MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Jiaze Chen,Huijie Xie,Yusen Chen,Dong Guo,Binjie Li,Xuanxuan Sun,Volodymyr Turkevych,Caixia Li,Dehong Chen,Lei Wang,Bin Li
Fenton-like degradation based on iron catalyst have been developed to remove organic pollutants from wastewater. However, iron-based catalysts still face challenges of poor accessibility and stability of active sites. Here, we report a facile and green method for the preparation of Fe x Cu (1-x) @HZSM-5 catalyst using ethylenediamine as an organic ligand to stabilize metal species via a combination of solid-state grinding and steam-assisted crystallization methods without organic templates. Due to the confinement of zeolite ZSM-5 framework and synergistic effect of Fe and Cu bimetals, the optimized Fe 0.8 Cu 0.2 @HZSM-5 catalyst exhibits excellent activity and reusability in the Fenton-like degradation of methylene blue at the neutral condition. Our strategy for fabricating bimetal@zeolite can bring about new thoughts for the preparation of iron-based catalyst with high efficiency for Fenton-like degradation.
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2015
·
IF 3.942
Pei Wu,Xuegang Luo,Sizhao Zhang,Ke Li,Fangwei Qi
A novel photo/thermocatalyst was synthesized using co-precipitation. The catalyst above was used to degrade the dye methylene blue (MB), via the processes of thermocatalytic degradation (TCD) and photo/thermocatalytic degradation (PTCD). The catalysts were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), UV–Vis diffusion reflectance spectroscopy (DRS), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), the Brunauer–Emmett–Teller (BET) technique, and the terephthalic acid photo-luminescence probing technique (TA-PL). Fe-doped Sr 2 Bi 2 O 5 powder was found to exhibit a high thermocatalytic activity and a high photo/thermocatalytic activity for the degradation of MB. The TCD and PTCD MB removal efficiencies reached 92.6 and 98.8%, respectively. Furthermore, HO and O 2 − were not found to be the predominant active radicals. Holes were found to be generated in both two TCD and PTCD; however, TA-PL and radical scavenger experiments indicated that more holes were formed in PTCD. This study discussed the probable thermocatalytic and photo/thermocatalytic mechanisms, finding them to be in good agreement with results.
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DOI
高影响因子
Materials
·
2017
·Vol. 10
·期 4
·373
·
IF 2.654
Xiaoxia Sun,Kunpeng Wang,Yu Shu,Fangdong Zou,Boxing Zhang,Guangwu Sun,Hiroshi Uyama,Xinhou Wang
In this study, novel photocatalyst monolith materials were successfully fabricated by a non-solvent induced phase separation (NIPS) technique. By adding a certain amount of ethyl acetate (as non-solvent) into a cellulose/LiCl/N,N-dimethylacetamide (DMAc) solution, and successively adding titanium dioxide (TiO2) nanoparticles (NPs), cellulose/TiO2composite monoliths with hierarchically porous structures were easily formed. The obtained composite monoliths possessed mesopores, and two kinds of macropores. Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD), Brunauer-Emmett-Teller (BET), and Ultraviolet-visible Spectroscopy (UV-Vis) measurements were adopted to characterize the cellulose/TiO2composite monolith. The cellulose/TiO2composite monoliths showed high efficiency of photocatalytic activity in the decomposition of methylene blue dye, which was decomposed up to 99% within 60 min under UV light. Moreover, the composite monoliths could retain 90% of the photodegradation efficiency after 10 cycles. The novel NIPS technique has great potential for fabricating recyclable photocatalysts with highly efficiency.Keywords:photocatalyst;non-solvent induced phase separation;monolith;cellulose;TiO2
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DOI
PubMed
高影响因子
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.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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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.
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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.
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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.
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高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2016
·Vol. 37
·期 2
·107-112
·
IF 0.631
Xinjian Cheng,Yiru Jia,Jin Qiang,Lei Wen,Chenlong Zhang,Xiao Yang,Liefeng Liang
Nanosized CdS/polymer composite fiber mats were fabricated via a facile electrospinning processing, and the as-prepared composite fiber mats showed excellent photodegradation ability to methylene blue (MB). Polymers bearing N and S atoms with affinity to Cd 2+ ions were first synthesized and then used to prepare CdS/polymer composite fibers. In this work, coaxial electrospinning was employed to achieve the preparation of the desired composite fibers using special polymers as core and cadmium acetate [Cd(CH 3 COO) 2 ] as shell. Then, fiber mats were immersed in thioacetamide (TAA) solution for several minutes, and CdS/polymer composite mats were obtained eventually. The photodegradation catalytic ability was tested using MB as a model dye under sunlight. The photocatalytic efficiency of the CdS/polymer composite fiber mat was recorded and studied by UV-visible spectra, and it showed high efficiency. Nanofiber mats will find real applications in the treatment of wastewater.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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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.
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DOI
高影响因子
KEY ENGINEERING MATERIALS
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2015
·
IF 0
Xin Liu,Yan Ying Zhao
An N, N-dimethylformamide (DMF)-functionalized metal–organic framework, namely, DMF-MIL-101(Cr), was prepared and then used for the adsorptive removal of methylene blue (MB), a cationic dye, from aqueous solutions. MIL-101(Cr) was synthesized by the hydrothermal method. Next, by dipping the MIL-101(Cr) sample in DMF, DMF-MIL-101(Cr) was synthesized. The results of X-ray diffraction analysis, Fourier transform infrared spectroscopy, and thermogravimetric analysis confirmed that DMF and MIL-101 could be combined successfully. More importantly, the MB uptake capacity of DMF-MIL-101(Cr) was significantly higher than that of MIL-101(Cr). Unlike MIL-101(Cr), DMF-MIL-101(Cr) could adsorb the entire MB in a solution with a concentration of 10.92 mg/L, owing to the electrostatic interactions between DMF and the MB molecules. In 100 mL of a 10.92-mg/L MB solution, DMF-MIL-101(Cr) can reach a state of absorbance equilibrium within10 min. After that, the adsorption process exhibited the characteristics of a zero-order reaction. This result indicates that it may be possible to exploit different functionalization methods and improve the rate of adsorption of dyes onto metal–organic frameworks.
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DOI
POLYMER
·
2026
·
IF 5.1
Xiangtai Zhang,Yingxin Wu,Ninghai Wang,Lei Wu
The constraints faced by adsorbents in adsorbing dye wastewater include limited adsorption capacity, difficulties in regeneration with high costs, and the competition for adsorption as well as restrictions on conditions such as pH and temperature, all of which limit their wide application. Here we develop a novel adsorbent AC/Fe 3 O 4 @PDA with high adsorption capacity, rapid adsorption rate as well as magnetic property for efficiently adsorption organic methylene blue (MB). The surface morphology, crystal structure, chemical structure, elementals compositions, pore structure, magnetic property and wettability were all well characterized. It is proposed that an innovative superhydrophilic nanocomposite adsorbent based on highly magnetic and chemically stable biomass nanoparticles are covered by an adsorptive surface layer of PDA. Batch tests were performed to evaluate the influence of temperature, initial pH values, initial MB concentration and time on the performance of the target nanomaterial. The existence of open mesopores and macropores, three-dimensional cavity architecture, super-hydrophilic wettability and abundant amino/hydroxyl functional groups were all beneficial for well contact and chemical firmly bond with water-soluble toxic MB dye. After functionalized by mussel-inspired PDA modification, AC/Fe 3 O 4 @PDA, the active adsorbent could be easily removed from wastewater surface by a magnet. After adsorption, the three-dimensional pores of the carbon skeleton were well maintained. Super-hydrophilic and surface-adhering PDA coating make MB more tightly contact with AC/Fe 3 O 4 @PDA composite at aqueous media. More importantly, this strategy could be easily extended for fabrication of many other highly efficient magnetic adsorbents to solve the removing problem for the environmental applications of mussel inspired chemistry.
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高影响因子
Results in Chemistry
·
2026
·
IF 5.8
Yaning Wang,Jin Yang,Kai Yang,Wen Zhou,Wenshuai Jiang
The 3D porous structure of graphene functional materials possessed characteristics such as high porosity and large specific surface area, enabling dye molecules to easily enter and diffuse within the 3D network, thereby emerging as a promising solution for treating dye wastewater pollution. In this study, reduced graphene oxide@MXene (RGO@MXene) composite hydrogels with a 3D porous structure were prepared using the hydrothermal reduction method with MXene and graphene oxide as raw materials, and their adsorption performance toward methylene blue (MB) was investigated. The RGO@MXene composite hydrogels doped with 20 wt% MXene exhibited the best removal efficiency for MB, showcasing excellent adsorption performance following the introduction of MXene. During the preparation of the composite hydrogels, the introduction of Ca 2+ as a cross-linking agent not only reduced the preparation time but also adjusted the specific surface area and pore size distribution of the hydrogel. Therefore, the RGO@MXene-CaCl 2 composite hydrogels achieved an MB removal rate of 86.25% within a shorter timeframe. The results indicated that the adsorption process conformed to the pseudo-second-order kinetic and Langmuir isotherm models and was heat-absorbing and spontaneous, and the RGO@MXene-CaCl 2 composite hydrogels had an adsorption capacity of up to 1568.6 mg·g −1 for MB. This observation suggested that the adsorption process was influenced by various mechanisms such as external diffusion, surface adsorption, and internal diffusion. In addition, our study showed that the RGO@MXene-CaCl 2 composite hydrogels not only had better reusability, but also exhibited better adsorption for wastewater containing large amounts of inorganic salts.Our study further revealed that the microwave irradiation spectra of 3D RGO@MXene composite aerogels changed before and after MB adsorption, exhibiting characteristic features of RGO or MXene. This finding confirms the adsorption of MB, suggesting a potential new method for its detection. This research demonstrates promising applications in both dye wastewater treatment and the detection of MB.
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高影响因子
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