APPLIED CATALYSIS A-GENERAL
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2021
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IF 5.706
Shuzhen Zhou,Jingyi Hao,Mengjie Zhou,Xiaoguang Qiao,Xinchang Pang
The combination of piezoelectric material and ball milling leads to new frontiers in catalysis research. Here we used piezoelectric BaTiO 3 nanoparticles as the additive for the degradation of dye pollutant in solid state in ball milling process. With the assistant of ppm level CuBr 2 and H 2 O 2 , high degradation conversion (> 99%) of dyes can be achieved in short time (10 min). BaTiO 3 nanoparticles became temporarily highly polarized particles during BM process and generated electron-hole. These particles exhibited strong reducing properties and reduced Cu(II) into the active Cu(I) species which can catalyze H 2 O 2 to generate highly active ·O 2– to enhance the dye degradation. In addition to the general applicability for different dyes and larger scales, this BaTiO 3 assist BM process was deduced to be a promising powerful platform for organic pollutant treatment in solid states.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Yaya Wang,Yongqiang Cao,Yingjie Liu,Ping Yang
Increased charge transfer and light absorption as well as large specific surface area are effective ways to improve the catalytic efficiency of photocatalysts . In this paper, barbituric acid , urea and thiourea were separately freeze-dried to form a homogeneous precursor with melamine , followed by thermal polymerization at 750 °C, g-C 3 N 4 was doped successfully with C, N and S. Among them, C-doped g-C 3 N 4 revealed well photocatalytic hydrogen production which reached to 2.45 mmol g −1 h −1 . N-doped g-C 3 N 4 exhibited enhanced photocatalytic degradation properties for organic dye (RhB) which is completely degraded within 8 min while the performance S-doped sample is not satisfied. The introduction of C resulted in planarized sample which has a larger specific surface area and provides more active sites. N doping makes the valence band position moving in the direction of high energy. Thus, holes have stronger oxidizing ability. Accordingly, the effect of C and N ratios in g-C 3 N 4 photocatalysis was fully discussed for more comprehensive understanding of g-C 3 N 4 .
研究领域:
材料科学
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光化学
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DOI
高影响因子
Catalysts
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2022
·Vol. 12
·期 3
·297
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IF 4.501
Dingqing Yang,Jinyang Chen,Xiaomin Hong,Jingying Cui,Lingzhen Li
TiO2/hectorite composite photocatalysts with different molar ratios of lithium, magnesium, and silicon were synthesized by a one-pot hydrothermal method. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), N2adsorption-desorption isotherms, and ultraviolet-visible diffuse reflectance spectra (UV-Vis DRS). When the molar ratio of lithium, magnesium, and silicon was 1.32:5.34:8 (TH-2), the composite showed the highest UV photocatalytic degradation of methylene blue (MB). The apparent rate constant of TH-2 was 0.04361 min−1, which was about 3.12 times that of EVONIK Degussa commercial TiO2of AEROXIDE P25. The improvement of photocatalytic efficiency of the composite was mainly due to its high specific surface area, light trapping ability, and effective separation of electrons (e−) and holes (h+). At the same time, the F element of hectorite is beneficial to the formation of Ti3+in TiO2, thus enhancing the photocatalytic activity. After five cycles, the removal rate of MB with TH-2 still reached 87.9%, indicating its excellent reusability.Keywords:photocatalysis;TiO2;hectorite;one-pot synthesis;degradation of organic dyes
研究领域:
材料科学
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环境科学
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Xiaoming Liu,Yuqi Liu,Nanhao Jin,Yue Zhao,Han Chen,Xinying Wang,Yuebin Feng,Huilong Luo,Wei Li
The sulfate radical-based advanced oxidation processes (SR-AOPs) have been attracting widespread attention due to their high selectivity and oxidative potential in wastewater treatment. The future SR-AOPs depend on the R & D of adequate catalysts with high activity and stability. As emerging catalysts, complexes have shown excellent performance in various fields due to their customisable structures and tunable coordination sites. In this study, a novel mixed ligand Co-CP catalyst, namely {[Co 2 (3,3′-azpd)(4,4′-oba) 2 (H 2 O) 8 ]·2H 2 O} n was assembled by using 3,3′-azopyridine and 4,4′-dicarboxydiphenyl ether as mixed ligands via the solvothermal method. The prepared Co-CP showed remarkable performance in activating peroxymonosulfate (PMS) and degrading organic dyes: it took only 14 min to catalyze the degradation of 97 % RB, 8 min to catalyze the degradation of 96 % MB, and 3 min to catalyze the degradation of 92 % MO. Its catalytic degradation efficiency exceeds that of most reported non-homogeneous catalysts. The experiments showed that the catalyst dosage, PMS concentration and the temperature all play key roles in the PMS activation. Moreover, RB degradation obeyed the pseudo-first order model with rate constant ranging from 0.0217 to 0.4639 min −1 . The prepared Co-CP showed stability after five recycling experiments, indicating that it can serve as a s highly efficient and stable catalyst for generating free radicals (such as ·SO 4 − , ·OH) to further treat organic dyes rapidly and provide more options for future wastewater treatment.
研究领域:
环境化学
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催化科学
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废水处理
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材料化学
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氧化工艺
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2020
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IF 4.3
Yi Cui,Dongao Zhang,Kelin Shen,Siqing Nie,Meiying Liu,Hongye Huang,Fengjie Deng,Naigen Zhou,Xiaoyong Zhang,Yen Wei
MXene has emerged as one of the most interest two-dimensional layered materials that has been extensively explored for various applications. In this work, a novel biomimetic method has been developed for the first time to fabricate Ti 3 C 2 MXene based magnetic Fe 3 O 4 composites that relied on the self-polymerization of dopamine and subsequent mild temperature pyrolysis. We demonstrated that many organic dyes could be rapidly degraded by the MXene-MNPs composites through Fenton reaction with extremely high efficiency. The degradation efficiency could be greater than 97 % under the optimized experimental conditions. Moreover, the catalysts displayed a good recyclable property after five continuous cycles. Electron paramagnetic resonance analysis and quenching results indicated that both OH and O 2 − were the reactive species and involved in the degradation process. Owing to the universality and mild reaction conditions of mussel-inspired biomimetic method, many other multifunctional composites with great research interest could also be fabricated. We also believe that this work will provide some new insights for fabrication of highly efficient catalysts for advanced oxidation processes and exploring the critical roles of polydopamine in advanced oxidation procedures.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2017
·
IF 3.387
Huan Wang,Xueqing Qiu,Weifeng Liu,Dongjie Yang
In this work, a novel lignin-based carbon/ZnO (LC/ZnO) hybrid composite with excellent photocatalytic performance was prepared through a convenient and environment friendly method using alkali lignin (AL) as carbon source. The morphological, microstructure and optical properties of the as-prepared LC/ZnO hybrid composite was characterized with scanning electron microscope (SEM), X-ray diffraction (XRD), Raman and UV–vis. The resulting LC/ZnO hybrid is composed of highly dispersed ZnO nanoparticles embedded on a lignin-based carbon nanosheet, showing excellent photogenerated electrons and holes separation and migration efficiency. The photocatalytic activity of LC/ZnO was much higher than the pure ZnO. The LC/ZnO hybrid composite showed different photocatalytic mechanism for degradation of negative methyl orange (MO) and positive Rhodamine B (RhB). It showed that h + was the main photocatalytic active group during the degradation of MO, ·O 2 − and ·OH were the photocatalytic active groups during degradation of RhB. This reported photocatalyst with selective degradation of positive and negative organic dyes may have a great application prospect for photoelectric conversion and catalytic materials. Results of this work were of practical importance for high-valued utilization of lignin for carbon materials.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2024
·Vol. 26
·期 9
·1-15
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IF 2.1
Yin Yanbing,Zhang Xueli,Jiang Bei,Wang Zhou,Feng Yongming,Li Xueying
Developing efficient catalysts for visible light reactions is vital in the field of photocatalysis. This study focuses on the synthesis of novel ternary composites (α-DMACoPc/TiO 2 /MIL-101 (Fe)) by leveraging the excellent adsorption properties of MIL-101 (Fe), the photosensitizing capabilities of phthalocyanine, and the photocatalytic potential of TiO 2 . The nanocomposites’ structural and optical attributes were thoroughly analyzed. X-ray powder diffraction (XRD) was utilized to showcase the crystalline nature of the composites. Furthermore, Fourier transform infrared (FT-IR) studies confirmed the formation of ternary nanocomposites. Optical absorption investigations demonstrated the tuning of the optical band gap from the UV to the visible range. The results indicated that nearly 94% of the organic material was decomposed after 150 min of exposure to simulated sunlight from a xenon lamp. This high efficiency can be attributed to the synergistic interaction among the composites, enhancing light absorption. The composite’s robust stability was evidenced through cyclic tests. Valuable information was provided to advance the design and synthesis of photocatalysts consisting of metal–organic frameworks synergized with semiconductors. Exploring the possibility of mesoporous materials was based on MOFs for photodegradation of organic pollutants. The photocatalytic degradation of organic pollutants by MOFs mesoporous materials was also investigated. The potential of composite materials in the field of dye degradation of industrial waste is confirmed. The good recycling photocatalytic reusability indicates the promising application of this photocatalyst. Graphical Abstract
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
高影响因子
FERROELECTRICS
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2017
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IF 0.551
Xiao-Juan Zhang
Bi2WO6 photocatalysts were fabricated through a hydrothermal process. The phase, microstructure and photocatalytic activity of the obtained Bi2WO6 photocatalysts were investigated. The XRD and FTIR results indicate that the fabricated Bi2WO6 have an orthorhombic phase. The SEM images demonstrate that the fabricated Bi2WO6 has a hierarchical structure. The hierarchical structure may provide Bi2WO6 microsphers with abundant mesopores and thus afford more active sites for photocatalytic reactions, which can improve the photocatalytic activity of Bi2WO6 photocatalyst. The photocatalytic activity of the fabricated Bi2WO6 was evaluated by the degradation of organic dyes under simulated light irradiation. The degradation efficiency of MO is about 92.6% when the system is irradiated by simulated light for 150 min.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Materials Today Sustainability
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2022
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IF 7.244
Haipeng Sun,Zhen Liu,Xingqiang Liu,Changlin Yu,Longfu Wei
In this paper, adjusting the content of conducting polymer polypyrrole (Ppy), a series of Ppy/Bi 2 MoO 6 microsphere photocatalysts were prepared. The prepared samples were characterized by some advanced physicochemical methods. These results showed that the introduction of Ppy was beneficial to the increase of crystallinity and specific surface area of Bi 2 MoO 6 . In electrochemical tests, the Ppy/Bi 2 MoO 6 microspheres photocatalyst showed the enhanced migration rate of photogenerated carriers and the improved utilization efficiency of photogenerated carriers in comparison with the pure Bi 2 MoO 6 . The Ppy/Bi 2 MoO 6 microspheres photocatalyst exhibited an excellent photocatalytic performance in the degradation of high concentration of Rhodamine B (RhB), and also could efficiently remove the mixed dyes (RhB and methyl orange). Furthermore, the capture experiments reveal that both holes (h + ) and superoxide radicals (·O 2 − ) played an important role in the removal of dyes.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2023
·
IF 3.9
Xiaoyan Zhao,Yongcheng Zhou,Hua Guo,Yuqi Zhai,Xianrui Zou,Donghui Wang
Titanium dioxide (TiO 2 ) has received widespread attention as high stability, low toxicity and costless photocatalyst , but it only exhibits photocatalytic activity under ultraviolet (UV) light. To improve TiO 2 photocatalytic efficiency, Bio-CaCO 3 /WO 3 /TiO 2 /(Ca,Y)F 2 :Tm,Yb was prepared. TiO 2 was combined with upconversion materials, coupled with WO 3 and loaded on oyster shell powder (Bio-CaCO 3 ), which showed that the prepared photocatalyst effectively reduce the band gap of TiO 2 , expand the photoreaction range of the material and avoid agglomeration, thus improving its photocatalytic efficiency and antibacterial efficiency. The photocatalytic degradation efficiency of Bio-CaCO 3 /WO 3 /TiO 2 /(Ca,Y)F 2 :Tm,Yb (50 mg) was 24.32% higher than that of TiO 2 /(Ca,Y)F 2 :Tm,Yb in 90 min. And its antibacterial rates against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) were enhanced by 38.68% and 25.89% compared to TiO 2 /(Ca,Y)F 2 :Tm,Yb, respectively.
研究领域:
材料科学
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环境科学
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生物学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 16
·13271-13289
·
IF 2.779
Yu Xiaochen,Song Zeyu,Dong Xiaoqian,Li Huajian,Liu Haonan,Zhao Baoyan,Ye Ting,Jiang Yinlin,Li Xiaojie,Duan Li,Fan Jibin,Zhao Peng
g-C 3 N 4 and rare earth (RE)-doped (Yb, Nd and Ce) g-C 3 N 4 nanosheets were synthesized by a thermal method. The remarkable effects of RE doping on the structural, morphological, and optical properties of g-C 3 N 4 were investigated using XRD, FT-IR, SEM, BET, XPS, UV–Vis, PL, EIS and Mott–Schottky characterization techniques. The photocatalytic activities of RE doped g-C 3 N 4 nanosheets for different dyes were improved compared with g-C 3 N 4 under visible light irradiation, among which Ce/g-C 3 N 4 showed outstanding performance. Due to the doping of RE, it modulates the electronic structure of pristine g-C 3 N 4 and broadens its optical absorption range. In addition, a possible mechanism of photocatalytic degradation of dyes was propounded by free radical trapping experiments. This work may provide a reference for the rational design of photocatalysts and inspiration for the photocatalytic mechanism.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
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IF 3.7
Lihan Deng,Pengfei Chen,Jin Li
BiOBr nanosheets were loaded onto SnO 2 quantum dots, ZnO nanosheets, and SnO 2 /ZnO-2 (SZ-2) to form different heterojunction photocatalysts by sonochemistry, respectively. The photocatalytic activity of the prepared photocatalysts was evaluated by degrading the target dye Rhodamine B (RhB). The results showed that the degradation efficiency of BiOBr/SnO 2 /ZnO (BSZ) for RhB reached 97.5% at 80 min. The significant increase in catalytic activity of BSZ was attributed to the synergistic and interfacial effects among the three materials. Combined with the radical trapping experiments, it can be concluded that the catalytic mechanism of BSZ as a dual Z-type heterojunction.
研究领域:
材料科学
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环境科学
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化学
✓ 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）