Activation of persulfate by LaFe1-xCoxO3 perovskite catalysts for the degradation of phenolics: Effect of synthetic method and metal substitution

La2CoO4+δ perovskite-mediated peroxymonosulfate activation for the efficient degradation of bisphenol A

“…Based on the above results, low concentration of HA would facilitate the BPA degradation in the LCO/PMS systems. 30 The removal rate of BPA was inhibited with the presence of 10.0 mg L −1 , which could be ascribed to the scavenging effect of NOM to the free radicals.…”

“…In contrast to the energy-based activation, such as solar/UV, ultrasound, electrical and thermal activation, the catalytic activation is more commonly used due to its low-cost and efficiency in the decomposition of PMS by transition metal ions and heterogeneous catalysts. 26–28 In the SR-AOP systems, many reactive oxygen species, including hydroxyl radicals, singlet oxygen and superoxide, can be generated in the presence of heterogeneous perovskite catalysts, such as La 2 CuO 4+ δ , 29 LaFe 1− x Co x O 3 , 30 LaCoO 3 31 and LaRuO 3 . 32 Moreover, the system of heterogeneous catalyst activated PMS has received more attention, since the separation of heterogeneous catalysts is more feasible and prevent the secondary pollution problem in the homogenous systems.…”

Photocatalytic Degradation of Methylene Blue and Ortho-Toluidine Blue: Activity of Lanthanum Composites LaxMOy (M: Fe, Co, Ni)

“…Another reason could be that the crystallite size of the LaCoO 3 composite (Table 1) contributes towards its high photocatalytic activity as it has been proven that composites with smaller crystallite size and smaller particle size possess higher photocatalytic activity [58]. Furthermore, the excellent catalytic activity can be attributed to the transformation of Co 2+ /Co 3+ redox pairs, as the involvement of superoxide radical ions and oxygen vacancies also favours high catalytic activity [59,60]. The LaFeO 3 composite is the next efficient composite over the LaNiO 3 composite and the reason for this could be that the high crystallinity of LaFeO 3 takes precedence over lattice distortion, which is present in the LaNiO 3 composite and is what is attributed to the LaCoO 3 composite for having higher photocatalytic activity.…”

Integrating multi-method approaches for the green separation and retrieval of nickel and phosphorus from spent electroless nickel plating solutions

“…23,24 PMS can be activated by thermal activation, alkali activation, transition metal activation, and photoactivation to produce sulfate and hydroxyl radicals. [25][26][27][28][29] In the system of removing nickel ions from spent electroless nickel plating solution by chemical precipitation, we can deduce that sodium hydroxide ( precipitating agent) and heating can activate PMS to achieve the purpose of breaking complexation of nickel, and relatively complete oxidation of hypophosphite & phosphite. However, to the best of our knowledge, no studies have been reported on activated PMS for the pretreatment of SENP solution.…”