Sodium percarbonate(Na_(2)CO_(3)·1.5H_(2)O_(2),SPC)has been extensively employed as a solid substitute of H_(2)O_(2)for Fenton process in water treatment,because of its high stability during the production,transp...Sodium percarbonate(Na_(2)CO_(3)·1.5H_(2)O_(2),SPC)has been extensively employed as a solid substitute of H_(2)O_(2)for Fenton process in water treatment,because of its high stability during the production,transport,storage and usage.In addition,SPC can be applied in a wider range of work pH,it is also applied as a buffer in Fenton reaction for preventing a drop in pH.Herein,we have synthesized basic copper molybdate(BCM)nanoblocks with the molecular formula of Cu_(3)(MoO_(4))_(2)(OH)_(2)as an efficient and heterogeneous catalyst for antibiotics degradation via percarbonate activation.First,fully physical characterizations confirmed BCM nanocomposite exhibited a structure of nanoblocks.We also found that BCM/SPC system could work in a much wider pH range,compared with H_(2)O_(2).Then,BCM/SPC system presented a good anti-interference ability for natural organic matter in OTC degradation.EPR results and Quenching tests confirmed that the co-presence of·CO_(3)-,·O_(2)-,1O_(2)and·OH in BCM/SPC system.展开更多
We report a simple method for preparing copper（II） molybdate（CuMoO_4） powders via a combustion-like process. A gel was first prepared by the polymerizable complex method, where citric acid was used as a complexing...We report a simple method for preparing copper（II） molybdate（CuMoO_4） powders via a combustion-like process. A gel was first prepared by the polymerizable complex method, where citric acid was used as a complexing and polymerizing agent and nitric acid was used as an oxidizing agent. The thermal decomposition behavior of the（CuMo）-precursor gel was studied by thermogravimetry–differential thermal analysis（TG–DTA）, Fourier transform infrared spectroscopy（FTIR）, and X-ray diffraction（XRD）. We observed that the crystallization of CuMoO_4 powder was completed at 450°C. The obtained homogeneous powder was composed of grains with sizes in the range from 150 to 500 nm and exhibited a specific surface area of approximately 5 m^2/g. The average grain size increased with increasing annealing temperature. The as-prepared CuMoO_4 crystals showed a strong green photoluminescence emission at room temperature under excitation at 290 nm, which we mainly interpreted on the basis of the Jahn-Teller effect on [MoO_4^（2-）] complex anions. We also observed that the photoluminescence intensity increased with increasing crystallite size.展开更多
基金Financial support from the NSFC(Nos.21972073,22136003,21805166 and 22206188)the 111 Project of China(No.D20015)and Natural Science Foundation of Hubei Province,China(No.2022CFB275)is gratefully acknowledged。
文摘Sodium percarbonate(Na_(2)CO_(3)·1.5H_(2)O_(2),SPC)has been extensively employed as a solid substitute of H_(2)O_(2)for Fenton process in water treatment,because of its high stability during the production,transport,storage and usage.In addition,SPC can be applied in a wider range of work pH,it is also applied as a buffer in Fenton reaction for preventing a drop in pH.Herein,we have synthesized basic copper molybdate(BCM)nanoblocks with the molecular formula of Cu_(3)(MoO_(4))_(2)(OH)_(2)as an efficient and heterogeneous catalyst for antibiotics degradation via percarbonate activation.First,fully physical characterizations confirmed BCM nanocomposite exhibited a structure of nanoblocks.We also found that BCM/SPC system could work in a much wider pH range,compared with H_(2)O_(2).Then,BCM/SPC system presented a good anti-interference ability for natural organic matter in OTC degradation.EPR results and Quenching tests confirmed that the co-presence of·CO_(3)-,·O_(2)-,1O_(2)and·OH in BCM/SPC system.
基金supported by two French-Moroccan projects: Volubilis Partenariat Hubert Curien (PHC No.MA 09 205)Projet de Recherches Convention Internationale du CNRS (CNRS-CNRST No.w22572)
文摘We report a simple method for preparing copper（II） molybdate（CuMoO_4） powders via a combustion-like process. A gel was first prepared by the polymerizable complex method, where citric acid was used as a complexing and polymerizing agent and nitric acid was used as an oxidizing agent. The thermal decomposition behavior of the（CuMo）-precursor gel was studied by thermogravimetry–differential thermal analysis（TG–DTA）, Fourier transform infrared spectroscopy（FTIR）, and X-ray diffraction（XRD）. We observed that the crystallization of CuMoO_4 powder was completed at 450°C. The obtained homogeneous powder was composed of grains with sizes in the range from 150 to 500 nm and exhibited a specific surface area of approximately 5 m^2/g. The average grain size increased with increasing annealing temperature. The as-prepared CuMoO_4 crystals showed a strong green photoluminescence emission at room temperature under excitation at 290 nm, which we mainly interpreted on the basis of the Jahn-Teller effect on [MoO_4^（2-）] complex anions. We also observed that the photoluminescence intensity increased with increasing crystallite size.
