Enhanced Fenton degradation of Rhodamine B over nanoscaled Cu-doped LaTiO3 perovskite

Abstract

a b s t r a c tCu-doped LaTiO 3 perovskite was prepared with a sol-gel method and characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The introduction of Cu induced the formation of LaTiO 3 perovskite in which titanium existed as Ti 3+ , resulting in the coexistence of Ti 3+/4+ and Cu +/2+ in the perovskite structure. LaTi 0.4 Cu 0.6 O 3 showed highly Fenton activity and stability for the degradation of RhB with H 2 O 2 in the initial pH range of 4-9. Moreover, the catalyst buffered the solution with the tested initial pH to around 7 during the adsorption process. The studies of electron spin resonance, the effect of radical scavengers and other experiments verified that H 2 O 2 was predominately converted into

Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl–SiO2 nanospheres for enhancement of Fenton-catalytic efficiency

“…4a), the obvious binding energy (BE) peak at 935.7 eV accompanied by the appearance of a shake-up satellite line at BE 943.6 eV were attributed to the CuIJII) on the surface of the catalyst. 33 The peak located at 933.4 eV was observed, indicating the existence of the reduction state copper species. 34 The Auger parameters obtained at 1847.3 eV confirmed the reduction state copper species belonging to CuIJI).…”

Enhanced Fenton-like degradation of refractory organic compounds by surface complex formation of LaFeO3 and H2O2

“…9B), which implied that the formation of LaFeO 3 -H 2 O 2 complex was essential and stable for the Fenton reaction process. [30][31][32], a heterogeneous Fenton catalytic mechanism of LaFeO 3 was proposed as follows:…”

Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

“…Hence, the interference from the co-existing UOH in solution should be eliminated before HO 2U /O 2U − detection. (2) HO 2U /O 2U − can also be deduced from the observed scavenging by characteristic quenchers like benzoquinone (Zhang et al, 2012) (Table 2). However, it is almost impossible to distinguish similar organic oxidation products generated by HO 2U /O 2U − attack from UOH attack.…”