700
·
IF 4.2
Yaliang Huang,Jiaqiang Wang,Yirui Xu,Jiwen Zhang,Ning Xia
In this work, we report on an electrochemical method for the signal-on detection of caspase-3 and the evaluation of apoptosis based on the biotinylation reaction and the signal amplification of methylene blue (MB)-loaded metal–organic frameworks (MOFs). Zr-based UiO-66-NH2MOFs were used as the nanocarriers to load electroactive MB molecules. Recombinant hexahistidine (His6)-tagged streptavidin (rSA) was attached to the MOFs through the coordination interaction between the His6tag in rSA and the metal ions on the surface of the MOFs. The acetylated peptide substrate Ac-GDEVDGGGPPPPC was immobilized on the gold electrode. In the presence of caspase-3, the peptide was specifically cleaved, leading to the release of the Ac-GDEVD sequence. A N-terminal amine group was generated and then biotinylated in the presence of biotin-NHS. Based on the strong interaction between rSA and biotin, rSA@MOF@MB was captured by the biotinylated peptide-modified electrode, producing a significantly amplified electrochemical signal. Caspase-3 was sensitively determined with a linear range from 0.1 to 25 pg/mL and a limit of detection down to 0.04 pg/mL. Further, the active caspase-3 in apoptosis inducer-treated HeLa cells was further quantified by this method. The proposed signal-on biosensor is compatible with the complex biological samples and shows great potential for apoptosis-related diagnosis and the screening of caspase-targeting drugs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Tingting Li,Xiaohui Yang,Jiaojiao Qiao,Yang Liu,Ting Zhang
In order to improve the adsorption capacity of attapulgite, a novel composite adsorbent EDTA/CS-ATP was synthesized by integrating attapulgite (ATP), chitosan (CS), and ethylenediaminetetraacetic acid (EDTA) by hydrothermal carbonization and grafting method. Under optimized conditions, the composite adsorbent achieved a removal ratio of 92.46 % and an adsorption capacity of 66.31 mg/g for methylene blue (MB) removal. Characterizations revealed that introducing CS and EDTA to ATP enhanced the electrostatic and hydrophobic interactions of ATP, which is beneficial for MB adsorption. Kinetic and thermodynamics studies showed that the adsorption followed pseudo-second-order kinetics and the Langmuir model, indicating a chemisorption-driven monolayer binding mechanism. Hydrogen bonding, electrostatic attraction, and π-π interactions were identified as the key mechanisms contributing to MB capture. Notably, compared to traditional EDTA-based materials mainly used for heavy metal removal, the EDTA/CS-ATP composite has the multifunctional sites to match the cationic and aromatic structure of MB, exhibiting highly selective and efficient MB removal. This work presents an environmentally friendly and scalable strategy for treating wastewater contaminated with cationic dyes, offering a promising solution for practical applications in water purification.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Lan Yang,Qiyuan Lu,Xiao Zhou,Tao Yang,Chunfang Du
Adsorption is an effective strategy for treating water pollution and natural clay minerals-based materials display the great potential for removing pollutants from wastewater. In this paper, halloysite nanotubes (HNTs) modified with ethylenediaminetetraacetic acid (EDTA) were thermally treated to serve as supports for loading SnS2 to construct SnS2/HNTs(C) (SHCx-y). Methylene blue (MB) was selected as a target pollutant to examine the removal efficiency of the obtained adsorbents. SHC0.04-500 could remove more than 90 % of MB (50 mg∙L-1) within 18 min, which was 9 and 18 times higher than those of SnS2 and HNTs(C)-500, respectively. Moreover, the adsorbent SHC0.04-500 with good pH and temperature adaptability displayed the excellent adsorption performance toward cationic dyes and various antibiotics. The adsorption process of MB over SHC0.04-500 matched well with the Langmuir isotherm and pseudo-first-order kinetic model. The adsorption mechanism investigation suggested that the carbon layer on HNTs made the surface of SHC0.04-500 more negative, which mostly contributed to the improved adsorption performance. This work provides a low-cost, environmental-friendly, and efficient adsorbent for removing pollutants from wastewater, and contributes a new strategy to enhance the removal efficiency by a simple modification method.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Chenguang Wang,Yajing Wang,Qunying Yang,Taiping Xie,Zhongping Yao,Qixing Xia,Jiankang Wang
The unsatisfactory degradation, significant iron leaching and poor recyclability of Fe-based sulfide catalysts for peroxymonosulfate (PMS) activation greatly hinder their wide application. Despite the progress by constructing Fe-based sulfide/carbon composites, the degradation performance is still unsatisfactory and the synergistic mechanism of Fe sites and nitrogen configurations in PMS activation is ambiguous. Herein, using dopamine as C and N source, the magnetic FeS 2 embedded in N doped carbon (FeS 2 @NC) catalyst was prepared by hydrothermal-pyrolytic sulfidation method. The as-synthesized catalyst was systematically characterized by XRD, SEM, TEM, Raman, XPS and BET. The methylene blue (MB) degradation experiment in catalyst/PMS system showed FeS 2 @NC4-500 prepared under 0.4 g sulfur powder and pyrolysis temperature of 500 °C exhibited excellent performance with 94 % MB removal rate within 30 min. The optimal degradation condition was determined to be 0.2 g/L catalyst, 0.3 g/L PMS, 20 mg/L MB and initial pH 7.0. The scavenging experiment of reactive oxygen species (ROS), electron paramagnetic resonance (EPR) and electrochemical measurement confirmed the involvement of sulfate radical (SO 4 · – ), superoxide radical (O 2 · – ) and singlet oxygen ( 1 O 2 ) in MB degradation, but SO 4 · – and 1 O 2 were the major contributors. Combined with the XPS spectra of the fresh and used FeS 2 @NC4-500, the synergistic mechanism with Fe(Ⅱ) and pyrrolic N as active sites for PMS activation was clarified. The degradation intermediates were identified by liquid chromatograph-mass spectrometer (LC-MS) and the possible degradation pathway of MB in FeS 2 @NC4-500/PMS system was proposed. The ecotoxicity of the intermediates was predicted by using the ECOSAR software. This work deciphers the important role of Fe(Ⅱ) and pyrrolic N in PMS activation and can provide a reference for designing highly efficient Fe-based sulfide/N doped carbon hybrid for persistent wastewater remediation.
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2025
·
IF 4.5
Jifan Zhao,Xiaorui He,Linghui Tang,Yue Wang,Shaoyan Wang
In this study, we report a flexible and highly sensitive glucose sensor (CNTYs-MB/GOx) for the first time based on methylene blue (MB) and glucose oxidase (GOx) co-electrodeposited onto carbon nanotube yarns (CNTYs). Unlike conventional MB/GOx coatings on planar carbon electrodes, the three-dimensional CNTY network provides a large electroactive surface area and efficient electron transport pathways, enabling dense and uniform immobilization of the MB/GOx complex. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR) confirmed the effective capture and stabilization of GOx by MB and its homogeneous distribution on the CNTYs. This co-deposition strategy increased the active surface area 1.3-fold compared with physically adsorbed MB/GOx, resulting in significantly enhanced electrocatalytic activity. The sensor achieved a low detection limit of 25.2 μM, a wide linear range of 0.1–65 mM, excellent repeatability (RSD = 4.12 %), high selectivity (interference <5.4 %), and good long-term stability (86 % signal retention after 15 days). Moreover, it maintained a stable current response (RSD = 1.22 %) under repeated bending and mechanical deformation. In comparison of sequential electrodeposition and physical adsorption methods, this one-step co-electrodeposition enables MB and GOx to assemble synergistically on the CNTY surface, improving enzyme retention, increasing electroactive surface area, and facilitating efficient electron transfer. These results highlight the advantages of the CNTY-based co-electrodeposition approach and its potential for developing flexible, wearable glucose monitoring devices beyond traditional MB/GOx platforms.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yifan Sun,Min Zheng
The prompt and accurate detection of methylene blue (MB), a harmful cationic dye, is crucial for environmental monitoring. This research involved the creation of orange fluorescent carbon dots (CDs), specifically tailored for MB identification. Utilizing fluorescence resonance energy transfer (FRET), the presence of MB significantly quenches the fluorescence intensity of CDs. Thus, CDs can detect MB with high selectivity, rapid response and enhanced sensitivity, achieving a low detection limit of 0.30 μM. Consequently, CDs proved to be effective tools for MB analysis in authentic aquatic environments and cellular contexts. We also developed a simple, portable detection system using a smartphone equipped with an RGB application, achieving a limit of detection (LOD) of 0.23 μM. Additionally, CDs have demonstrated effectiveness in detecting MB in enoki mushrooms. These findings highlight the future role of CDs as glorious optical sensing platform for pollutant detection and bioimaging.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 10
·3909-3917
·
IF 4.58
Wen Yi,Yuan Yali,Li Le,Ma Dandan,Liao Qi,Hou Shaoyan
The authors describe an ultrasensitive amperometric enzymatic assay for uranyl ion. It is based on the use of mesoporous silica nanoparticles (mesoSiNPs) loaded with Methylene Blue (MB) and functionalized with an UO 2 (II)-dependent DNAzyme. The electroactive label MB was sealed in the inner pores of the mesoSiNPs along with double stranded DNA (containing the DNAzyme and the substrate strand). In the presence of UO 2 (II), the DNAzyme is actived to cleave the substrate strands. This leads to the cleavage of the caps and the release of MB from the mesoSiNPs. The amount of released MB depends on the concentration of UO 2 (II) and can be determined amperometrically, best at a working voltage of −0.25 V (vs SCE), by using a chitosan coated carbon paste electrode. Response is linear in the 20 pM to 0.1 nM UO 2 (II) concentration range, and the detection limit is as low as 0.15 pM. Recoveries from spiked samples varied from 91.3 to 99.4%. The assay is highly specific, selective, and not interfered by other metal ions.
(a) Schematic representation of the synthesis, MB loading, and dsDNA Binding of the mesoSiNPs, as well as the release of MB from mesoSiNPs in the presence of UO 2
2+ . (b) Schematic illustration of the stepwise DNAzyme-based electrochemical sensor for uranium detection.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Jinbo Yang,Min Zhang,Yanwei Zhang,Lei Ding,Jing Zheng,Jingli Xu
This study reports the fabrication of hierarchical magnetic magnesium silicate hollow nanotubes . Owing to its unique structure and high surface area (539.36 m 2 g −1 ), the as-prepared hierarchical magnetic hollow nanotubes exhibit excellent adsorption performance on uptake of methylene blue (MB). Particularly, this strategy can be extended as a general method to prepare other magnetic metal silicate hollow nanotubes.
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Junyin Pan,Lijia Zhou,Haihua Chen,Xiaohan Liu,Chenlu Hong,Du Chen,Bingjun Pan
The involved interaction information concerning adsorbate-adsorbate and adsorbate-adsorbent is indispensable for developing and optimizing adsorption treatment of dye wastewater. Single and bi-solute adsorption of methyl orange (MO), indigo carmine (IC), and methylene blue (MB) on polystyrene anion exchanger (PsAX), defunctionalized version of PsAX (DF-PsAX), and hyper-cross-linked polystyrene adsorbent (MN200) were investigated to obtain a mechanistic understanding. Under acidic condition, higher adsorption efficiencies of PsAX due to extra intermolecular interactions of MO between the protonated tertiary amine group and the sulfate groups were observed, while strong alkaline condition is favorable for the adsorption of IC and MB by PsAX. MN200 exhibited much larger adsorption capacity toward MB than that toward MO or IC, because the fused-rings structure of MB is more polarizable and can form stronger nonionic intermolecular attractions with the matrix structure of polystyrene adsorbents. Bi-solute adsorption reveals that MO has obvious competitive effect toward IC adsorption at low concentrations, but it is not the case for the adsorption at high concentrations, where IC molecules can form intermolecular H-bonding interactions to defend the competition. the thermodynamic parameters confirm the endothermic and spontaneous nature of MO adsorption by PsAX, and ≈ 48 KJ mol −1 of the enthalpy change (∆H) imply the adsorption is not just physical absorption . Additionally, water/ethanol mixture solution of NaCl can almost thoroughly regenerate the exhausted PsAX, whereas only aqueous solution without ethanol is invalid.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）