CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2022
·
IF 4.119
Haosheng Sun,Jun Qin,Ludong Yi,Yinghao Ruan,Yanan Sun,Jun Wang,Dawei Fang
Hydrodynamic cavitation (HC), as a new AOP, has been tried to treat some organic dye wastewater. In traditional HC equipment only positive pressure from water pump was used, which results in a low degradation extent. In this paper, the negative pressure from water pump is used to intensify the whole HC effect for enhancing the decolorization and mineralization of methylene blue (MB) in wastewater. Some influence factors (orifice plate hole number, inlet pressure, initial concentration and solution temperature) on MB degradation efficiency are studied. The determined results of Total Organic Carbon (TOC) and Liquid Chromatograph-Mass Spectrometer (LC-MS) were used to identify MB mineralization extent and confirm the intermediate products during MB degradation, respectively. The results showed that, under the conditions of low temperature, high inlet pressure and moderate dye concentration, the negative pressure assisting hydrodynamic cavitation (NPA-HC) system displayed a significantly enhanced MB degradation effect. The most efficient combination of 25 hole negative pressure assisted 3 hole positive pressure is obtained. At 30 °C in 10 mg/L MB solution, the degradation ratios are 27.43% (in NPA-HC) and 97.48% (in NPA-HC+H 2 O 2 (MB/H 2 O 2 = 1.0:7.5 in molar ratio)), respectively. And that, in single positive pressure HC system the MB degradation ratio is only 16.23%. This study provides a feasible method for intensifying organic dye HC degradation and enlarging wastewater treatment scale.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 14
·6076-6082
·
IF 3.269
M. X. Hu,Q. Guo,J. N. Li,C. M. Huang,G. R. Ren
Metal nanoparticles exhibit high catalytic activity in catalytic reactions due to their large surface area and abundant exposed coordination sites. Immobilization of metal nanoparticles provides an efficient method to increase the chemical stability and mechanical strength of the metal nanoparticles. Compared with the free metal nanoparticles, the immobilized metal nanoparticles are particularly suitable as they can be recycled and used in the flow-through systems. Polymeric membranes with high specific surface area are suitable carrier materials to immobilize nanoparticles. In this study, Ag nanoparticals (AgNPs) were uniformly immobilized on the surface of microporous polypropylene membranes (MPPMs) via in situ reduction of Ag+ by the polydopamine (PDA) layer adhered on the membrane surfaces. FT-IR/ATR was used to characterize the chemical structure of MPPMs after modification. SEM and EDX mapping images were obtained to characterize the distribution and stability of the AgNPs on the membranes. The amount of immobilized AgNPs is directly linked to the skin layer of PDA on the membranes. The AgNP-immobilized membranes showed high catalytic activity for methylene blue (MB) reduction with NaBH4. The dye solution quickly and completely discolored as the MB solution flowed past the AgNP-immobilized MPPM. Ethanol is a good cleaning and wetting agent to regenerate the AgNP-immobilized membranes and improve the catalytic activity of the membranes. The flow rate and residence time together define the catalytic efficiency. The flow-through membrane reactor had the best performance when the flow rate was greater than 210 L m−2 h−1 (the residence time was only 2 s). These results reveal the promising potential large-scale applications of the AgNP-immobilized membranes for dye removal and wastewater treatment.
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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.
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DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 8
·1809
·
IF 4.2
Yuhong Zhao,Qi Zhang,Zhuhua Gong,Wenlin Zhang,Yun Ren,Qiang Li,Hongjia Lu,Qinhong Liao,Zexiong Chen,Jianmin Tang
In this study, we prepared high-nitrogen self-doped porous carbons (NPC1 and NPC2) derived from the pruned branches and seeds ofZanthoxylum bungeanumusing a simple one-step method. NPC1 and NPC2 exhibited elevated nitrogen contents of 3.56% and 4.22%, respectively, along with rich porous structures, high specific surface areas of 1492.9 and 1712.7 m2g−1and abundant surface groups. Notably, both NPC1 and NPC2 demonstrated remarkable adsorption abilities for the pollutant methylene blue (MB), with maximum monolayer adsorption capacities of 568.18 and 581.40 mg g−1, respectively. The adsorption kinetics followed the pseudo-second-order kinetics and the adsorption isotherms conformed to the Langmuir isotherm model. The adsorption mechanism primarily relied on the hierarchical pore structures of NPC1 and NPC2 and their diverse strong interactions with MB molecules. This study offers a new approach for the cost-effective design of nitrogen self-doped porous carbons, facilitating the efficient removal of MB from wastewater.
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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.
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2018
·
IF 2.631
Y. Chen,X.H. Chen,Y.W. Liu,Z.N. Yang,Z. Zhang
Adsorption behaviour of Methylene blue (MB) on mild steel in hydrochloric solution has been investigated by weight loss, electrochemical impedance spectroscopy, electrochemical noise (EN), scanning electron microscopy and Raman spectra. The potentiodynamic polarization studies revealed that MB acted as a mixed type inhibitor. Thermodynamic results indicated that MB adsorption mechanism changed from physically adsorption to chemisorption mechanism with different concentrations. A parameter of pitting active energy C AE was proposed to evaluate the pitting nucleation/growth process initially increases with increasing MB concentration (0.000159–0.000638 wt%) when follows physical adsorption and reaches a maximum value at 0.1 mmol/L, then decreases with further increasing MB concentration (0.00318–0.159 wt%) when chemisorption mechanism was obeyed. This work supplied a new criterion to distinguish the physical and chemical adsorption behaviour.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Zhigang Jia,Lianyong Wu,Daqin Zhang,Cong Han,Min Li,Ran Wei
Wood tar is the main by-product of thermal cracking of biomass. Magnetic biomass activated carbon (M-RWTAC) has been prepared from wood tar. The phenol component in the wood tar has firstly been fixed by phenolic reaction. The resinifero wood tar is subsequently employed to prepare magnetic biomass activated carbon through carbonization, activation and magnetization steps. The surface structure, property and magnetic properties of magnetic biomass activated carbon analyzed by a variety of techniques. Rich oxygen group and high specific surface area of the as-prepared M-RWTAC can provides convenient condition to the adsorption contaminate. Adsorption behavior of the as-prepared M-RWTAC is evaluated with MB as a model of dye pollutant. The MB adsorption of M-RWTAC is in accordance with the pseudo-second-order kinetic model and Langmuir model is predominant for this adsorption system with the maximum adsorption capacity of 528 mg g −1 . The adsorption of MB onto M-RWTAC is an exothermic and entropy production process. The regenerated M-RWTAC can be recycled with the removal efficiency of 82.5 % after 5 successive adsorption cycles. The present study provides a new route to utilize wood tar by-product of biomass pyrolysis .
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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.
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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.
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高影响因子
NANO
·
2013
·
IF 1.167
SHIYONG BAO,HAN ZHU,PAN WANG,MEILING ZOU,MINGLIANG DU,MING ZHANG
A facile and green route was introduced to synthesize Pt nanoparticles (PtNPs) immobilized on Cu 2 O octahedrons to form Cu 2 O – Pt hierarchical heterostructure. Transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were employed to study their morphology, chemical and crystallographic properties of the Cu 2 O – Pt hierarchical heterostructure. These novel Cu 2 O – Pt hierarchical heterostructures show fascinating degradations of methylene blue (MB), due to the suppressed electron/hole recombination phenomena and the efficient ability to capture the light.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Nguyen Thi Ngoc Yen,Vuong Thanh Tuyen,Cao Thi My Dung,Le Thuy Thanh Giang,Tran T.T. Van
The degradation of persistent organic dyes, such as methylene blue (MB), is crucial for protecting aquatic environments, as these compounds are chemically stable and resistant to conventional treatment methods. The TiO 2 -based photocatalysts have been widely explored for pollutant degradation owing to their chemical robustness, eco-friendliness, and strong oxidative capability under light irradiation. However, its wide bandgap (∼3.0–3.2 eV) restricts optical absorption to the ultraviolet region, which comprises only a small portion, less than 5 % of solar energy. In this work, a UCNRs@TiO 2 core–shell nanostructured photocatalyst composed of NaYF 4 :30 Yb 3+ ,0.5 Tm 3+ upconversion nanorods (UCNRs) and TiO 2 nanoparticles was successfully fabricated to enhance both ultraviolet (UV) and near infrared (NIR)-responsive photocatalytic activity. The UCNRs serve as efficient optical converters, absorbing near-infrared light at 980 nm and emitting UV photons to activate TiO 2 , thereby extending its operational spectral range. Photocatalytic activity was evaluated under solar simulated irradiation by monitoring the degradation of MB at a concentration of 15 mg/L. The UCNRs@TiO 2 photocatalyst achieved a remarkable degradation efficiency of 100 % MB within 90 min with an apparent rate constant of 0.063 min −1 , in contrast to 195 min required by bare TiO 2 . In addition, the photocatalytic enhancement mechanism of UCNRs@TiO 2 materials was also proposed based on the results of Photoluminescence, UV–Vis spectra and LC-MS. The excellent stability of the composites after three cycles of reuse demonstrates their promise for the rational design of NIR-driven photocatalysts for sustainable wastewater treatment.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yafang Li,Tao Tian,Zijie Zhang,Zhihao Li,Le Tian,Yinong Sun,Yixia Zhao,Jingge Ju
The porous alumina‑carbon composite fibers (PACF) were innovatively prepared through the implementation of an coaxial electro-blown spinning (EBS) method in conjunction with carbonization process. This study pioneers a strategy where a carbon precursor core is encapsulated by an alumina precursor shell, co-incorporating PTFE as a porogen. This design yields a continuous porous carbon network within the alumina fiber, serving as a skeleton to ensure mechanical integrity and inhibit brittleness, while component diffusion enables surface carbon exposure for rapid adsorption. The optimal PACF (prepared at an inner-outer flow rate of 1:2, 3 °C/min, 800 °C) possesses a hierarchical pore structure, a high specific surface area (349 m 2 /g), and exhibits exceptional methylene blue adsorption performance (99% removal in 2.5 min) with excellent reusability (maintained a high adsorption efficiency of 95.5% even after five adsorption–desorption cycles). The superior adsorption performance of PACF originates from its hierarchical pore architecture formed by porous carbon and alumina, where carbon-derived micropores supply abundant adsorption sites and alumina-derived mesopores serve as efficient diffusion channels. This multiscale pore synergy reduces mass-transfer resistance and promotes methylene blue diffusion and accumulation within the fibers, enabling rapid and efficient adsorption. The synergistic effect between porous alumina and carbon endows the PACF with superior comprehensive performance, highlighting its potential for practical wastewater treatment applications.
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高影响因子
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