JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Yinli Liu,Jie Jia,Tingting Gao,Xueli Wang,Jianyong Yu,Dequn Wu,Faxue Li
Novel nanofibrous membranes with outstanding adsorption property and high durability were fabricated by chemically immobilizing carboxymethyl-β-cyclodextrin polymers on the surfaces of biodegradable poly((butylene succinate-co-terephthalate)-co-serinol terephthalate) nanofibrous membranes via the amidation reaction. As an ecofriendly adsorbent, the resulting nanofibrous membranes presented rapid adsorption toward methylene blue (MB) dye with a removal efficiency of about 90% within 30 s and had the maximum adsorption capacity of 1030.9 mg/g to it. The thermodynamic parameters indicated that the adsorption process of the adsorbent to MB dye was endothermic and spontaneous. Selective adsorption was another advantage to the adsorbent, which showed preferable adsorption to cationic dye MB rather than anionic dye methyl orange with a separation efficiency of 99.9% to them. Inspiringly, the removal efficiency and mechanical properties of the adsorbent hardly changed after 20 regeneration cycles, indicating its good regeneration and high durability in treating the dye-containing wastewater.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Meijun Chen,Jianbo Zhang,Penghan Guo,Jingming Zhai,Xiaoran Liu,Dongmei Yu,Xiaomei You,Jinghua Li
This study primarily employed a one-step reduction method to synthesize palladium-platinum-copper nanovelvet flowers (PdPtCu NVFs). PdPtCu NVFs are multi-branched nanomaterials composed of nanosynapses that radiate in different directions. Their unique structure and incorporation of three metallic elements contribute to their outstanding Fenton catalytic vitality and photothermal performance. Characterizations for PdPtCu NVFs were conducted by using transmission electron microscope (TEM), electron paramagnetic resonance (ESR), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) techniques. Under near-infrared light, PdPtCu NVFs rapidly reached a temperature of 50 °C. In comparison with conventional photocatalysts, PdPtCu NVFs demonstrated significantly enhanced degradation of organic dyes (methylene blue, MB) degrading due to their superior Fenton catalytic activity. Even after multiple reuse, PdPtCu NVFs still exhibited distinct nanosynapses, along with excellent photothermal stability and Fenton catalytic activity. These results indicate that PdPtCu NVFs possess excellent purifying capabilities for organic wastewater.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xinkai Liu,Kang Jing,Shaohua Peng,Qianru Shi,Hui Liu
With acrylamide (AM), diethylenetriaminepentaacetic acid (DTPA), chitosan (CS), and graphene oxide (GO) as the raw materials, a GO-based composite aerogel named as APAM/DTPA-CS/GO (APAM = Anionic polyacrylamide) was constructed by a facile method. The composite aerogel was systematically characterized by scanning electron microscopy, Raman spectroscopy , X-ray photoelectron spectroscopy, and X-ray diffraction to confirm the successful preparation. Methylene blue (MB) was used as the model dye molecule to evaluate the adsorption behaviors of APAM/DTPA-CS/GO. The results showed that equilibrium adsorption capacity of the aerogel toward MB could attain 652.99 mg/g at 303 K, which was more efficient than many previously reported adsorbents. The main driving forces of adsorption process were electrostatic interaction , hydrogen bond , and π-π conjugate interaction. The adsorption process of MB by the composite aerogel could be well described by pseudo-second-order kinetic model and Langmuir isothermal model. APAM/DTPA-CS/GO still maintained high equilibrium adsorption capacity of more than 600 mg/g toward MB even after six adsorption-desorption cycles, indicating that the aerogel had excellent regenerability. The efficient and recyclable adsorption performances might endow GO-based composite aerogel with considerable application prospect in the treatment of dye wastewater.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 42
·95425-95437
·
IF 5.8
Zheng Guanfeng,Fu Peng,Li Zhiyu,Zhang Yuchun,Huang Xinfeng,Chen Jieming
Wood has a rich three-dimensional pore structure and many bottom-up nanochannels. However, the structure of wood itself has limited ability to adsorb dyes, so the effective combination of the unique structure of wood and Pd NPs was studied to achieve efficient degradation of dyes. First, the three-dimensional structure of natural wood is optimized by combining the complex pore structure of wood with Pd NPs to improve the contact process between the dye and Pd NPs. Then, Pd (II) ion can be well reduced to Pd NPs by wood lignin. In addition, Pd NPs can be fixed by hydroxyl groups on cellulose in wood. The flow state inside Pd NPs/wood film and the contact area between catalyst and dye were discussed in detail by hydrodynamic simulation, which filled the gap. It provides reference for composite structure. When Pd NPs/wood membrane was used to treat methylene blue (MB), the degradation efficiency was up to 96.7%, which was 90% higher than that of natural wood. Its TOF value was 1.82 mol MB mol Pd −1 min −1 , which was higher than that in the previous literature. Therefore, the novelty of this study is that the mechanism of catalytic degradation of MB by Pd nanoparticles/wood composites is reported for the first time. The internal flow mode and contact condition of the new material are understood, which has a good application prospect. Graphical Abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jialing Li,Qianlan Huang,Zhiyuan Peng
A highly effective ligninsulfonate-tannin adsorbent (LTA) with natural antibacterial activity was developed for the removal of methylene blue (MB) from wastewater. The results of Fourier transform infrared spectroscopy (FTIR) and x-ray photoelectron spectroscopy (XPS) showed the cross-linking reaction between CL and BWT, the results of scanning electron microscope (SEM) showed a granular structure of LTA with a rough surface. The saturation adsorption capacity of LTA for MB is 629.5 mg∙g −1 , and the adsorption process is a heat-absorbing, spontaneous process corresponding to the Langmuir isothermal and the pseudo-second-order kinetic adsorption model. Density functional theory (DFT) calculations were used to further elucidate the adsorption mechanism, which was the synergistic effect of amino groups in methylene blue with phenolic hydroxyl group and sulfonic acid group in LTA. It is unexpected to find that LTA retained the natural antibacterial activity of tannins, and inhibition of E. coli and S. aureus with 80.0% and 82.0%. Thus, LTA has a high value in the removal of dyes and biological contamination from wastewater due to its excellent adsorption capacity, and natural antibacterial properties.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Environmental Science and Technology
·
2023
·
IF 3.1
Cai Y.,Qiu C.,Yang K.,Tian B.,Bi Y.
Methylene blue is widely used in various industries. The discharge of industrial effluents with methylene blue residues may have hazardous effects on living systems. In this paper, the low-cost, eco-friendly, and abundant geoadsorbent natural manganese ore sand was used as an attractive material to remove methylene blue. The results indicated that the poorly crystalline manganese ore sand could simultaneously adsorb and degrade methylene blue. The pseudo-first-order and MnOII (I) kinetic models could describe the decolorization, but the latter had better predictive characteristics. The kinetics were affected by coexisting substances, but a decolorization efficiency of greater than 80% still could be achieved in actual water matrices. Characterization of manganese ore sand before and after use indicated that the degradation processes that occurred at pH values of 2, 3, 5, 7, and 10 included direct and indirect redox reactions. Specifically, the manganese ore sand behaved primarily as an oxidant at acidic pH, as a catalyst at alkaline pH, and simultaneously as oxidant and catalyst at a neutral pH. Possible degradation routes were proposed based on the suggested intermediates. The main behavior of the oxidant was demethylation of C–CH 3 from methylene blue, and the degree of demethylation increased with decreased pH. As the catalyst, the C–N and C–S bonds on the central heterocycle could be further broken by manganese ore sand after demethylation. The performance of manganese ore sand is related to the content of high-valent Mn species.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yumei Tan,Xinyan Lv,Wenwen Wang,Canyu Cui,Yiran Bao,Shihui Jiao
Polydopamine coated hydrogen titanate nanowires (PDA-HTN) are prepared via dopamine self-polymerization. The obtained PDA-HTN is a cheap adsorbent for selective adsorption of methylene blue (MB). The adsorption characteristics of PDA-HTN are studied from three aspects: isotherm, kinetics and thermodynamics. Date show that PDA-HTN adsorbs MB spontaneously, and the adsorption process is agreement with the fitting results of Langmuir and pseudo-second-order model. PDA-HTN is used to selectively adsorb MB from dye mixtures, the removal rate of MB can reach as high as 99.8% and adsorption capacity can reach 241.3 mg g −1 . PDA-HTN can be used to adsorb MB in 0.5 mol L −1 NaCl solution, and the increase of ionic concentration in NaCl solution will improve the adsorption performance of PDA-HTN for MB, because salt ions will induce the dimerization of MB. PDA-HTN exhibits excellent cyclic adsorption property, the removal rate of MB remains above 97.7% after 12 cycles of adsorption-desorption. The adsorption is explained by cooperative effects of π–π stacking, electrostatic interaction, 1,4–Michael addition reaction and hydrogen bonding. Compared to the pristine HTN, the adsorption capacity of PDA-HTN for MB is greatly increased. In addition, PDA-HTN can also be used to remove other cationic dyes, and its adsorption capacity for basic yellow 1 (BY1) and crystal violet (CV) is 586.7 mg g −1 and 865.1 mg g −1 , respectively.
✓ 已验证
产品关联
DOI
高影响因子
SN Applied Sciences
·
2018
·Vol. 1
·期 1
·1-11
·
IF 0
Huang Yangfan,Zhu Jiameng,Liu Huie,Wang Zhenyou,Zhang Xiuxia
The graphene oxide (GO) and modified carbon nanotubes (MCNTs) were dispersed in water and mixed with toluene to form homogeneous emulsion, then the porous graphene–carbon nanotubes composites (MCG) were prepared through hydrothermal reaction. The adsorption mechanism of MCG was investigated by adsorption methylene blue. The morphology of MCG was analyzed by scanning electron microscope and transmission electron microscopy. It was found that MCG had rich micropore structures and MCNTs were interlaced on graphene sheets. The pore size of MCG can be effectively controlled by changing the volume ratio of toluene to the GO/MCNTs solution in the emulsion. MCG was characterized by X-ray diffractometer, Raman spectrometer, X ray photoelectric instrument and other analytical instruments. It was found that MCG had more oxygen functional groups. The experimental results show that kinetics can be well-described by pseudo-second-order model. The smaller the pore size, the higher the equilibrium adsorption capacity and the slower the adsorption rate. The adsorption thermodynamic parameters show that the adsorption process is spontaneous and belongs to physical adsorption, and high temperature is beneficial to adsorption. The fitting results of MCG-5 equilibrium adsorption data are matched with the Langmuir model and the saturated adsorption capacity is 232 mg g −1 . After five cycles of adsorption–desorption operation, the adsorption capacity of MCG-5 decreases slightly.
✓ 已验证
产品关联
DOI
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Wen Xue,Yang Hu,Fujun Wang,Xudong Yang,Lu Wang
High specific-surface-area porous poly(caprolactone) (PCL) membranes combined with Fe 3 O 4 nanoparticles were fabricated by electrospinning technology. Their applications as catalysts in Fenton reactions to degrade methylene blue (MB) were evaluated in the presence of H 2 O 2 and UV light . The results indicated that the fibrous catalyst system illustrated efficient MB removal performance (99% of MB degradation rate) and was viable after 6 cycles (96% of MB degradation rate). Besides, the morphology, chemical composition , magnetic and mechanical properties were also accessed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, magnetometry , and strain-stress curves. The outstanding catalytic behaviors of the composites are attributed to synergy of porous surface and embedded Fe 3 O 4 nanoparticles. It also shows advantages of being environment-friendly and separated easily without an external magnetic field.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Yuan Lei,Yi Cui,Qiang Huang,Jibo Dou,Defu Gan,Fengjie Deng,Meiying Liu,Xiancai Li,Xiaoyong Zhang,Yen Wei
Two demensional nanomaterials have attracted increasing research interest for various applications ranging from environmental adsorption, biomedical applications, catalytic degradation and energy storage owing to their high surface areas, facile surface functionalization . In this work, we demonstrated the preparation and environmental adsorption applications of 2D material MXenes through extracting Al layer from Ti 3 AlC 2 in a simpler and safer way. The surface of Ti 3 C 2 was modified with sulfonic groups via aromatic coupling-diazotization. The adsorption behavior and capacity of the Ti 3 C 2 and functionalized Ti 3 C 2 towards methylene blue (MB) were also examined and compared. The successful preparation of Ti 3 C 2 and modified Ti 3 C 2 was characterized by a number of techniques, including scanning electron microscopy (SEM), transmission electron microscope (TEM), Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). The influence of different experiment conditions such as contact time, solution temperature, pH and initial MB concentrations on the adsorption behavior towards MB were also examined. The results demonstrated that sulfonic groups functionalized Ti 3 C 2 (named as Ti 3 C 2 –SO 3 H) exhibited superior removal efficiency for MB. The maximum adsorption capacity of Ti 3 C 2 –SO 3 H towards MB is over four folds that of raw materials. The results of kinetics and isotherms studies demonstrated that experimental data were better described by pseudo-first-order model and Langmuir isotherm adsorption model, respectively. The process of MB onto surface of adsorbents was endothermic and spontaneous. Experimental details about pH indicated that the dye adsorption capability is favorable when the aqueous solution is alkaline. Based on the above results, cationic dye molecules were removed effectively by using Ti 3 C 2 –SO 3 H as adsorbent, which promotes the development of Ti 3 C 2 –SO 3 H for wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2018
·Vol. 15
·期 2
·239
·
IF 2.145
Lin Ma,Chunhai Jiang,Zhenyu Lin,Zhimin Zou
Biosorption using agricultural wastes has been proven as a low cost and efficient way for wastewater treatment. Herein, grape peel treated by microwave- and conventional-hydrothermal processes was used as low cost biosorbent to remove methylene blue (MB) from aqueous solutions. The adsorption parameters including the initial pH value, dosage of biosorbents, contact time, and initial MB concentration were investigated to find the optimum adsorption conditions. The biosorbent obtained by microwave-hydrothermal treatment only for 3 min at 180 °C (microwave-hydrothermal treated grape peel, MGP) showed faster kinetics and higher adsorption capability than that produced by a conventional-hydrothermal process (hydrothermal treated grape peel, HGP) with a duration time of 16 h. The maximum adsorption capability of MGP under the optimum conditions (pH = 11, a dosage of 2.50 g/L) as determined with the Langmuir model reached 215.7 mg/g, which was among the best values achieved so far on biosorbents. These results demonstrated that the grape peel treated by a quick microwave-hydrothermal process can be a very promising low cost and efficient biosorbent for organic dye removal from aqueous solutions.Keywords:grape peel;biosorbent;biosorption;methylene blue;wastewater treatment
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2018
·Vol. 2018
·期 36
·4053-4062
·
IF 2.507
Xiaoyun Chen,Dong-Hau Kuo,Zong-Yan Wu,Hairus Abdullah,Jubin Zhang,Jinguo Lin
Graphical A Cu-based bimetal seleno–sulfide catalyst system with a CuS covellite structure has been developed for organic degradation that even occurs in the dark. Cu Ni SeS-2 showed the fastest degradation of an MB solution (100 mL, 10 ppm) in 5 min, but Ni -free Cu Se S did not have good catalytic activity. The Cu 2+ /Cu + ratio, oxygen vacancy, and S 6+ are correlated to perform good dye degradation. In order to overcome the photocatalytic degradation reaction with a need for light excitation, the exploration of a catalyst for the organic degradation reaction without light has become one of the core challenges in catalysis and pollution control. Here we report a novel Cu NiSe S nanosheet catalyst with a hexagonal structure by a feasible preparation method. The structure and composition of Cu NiSe S were well characterized by X-ray diffractometry and electron microscopy, and X-ray photoelectron spectrometry, respectively. The result indicated that the best Cu NiSe S-2 of 25 mg displayed excellent activity even in the dark to complete the degradation of 100 mL of MB solution of 10 ppm within 5 min. This catalyst also showed relatively good stability and durability during the reusability tests. The reasons for the fast MB degradation in the dark were investigated and the reaction kinetic mechanism was proposed.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）