Improving the degradation of atrazine in the three-dimensional (3D) electrochemical process using CuFe2O4 as both particle electrode and catalyst for persulfate activation

Designing 3D‐MoS2Sponge as Excellent Cocatalysts in Advanced Oxidation Processes for Pollutant Control

“…Moreover,t his disadvantage may hinder MoS 2 for widespread application in industry.F urthermore,3 D materials have larger specific surface area and hierarchical pore structure,w hich is more conducive to the adsorption of organic pollutants and the electron transport in advanced oxidation process. [11] Therefore,i ti so fi mportant scientific significance and application value to develop al ow-cost 3D-MoS 2 cocatalytic AOPs system for the treatment of industrial wastewater.…”

Catalytic degradation of Acid Orange 7 in water by persulfate activated with CuFe2O4@RSDBC

“…It revealed that AO7 degradation efficiency enhanced with the addition of Cl − . This could be ascribed to may attribute to the active chlorine species generated through reaction between Cl − and reactive radicals which accelerated AO7 degradation, as shown in equations (2)-(4) [44]. Furthermore, it can be seen that the addition of HCO 3 − obviously inhibited AO7 degradation.…”

“…As shown in figure 6, the degradation efficiency of AO7 increased obviously from 59.3% to 95.9% when the catalyst dosage added from 0.2 to 0.8 g l −1 . The increase of catalyst dosage would led to an incremental total surface area and more reactive radicals which would enhance the degradation of AO7 [5,44,46,47]. Nevertheless, a tiny improvement (1.7%) was observed when catalyst dosage increased from 0.6 to 0.8 g l −1 and the degradation efficiency even decreased when the catalyst was added to 1.6 g l −1 .…”

“…In the case of RSDBC, the peak at 1035 cm −1 was corresponding to the Si-O stretching vibration while the peaks at 470-541 cm −1 were assigned to the Si-O bending vibration [29,42]. For the CuFe 2 O 4 @RSDBC, the peak observed at 572 cm −1 were corresponding to the symmetrical stretching of the Fe-O band in the tetrahedral FeO 6 groups of spinel-type compounds [25,38,43,44]. The peaks at 3420-3440 cm −1 were associated with hydroxyl stretching vibration, which were found to be 3432 cm −1 in RSDBC and 3440 cm −1 in CuFe 2 O 4 @RSDBC [45].…”

“…Nevertheless, a tiny improvement (1.7%) was observed when catalyst dosage increased from 0.6 to 0.8 g l −1 and the degradation efficiency even decreased when the catalyst was added to 1.6 g l −1 . This may attribute to agglomeration of excessive CuFe 2 O 4 @RSDBC which resulting in lower catalytic activity [20,44,48]. Also, high concentration of catalyst would release Fe 3+ which generated Fe 2+ by electron transfer, the side reaction between Fe 2+ and sulfate radicals would lead to PS consumption, as described by the following equation (1) [49].…”