JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2021
·Vol. 54
·期 24
·244002
·
IF 3.207
De-Zheng Yang,Xiong-Feng Zhou,Jian-Ping Liang,Qing-Nan Xu,Hong-Li Wang,Kun Yang,Bo Wang,Wen-Chun Wang
In this work, high-voltage pulsed Ar gas–liquid discharge synergizing iron-based catalyst-activated persulfate (PS) was employed to degrade methylene blue (MB) in water. The catalytic performances of two types of iron-based catalysts, namely the homogeneous catalyst Fe2+ and the heterogeneous catalyst nano-Fe3O4, were compared. Correspondingly, the plasma gas temperature and excited species were calculated and diagnosed using optical emission spectra. It was found that the introduced plasma process significantly enhanced the degradation efficiency of MB by the PS/Fe2+ and the PS/Fe3O4 systems. After 20 min of treatment, the MB degradation efficiency reaches 97.5% and 83.1% in the hybrid plasma/PS/Fe2+ and plasma/PS/Fe3O4 systems, respectively, which is 37.9% and 35.6% higher than that in the PS/Fe2+ and PS/Fe3O4 systems. The synergistic mechanism and key reactive species responsible for MB degradation in hybrid plasma/PS/Fe2+ and plasma/PS/Fe3O4 were explored using the addition of radical scavengers and control experiments under various conditions. The homogeneous catalyst Fe2+ exhibits better activation performance in PS and plasma than that of the heterogeneous catalyst nano-Fe3O4.
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高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2013
·Vol. 47
·期 6
·1177-1196
·
IF 1.884
Si Hongyan,Wang Ting,Xu Zuwei
The preparation, characterization, and environmental application of β -cyclodextrin/citric acid/wood flour ( β -CD/CA/WF) graft copolymer wood-based biosorbent for methylene blue (MB) biosorption were investigated in this paper. The Fourier transform infrared spectroscopy and the technique of phenolphthalein probe were used to characterize the grafting β -CD. Furthermore, the biosorption behavior of MB on β -CD/CA/WF graft copolymer was studied under various conditions of pH, contact time, and initial MB concentration. The results indicated that the biosorption of MB was dependent on both the initial MB concentration and the initial pH. Langmuir isotherm model fitted the isotherm data better than the Freundlich model. The adsorption kinetics followed the pseudo-second-order kinetic model, and intraparticle diffusion was one of the effective rate-controlling steps for the entire biosorption period. Equilibrium and kinetic results have implied that β -CD/CA/WF graft copolymer could be considered as a promising material for the adsorption of dye from aqueous solutions.
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高影响因子
DALTON TRANSACTIONS
·
2013
·Vol. 43
·期 9
·3792-3798
·
IF 3.806
Wen-Tao Xu,Lin Ma,Fei Ke,Fu-Min Peng,Geng-Sheng Xu,Yu-Hua Shen,Jun-Fa Zhu,Ling-Guang Qiu,Yu-Peng Yuan
Metal–organic frameworks (MOFs) MIL-88A hexagonal microrods as a new photocatalyst show an active performance for methylene blue (MB) dye decolorization using visible light. MB decolorization over the MIL-88A photocatalyst follows first-order kinetics. The addition of a H2O2 electron acceptor can markedly enhance the photocatalytic MB decoloration performance of MIL-88A. Moreover, MIL-88A showed a very stable activity for MB decoloration after four consecutive usages. Owing to the advantages of the visible light response, low cost and abundance in nature, this active MIL-88A MOF photocatalyst would have great potential for environmental purification.
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高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-15
·
IF 3.9
Tan Siwei,Ruan Xiaoyin,Ye Haipeng,Shao Ji,Shan Xiaoyue,Shi Yanpeng,Le Yanna
Wastewater treatment requires materials with a high capacity for adsorbing diverse pollutants. A novel adsorbent was synthesized herein by wrapping glucose/graphene oxide hybrids with aluminum hydroxide in a cetyltrimethylammonium bromide microemulsion and was used for dual adsorption of fluoride (FL) and methylene blue (MB) from water. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) analysis, and Barrett–Joyner–Halenda analysis were employed to characterize the synthesized adsorbent. The pH, initial pollutant concentration, adsorbent dose, and contact time for dual adsorption were determined. Isotherm and kinetic models were applied to investigate the dual adsorption mechanism. Attributed to the good microstructure, enhanced surface area, and ion-exchange behavior, the maximum adsorption capacity of this adsorbent was 14.8 mg/g for FL (1.0 g/L adsorbent) and 232.6 mg/g for MB (0.2 g/L adsorbent) simultaneously at pH 6.0. The enhanced adsorption efficiency and multi- selectivity of this adsorbent suggest its potential to decrease the regeneration frequency of adsorption materials, lower processing costs, and mitigate environmental impacts. This adsorbent is suitable for future development as a sustainable slow-release agent, enabling prolonged use with straightforward operational procedures and efficiency.
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PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Bin Ren,Yuelong Xu,Lihui Zhang,Zhenfa Liu
A novel, carbon-doped graphitic carbon nitride (C C 3 N 4 -20) was used for methylene blue (MB) removal from an aqueous solution. In dye adsorption experiments, C C 3 N 4 -20 showed a high MB adsorption efficiency due to its extended π-conjugation system and porous structure, the maximum adsorption capacity of C C 3 N 4 -20 for MB was 57.87 mg g −1 , when the initial concentrations of MB were 20 mg L −1 . A Langmuir model fit the MB adsorption isotherm of C C 3 N 4 -20, and a pseudo-second-order kinetic model fit the adsorption kinetics. The MB adsorption process on C C 3 N 4 -20 is physical and mainly via electrostatic attraction and π–π interactions.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2016
·Vol. 73
·期 11
·2815-2823
·
IF 1.064
Zha Yiming,Zhou Ziqing,He Haibo,Wang Tianlin,Luo Liqiang
Nanoscale zero-valent iron (nZVI) incorporated with nanomagnetic diatomite (DE) composite material was prepared for catalytic degradation of methylene blue (MB) in heterogeneous Fenton system. The material was constructed by two facile steps: Fe 3 O 4 magnetic nanoparticles were supported on DE by chemical co-precipitation method, after which nZVI was incorporated into magnetic DE by liquid-phase chemical reduction strategy. The as-prepared catalyst was characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, magnetic properties measurement and nitrogen adsorption–desorption isotherm measurement. The novel nZVI@Fe 3 O 4 -diatomite nanocomposites showed a distinct catalytic activity and a desirable effect for degradation of MB. MB could be completely decolorized within 8 min and the removal efficiency of total organic carbon could reach to 90% after reaction for 1 h.
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 12
·12517-12525
·
IF 1.338
Xiao Xin,Liu Chao,Zuo Xiaoxi,Liu Jianju,Nan Junmin
Flower-like BiOCl microspheres are synthesized by a microwave route, and their pH-dependent adsorption and recovery of methylene blue (MB) are studied. The as-synthesized BiOCl exhibits hierarchical structures with dominant {001} facets, a specific surface area of 36.39 m2
g−1, and mesoporous approximately 18 nm in diameter. Compared with BiOCl nanoplates, the adsorption of MB (20 mg L−1, pH = 6.8) over the BiOCl microspheres increases from 21% to 98.2% after only 2 min using an adsorbent dosage of 1 g L−1.
The excellent adsorption capacity, i.e., a maximum capacity of 24.2 mg g−1 and 26.2 mg g−1 at pH = 6.8 and 3.5, respectively, is attributed to the negatively charged facets, high surface area, and unique defects/vacancies and micro/nanostructures of as-synthesized
material. In addition, the adsorption of MB at pH = 11.9 is only approximately 1/14 of that at pH less than 6.8, indicating the pH-dependent adsorption behavior of the BiOCl. Thus, the BiOCl microspheres are regarded as a promising green pH-dependent adsorbent, and the adsorbed MB is recovered
instead of degraded. The pH-dependent adsorption behavior for MB over the BiOCl is demonstrated to be closely related with not only the unique surface of the BiOCl microspheres but also the polarity of MB in different solution pH.
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高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 2
·125
·
IF 5.4
Ye Jiaqing,Shen Hao,Wu Jiacai,Feng Bin,Yu Shaoning
We constructed a novel fluorescent aptasensor based on Zr-MOF@MB composite material for rapid and highly sensitive detection of probiotics Bacillus subtilis and Lactobacillus acidophilus in shrimp aquaculture. The sensor utilizes a zirconium-based metal–organic framework to load the signal molecule methylene blue (MB) and immobilizes specific aptamers via Zr–O–P bonds to form a gating structure. In the presence of the target bacteria, a conformational change in the aptamer triggers the release of MB, leading to a decrease in fluorescence intensity, thereby enabling quantitative determination of the bacteria. The method completes detection within 30 min, with a linear range of 10¹ to 10⁷ CFU/mL and detection limit of 7 CFU/mL for B. subtilis and 10 CFU/mL for L. acidophilus . The developed sensor is simple to operate and highly sensitive, providing a reliable tool for effective monitoring of probiotics in shrimp aquaculture and offering new insights for the development of aptamer-based sensors for microbial detection in complex matrices.
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PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 2.8
Zhangxu Chen,Fanli Meng,Hongyun Ren,Lifen Zhang,Minglian Fu,Danchen Zhu
A key factor limiting the photocatalytic performance of pure graphitic carbon nitride (g-C 3 N 4 ) is the swift recombination of photogenerated electron–hole pairs. To address this issue, the ZnO/g-C 3 N 4 composites were synthesized via a one-step calcination method. Their structure, composition, and morphology being characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). An L 16 (4 5 ) orthogonal array was employed to investigate the effects of various factors on the removal efficiency. The results exhibit that under optimal conditions (sunlight irradiation time: 20.0 h, pH: 7.00, catalyst dosage: 40 mg, ZnO/g-C 3 N 4 mass ratio: 4:1), the methylene blue removal rate reached 92.36%. Comparative experiments demonstrated removal efficiencies of 43.64% for phenol, 52.13% for tetracycline, and 40.26% for pyridine, respectively. Moreover, the removal rate of methylene blue can still reach 90.12% after five cycles. Trapping experiments for active species confirmed that photogenerated electrons and holes are critical for methylene blue degradation. ZnO doping g-C 3 N 4 improves the methylene blue removal performance of g-C 3 N 4 , providing a facile strategy for developing g-C 3 N 4 /metal oxide heterostructure to deal with emerging contaminants in the future.
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高影响因子
OPTICAL MATERIALS
·
2026
·
IF 4.3
Cong Zhang,Huidong Xiong,Zhonghao Zhao,Xiaoyu Sun,Jingliang Cheng,Chaxiu Guo,Huadong Liu
In response to the need for efficient elimination of methylene blue (MB) from dye-containing wastewater, a Mo, N-co-doped carbon quantum dot-modified BiVO 4 (5% Mo, N-CQDs/BiVO 4 ) composite photocatalyst was developed. Pristine BiVO 4 suffers from rapid charge carrier recombination and limited visible-light utilization. Introduction of Mo, N-CQDs establishes a synergistic enhancement mechanism: (1) Mo, N-CQDs act as electron mediators, improving interfacial charge separation and migration, as evidenced by reduced charge transfer resistance. Mo doping introduces impurity energy levels that trap electrons and retard recombination, while nitrogen doping enhances electron tunneling and reduces interfacial resistance. (2) UV-Vis DRS confirms bandgap narrowing and enhanced visible-light absorption. (3) Photoelectrochemical analysis reveals significantly enhanced photocurrent response and reduced charge transfer resistance, confirming improved charge separation efficiency. Under visible light, the composite achieved a degradation rate constant of 0.04089 min −1 toward MB, a 3.31-fold enhancement over pure BiVO 4 , with >95% removal within 80 min. Radical trapping identified superoxide radicals (·O 2 − ) and holes (h + ) as the predominant active species, with h + contributing ∼62% of the activity. The catalyst retained 88.65% of its initial efficiency after four cycles, demonstrating good stability. This study provides a viable charge-regulation strategy using multi-element co-doped carbon quantum dots for semiconductor modification, highlighting its potential in dye wastewater treatment.
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ChemistrySelect
·
2025
·Vol. 10
·期 23
·e00337
·
IF 2
Jingjing Yang,Xiayan Zhang,Zhi Song,Jialu Liu,Yeqiong Huang,Dongxu Han,Chuhan Xing,Jing Zhang,Boxia Liu
Graphical The Ni 3 Fe 1 -BC composite, featuring a coral-like mesoporous architecture and exposed Ni 2+ /Fe 3+ active sites, facilitates the rapid, monolayer adsorption of methyl blue through strong Ni─O coordination. The process follows Langmuir isotherm and pseudo-second-order kinetics, indicating high affinity and thermodynamic spontaneity. In this paper, the coral-like structure of Ni/Fe bimetallic atom cluster composite adsorbent (Ni 3 Fe 1 -BC) was utilized for the efficient removal of methyl blue (MB), and a removal rate of 98% could be achieved within 25 min. The large specific surface area and mesoporous structure of the material provide effective channels for the diffusion and adsorption of MB molecules. Ni 2+ and Fe 3+ species act as key adsorption sites during the adsorption process, especially when the oxygen atoms in MB first interact with Ni atoms to form a stable chemical bond, which enhances the stability of adsorption. Meanwhile, the adsorption process conformed to the pseudo-secondary kinetic model, and the isotherm analysis showed that the Langmuir model fitted better, reflecting the monolayer adsorption characteristics. The adsorption energy E ads = −2.04 eV further proved that the adsorption process was spontaneous and exothermic with good thermodynamic stability. In addition, Ni 3 Fe 1 -BC exhibits excellent adaptability and cyclic stability in different water environments, making it an efficient and stable adsorbent for water treatment.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Guangyu Wu,Chengwei Zhou,Haoxin Li,Siye Xia,Yongli Zhu,Jiangang Han,Weinan Xing
Design and fabrication of outstanding adsorbents for treating organic pollutants in wastewater following green chemistry principles remain huge challenging. In this paper, a biomass cellulose aerogel@ZIF-8 (CA@ZIF-8) based on bamboo leaves cellulose aerogel (CA) was controllable synthesized and used for the removal of methylene blue (MB) from aqueous solution. CA was prepared from bamboo leaves by NaOH/ urea low temperature dissolution method and freeze-drying method, and then ZIF-8 was grown in situ on its surface, successfully preparing CA@ZIF-8 composite with three-dimensional porous structure. The tests of X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were used to characterize the structures of materials, and the related results showed that arsenic was successfully adsorbed by the prepared CA@ZIF-8. The influences of pH (2−12), contact time (5–180 min), temperature (298 K, 308 K, 318 K) and other factors on MB adsorption quantity were studied in the adsorption experiments, and the maximum adsorption capacity was about 90.18 mg/g at 298 K. The adsorption thermodynamics showed that the adsorption process of CA@ZIF-8 to MB was spontaneous and decreased with the increase of temperature. The possible adsorption mechanism was also suggested. The CA@ZIF-8 exhibited good reusability that the removal of MB remained above 77.25 % after 5 cycles. The above results show that CA@ZIF-8 is a economically and proficient suitable material for removing MB from wastewater.
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