Superior three‐dimensional perovskite catalyst for catalytic oxidation

Abstract

Due to the fact that traditional heavy metal‐based catalysts toward wastewater treatment could cause the problem of secondary contamination, it is imperative to seek for more eco‐friendly catalysts to address this tricky issue. Recently, numerous novel metal‐based heterogeneous catalysts, especially perovskite oxides, have been widely investigated for the activation of peroxymonosulfate (PMS), which is significant in the removal of organic pollutants. Here, we report a novel perovskite oxide (La0.7Sr0.3)CoO3‐δ (LSC)‐based 3D ceramic hollow fiber catalyst for aqueous‐phase advanced oxidation. Through it cooperating with PMS, the methylene blue (20 ppm) can be completely degraded only about 30 minutes. The mechanism of advanced oxidation process is explored via the electron paramagnetic resonance test on the active species. In addition, it also displays high activity for the degradation of other pollutes, such as tetrabromobisphenol A and rhodamine B. This study provides a new strategy to effectively degrade contaminant via introducing 3D ceramic catalysts.

Ni nanoparticles‐loaded ZnO nanowire as an efficient and stable catalyst for reduction of 4‐nitrophenol

“…Rapid industrialization brings huge challenges to environment, especially in terms of pollutant emissions, for example, 4-nitrophenol (4-NP), which is a common hazardous waste, has high degree of carcinogenic risk to human. [1][2][3][4][5] It has been listed in the blacklist of priority-controlled pollutants by many environmental organizations including the Environmental Protection Agency of the United States and the China National Environmental Monitoring Centre. The 4-NP is excellently soluble in water, extremely stable, and hardly biodegradable in environment, thus its wastewater treatment has become an urgent problem to be solved in modern society.…”

Recycling Strategies for Solid Oxide Cells

“…Single or multi‐stage leaching could either lead to a recovery of perovskite‐based materials or single element fractions such as REE, which can later be used for SOC applications or comparable applications, such as perovskite‐based catalysts for wastewater treatment or biomass gasification. [ 76,77 ]…”

“…Single or multi-stage leaching could either lead to a recovery of perovskite-based materials or single element fractions such as REE, which can later be used for SOC applications or comparable applications, such as perovskite-based catalysts for wastewater treatment or biomass gasification. [76,77] The preservation of the main fraction in ESC-type cells appears to be possible if the fuel electrode is also separated from the thick electrolyte layer. However, the preserved electrolyte fraction must have a high degree of purity, as contaminants (parts of the functional layers, i.e., the metallic nickel) would certainly lead to reduced performance, especially with regard to electronic leakage.…”

Rational design of Ruddlesden–Popper perovskite electrocatalyst for oxygen reduction to hydrogen peroxide

“…[25][26][27][28][29] These benefits can be ascribed to the low cost of transition metals, 30,31 the high stability of the crystal structure, and flexibility of catalyst design. 32,33 Up to now, perovskite oxide catalysts because of their excellent physical and chemical properties have been applied for catalytic oxidation, 34 membrane technology, [35][36][37] solid electrolytes, 36,38 metal-air batteries, 39 electrochemical hydrogen compressors, 40 solid-state fuel cells, [41][42][43] lithium-sulfur batteries, 44,45 phase transition materials, 46,47 photocatalytic catalysis, 48 photoelectrochemical catalysis. 49,50 oxygen reduction, 51,52 oxygen evolution, 53,54 hydrogen evolution, 55 and nitrogen reduction.…”