Desalination and Water Treatment
·
2014
·
IF 0.987
Ling Li,Jun Cheng Li,Zhuang Rao,Gong Wu Song,Bin Hu
The adsorpion of methylene blue from aqueous solution on a highly porous metal-organic framework material [Cu3(BTC)2(H2O)3] was studied in conjunction with the adsorption isotherm, kinetics and regenerate of the sorbent. The adsorption isotherms of methylene blue on [Cu3(BTC)2(H2O)3] followed both the Freundlich isotherm and the Langmuir adsorption isotherm. Adsorption kinetics was determined from the experimental data, and the results showed that the adsorption obeyed a pseudo-second-order kinetics. The best oscillate time and the best [Cu3(BTC)2(H2O)3] amount were discussed, and [Cu3(BTC)2(H2O)3] gave high adsorption in only 5 minutes. The used [Cu3(BTC)2(H2O)3] could be regenerated by glycol solution, thus recycled. SEM image and FT-TR spectra of recycled [Cu3(BTC)2(H2O)3] after different adsorption times were compared. The high adsorption capacity and excellent reusability make [Cu3(BTC)2(H2O)3] attractive for the removal of methylene blue from aqueous solution.
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Xiaowen Liu,Xin Zhang,Yuanyuan Liu,Mengjia Liu,Xiaodan Miao,Yuanfan Wang
Crystal morphology of nanomaterials has a strong influence on its adsorption-photocatalytic activities. In this work, ZnS nanomaterials (NMs) with various shapes were synthesized by substitution reaction using ZnO as templates. The obtained ZnS NMs existed in the forms of ZnO pseudomorph with cubic sphalerite structure and were composed of numerous nanocrystal ZnS. Due to its porous nature, short nanotubes exhibited better adsorption performance for methylene blue (MB) than nanosheets or nanotubes. Their photocatalytic efficiency for MB followed nanosheets > short nanotubes > nanotubes. There was a higher exposure ratio of {100} crystal planes on nanosheets than that on nanotubes or short nanotubes. The density of Zn-S broken bond on the crystal plane followed D (100) >D (110) > D (111) . The higher exposure ratio of {100} crystal planes could not only endow ZnS nanosheets with a narrower bandgap, but also provide more sites to absorb reactants and trap electrons or holes.
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 23
·2101266
·
IF 6.147
Zhong Dai,Peng-Gang Ren,Zhengyan Chen,Zhengzheng Guo,Xin Hou,Wenwei He,Yanling Jin,Fang Ren
The porous structure and heteroatom doping are crucial for the electrochemical performance of carbon materials for supercapacitors. However, designing carbon materials with appropriate pore sizes and heteroatom content is still facing daunting challenges. Herein, simultaneous regulation of porous structure and heteroatom doping in superabsorbent resin (SAR)-based activated carbon aerogels (SACAs) is implemented by facilely immersing superabsorbent resin in methylene blue (MB) solution with different concentrations, and then followed by freeze-drying and carbonization. The resulting SACAs possess variable oxygen/nitrogen/sulfur elements, adjustable high specific surface area, abundant micro–mesopores, and controllable porous structure. Hence, the assembled symmetric supercapacitors exhibit an excellent rate capacity of 83%, a superior energy density of 24.58 Wh kg −1 at the power density of 400 W kg −1 , as well as a satisfactory energy density of 20.84 Wh kg −1 at the power density of 4000 W kg −1 . Furthermore, outstanding cycling stability (94.59% retention) and high Coulombic efficiency (average value over 97%) are achieved for the supercapacitors after 10 000 cycles. This work broadens a new avenue to design the appropriate pore structure and heteroatom doping of carbon materials for high-performance supercapacitors.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Ziqing Tang,Xiaosai Hu,Hongyao Ding,Zongjin Li,Rui Liang,Guoxing Sun
Organic dye-containing wastewater has become an increasingly serious environmental problem due to the rapid development of the printing and dyeing industry. Hydrogel is a promising adsorbent for organic dyes because of its unique three-dimension network structure and versatile functional groups. Though many efforts have been made in hydrogel adsorbents recently, there is still a critical challenge to fabricate hydrogel adsorbent with high adsorption capacity and high efficiency at the same time. To address this concern, we developed a calcium hydroxide nano-spherulites/poly(acrylic acid -[2-(Methacryloxy)ethyl]trimethyl ammonium chloride) hydrogel adsorbent with novel villi-like structure. The hydrogels were prepared through a simple free radical copolymerization method using calcium hydroxide nano-spherulites as crosslinker. The resultant hydrogel adsorbents showed a maximum adsorption capacity of 2249 mg/g in a 400 mg/L methylene blue solution and a high removal ratio of 98% in 1 h for a 50 mg/L methylene blue solution. In addition, the adsorption behaviors of our hydrogel adsorbents could be well described by pseudo-second-order kinetic model and Langmuir adsorption isotherm model. Furthermore, this kind of hydrogel adsorbent showed selective adsorption behavior for methylene blue. Altogether, the hydrogel adsorbent developed in this work has a high capacity and high efficiency in organic dye removing and promised a great potential in wastewater treatment application.
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Hui Dong,Ke Xu,Yidan Ye,Yitong Jiang,Zhiqin Zhang,Aixin Chang,Yan Zhou,Jiahui Ding,Yanli Zhou,Yintang Zhang,Zhaohui Li,Maotian Xu
Hypochlorous acid (HClO), a key reactive oxygen species, oxidative stress induced by its abnormal levels is associated with various human diseases. This study develops a multi-mode (electrochemical, near-infrared fluorescence, colorimetric) detection system (MB-NB probe) for accurate serum HClO detection. The MB-NB probe uses methylene blue (MB) as the signal reporting unit (with electrochemical activity, characteristic color, and near-infrared fluorescence properties), and phenylboronic acid pinacol ester as the specific recognition site for HClO. When HClO interacts with the probe, the boronate ester group undergoes an oxidative deborylation reaction, which triggers the cleavage of the amide bond and the release of free MB, which synchronously induces three characteristic signal changes: in the electrochemical mode, the reduction peak current at −0.31 V increases linearly with the concentration of HClO (detection range: 2–80 μM; detection limit: 0.23 μM); in the colorimetric mode, the absorption peak at 665 nm is enhanced and the solution changes from colorless to blue; in the fluorescence mode, the near-infrared fluorescence intensity at 685 nm is significantly enhanced (linear range 10–100 μM). The tri-mode detection system provides a reliable tool for the accurate determination of HClO levels in serum, thus laying a technical foundation for in-depth exploration of the associations between changes in HClO content and the pathogenesis of various human diseases.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Jiaqi Li,Yidan Zhang,Pingyu Luo,Chun Li,Fanming Zeng,Tiantian Sun,Hanhui Lei,Xiaoteng Liu,Chunbo Liu
Persulphate-based advanced oxidation technology efficiently and cost-effectively removes organic dyes from water but designing stable photocatalytic systems and understanding their reaction mechanisms remain key challenges. Metal–organic frameworks (MOFs) have attracted considerable research attention for degrading organic pollutants owing to their high porosity, tunable structure, and ease of modification. In this study, a series of M-MOF-74 (M = Co, Fe, Ni) photocatalysts are synthesized by a hydrothermal method for methylene blue (MB) degradation. Among them, the Co-MOF-74 photocatalytic synergetic peroxymonosulfate system exhibits high catalytic activity after 30 min of visible light irradiation. MB degradation efficiency reaches 94.8%, and the reaction rate constant is 0.210 min−1, which is approximately 19.44 times higher than the reaction rate constant of the original Co-MOF-74. Compared with Fe-MOF-74 and Ni-MOF-74, Co-MOF-74 exhibits better photocatalytic performance due to the dynamic changes in the valence state of cobalt, which more effectively facilitate the activation of PMS. In addition, this study analyses the possible degradation pathways of MB in water and toxicological evaluations of intermediate products, providing new insights for the effective removal of dyes in water.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Xiaoyu Zhu,Chen Cheng,Xingao Qin,Ying Wang
Per- and polyfluoroalkyl substances (PFAS) have raised significant concerns; however, their accurate detection in aqueous environments remains a major challenge. In this study, a host-guest molecularly imprinted polymer-based electrochemical sensor with enhanced antifouling properties were developed using β-cyclodextrin embedded with methylene blue (βCD-MB MIP). This sensor demonstrated sensitive and selective quantification of perfluorooctanoic acid (PFOA) in real water samples. The βCD-MB MIP was fabricated by electro-polymerizing βCD and MB in the presence of the target molecule, PFOA, where βCD served as the functional monomer and MB as the signaling probe. The incorporation of βCD endowed the MIP with a stable hydration layer, promoting hydrophilicity and inhibiting fouling, while ensuring effective electron transfer from MB, resulting in significant current responses and outstanding antifouling performance. This sensor exhibits excellent sensing capabilities towards PFOA with a detection limit of 1.57 pg mL −1 , covering a wide concentration range from 4.14 ng mL −1 to 41.4 mg mL −1 . It also displayed high selectivity for PFOA with an imprint factor of 6.5, which is five to seven times higher than that of other perfluorinated analogs. This study introduces an innovative platform for the rapid quantification of PFAS using redox-active MIPs and sets the groundwork for developing integrated sensors for continuous PFAS monitoring in water.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Xiaojing Tang,Guansheng Liu,Dongliang Wang,Hua Zhong
This study evaluates the methylene blue method for rapid and cost-effective analysis of perfluoroalkyl substances (PFAS). By employing three perfluorosulfonic acids (PFSAs) (perfluorooctanesulfonic acid (PFOS), perfluorohexanesulfonic acid (PFHxS) and perfluorobutanesulfonic acid (PFBS)), three perfluorocarboxylic acids (PFCAs) (perfluorooctanoic acid (PFOA), perfluorohexanoic acid (PFHxA) and perfluorobutanoic acid (PFBA)) and two non-fluorinated compounds (sodium 1-octanesulfonate (SOS) and octanoic acid (OA)), the impact of PFAS structure, specifically polar group type, carbon chain length and fluorine substitution, on the efficacy of the method was assessed. The results showed that PFSAs produced reliable calibration curves (R 2 > 0.99) across all pH levels due to strong dissociation of the -SO 3 H group. In contrast, PFCAs exhibited pH-sensitive performance in that PFOA (C8) showed good linearity (R² > 0.99) at pH ≥ 4, while shorter-chain PFHxA (C6) and PFBA (C4) had poor linearity for all of the pHs tested (1.6–10.0, R² < 0.95). Hydrophobicity-driven partitioning of methylene blue active substance (MBAS) into chloroform was critical, with long-chain PFAS (e.g., PFOS, PFOA) showing stable absorbance despite that the volume of washing solution increased up to 20 mL. The method was ineffective for SOS and OA, which are non-fluorinated analogs of PFOS and PFOA. The modified MB method developed in this study provides high-quality calibration curves for PFSAs and long-chain PFCAs, with a quantification limit as low as 0.03 mg/L, offering a rapid and cost-effective alternative to HPLC-MS for analysis of some PFAS compounds.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Han Guo,Jingwei Kou,Houle Xiang,Hui Wang,Ting Guo,Hanjie Ying,Huanqing Niu,Jinglan Wu
Wastewater that contains highly toxic and carcinogenic organic dyes is harmful to the environment. Herein, a novel magnetic multifunctional pH-responsive adsorbent (Fe 3 O 4 @UiO-66-NH 2 /GSH) was developed, which showed excellent adsorption properties for both anionic and cationic dyes at different pH values. The adsorption capacities for CR (pH = 2) and MB (pH = 11) at 298.15 K were achieved at 1609.73 mg/g and 1827.24 mg/g, respectively. The effect of pH on the adsorption capacity was discussed experimentally and theoretically. Moreover, the uptake of four additional dyes (MO, AB, NR, and MV) was determined to test the application properties of the prepared particles. The influence of the salt concentration was also studied. The results showed that the prepared adsorbents can be applied in the treatment of complex dye wastewater. At the end of this work, the adsorption mechanism was investigated systematically by adsorption thermodynamics and hydrodynamics, as well as by comparing the FTIR and XPS results before and after adsorption. This demonstrated that electrostatic interactions played an essential role in the adsorption process. Last but not least, the regeneration rate of Fe 3 O 4 @UiO-66-NH 2 /GSH remained above 90 % after four consecutive adsorption-desorption cycles in 10 % and 20 % ethanol solutions, which indicated that it had good reusability and recyclability and was an economical material. Thus, the synthesized Fe 3 O 4 @UiO-66-NH 2 /GSH is a promising adsorbent that can be used for dye removal.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 30
·期 3
·976-985
·
IF 1.637
Zou Jiaming,Liao Kaifa,Xiang Li,Liu Mouwu,Xie Fan,Liu Xinlin,Yu Jianglai,An Xiaonan,Wang Yanfei
Poly (cyclotriphosphazene-co-4,4′-diaminodiphenyl sulfone) (PZD) microspheres were prepared by precipitation polymerization with simple scheme and convenient operation, and used as a special effect adsorbent for adsorbing cationic dye, which is methylene blue (MB) in water. The synthesized PZD microspheres were characterized by SEM, TEM and XPS techniques. The influences of temperature, adsorption time, pH initial MB solution concentration and adsorbent dosage on MB adsorption were studied. The experimental results show that the adsorption of MB dye by PZD microspheres is more in line with the pseudo-second-order kinetics model than the pseudo-first-order kinetic model. In addition, the adsorption process was further resolved using Weber’s intraparticle diffusion model. Thermodynamic experiments show that the adsorption process is spontaneously carried out by endotherm. The mechanism of adsorption of MB dye by PZD microspheres may be related to the existence of a lot of electron-rich atoms N, P, S in the adsorbent, the electrostatic attraction and π–π stacking effect between PZD microspheres and MB dye.
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Lixin Li,Ying Lv,Jie Wang,Chao Jia,Zhaoshun Zhan,Zilong Dong,Lilai Liu,Xiangdong Zhu
Porous carbon obtained by co-pyrolysis of plastic and biomass has received a lot of attention due to its excellent adsorption properties, and the pore structure plays an essential role in adsorption performance, however, the pore structure is still not well understood. Herein, we synthesized cyanobacteria-based porous carbon derived from cyanobacteria and polypropylene plastic by one-step method. CPC-800–30% exhibited a high BET surface area (2140 m 2 /g), pore volume up to 1.44 cm 3 /g. PP not only improved the pore structure of porous carbon, but also enriched the types of functional groups, such as O–H, N–H, C=O, and –CH, due to dehydroxylation or amino group decreased, resulting in the hydrogen radicals increased, hence PP had positive effect for biomass during co-pyrolysis. Meanwhile, CPC-800–30% showed excellent methylene blue (MB) adsorption capacity (667 mg/g). This work provided a new strategy for enhancing porous carbon structure via using PP as additive.
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2018
·
IF 1.666
Shanshan Liu,Heyi Ge,Shilin Cheng,Yu Zou
In this work, a novel bio-adsorbent with a unique structure was prepared through one-step crosslinking in the emulsion using corn straw core (CSC), CoFe2O4 and chitosan (CS) as raw materials for adsorption of methylene blue (MB). The preparation method of the adsorbent was simple and environmentally friendly. In the adsorbent, the agricultural waste of CSC acted as scaffold and was wrapped with CS. CoFe2O4 was embedded in CS, giving magnetic property to the adsorbent, which was beneficial to the separation process. XRD, FTIR, SEM and TEM were utilized to characterize the adsorbent and the factors affecting adsorption removal efficiency were explored. The pseudo-second-order model and the Langmuir model described the adsorption behaviour well. The equilibrium adsorption capacity was 122 mg g−1 for MB at 298 K. The thermodynamic studies suggested that the adsorption was a spontaneous, exothermic and randomness decrease process. MB loaded on the adsorbent could be desorbed by immersing in dilute acid solution, indicating that this kind of biomass adsorbent can be widely used in the field of adsorption.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）