Facile fabrication of perovskite single-crystalline LaMnO3 nanocubes via a salt-assisted solution combustion process

Nanomaterials via solution combustion synthesis: a step nearer to controllability

“…103 However, the as-synthesized alumina was amorphous and the surface area greatly decreased upon the subsequent crystallization procedure. [104][105][106][107] The salts are inexpensive and can be easily removed from the products by water washing. 16 Chen et al is the rst to introduce salts in SCS, which greatly increases the surface area of products in SCS.…”

“…104 The role of salts is believed to be two folds: decreasing the reaction temperature because the salt additives absorb reaction heat; salt precipitated in situ coats the newly formed nanoparticles, preventing them from sintering and agglomerating. [104][105][106][107] The salts are inexpensive and can be easily removed from the products by water washing. For the stoichiometric combustion reaction between nickel nitrate hexahydrate and citric acid, NaF is found to be more effective than NaCl for improving the surface area.…”

Molten Salt Synthesis of Strontium-Doped Lanthanum Manganite Nanoparticles with Enhanced Catalytic Performance for Toluene Combustion

“…Meanwhile, the molten salt synthesis, which could o®er excellent ionic liquid medium for a rapid, low temperature and one-step water free synthesis route for single 13 and mixed oxides, 14,15 have been adopted to prepare some LaMO 3 (M ¼ Mn, Co, Fe, Ni and Al). Chen et al 16 fabricated perovskite single-crystalline LaMnO 3 nanocubes through a facile salt-assisted solution combustion process and discussed the e®ect of molten salt on morphological evolution of LaMnO 3 particles during salt-assisted solution combustion synthesis process. Nevertheless, few literature references were found for the synthesis of LaMnO 3 nanoparticles in molten salts for the catalytic removal of VOCs.…”

Morphologically Controlled Synthesis of Porous Spherical and Cubic LaMnO3 with High Activity for the Catalytic Removal of Toluene

“…As we know, the catalytic activity of LaMnO 3 is associated with its physicochemical properties, including oxygen nonstoichiometry, surface area, morphology, and pore structure. 11−14 Recently, a number of strategies, such as solidstate method, 15 combustion method, 16 sol−gel method, 17 coprecipitation method, 18 hydrothermal synthesis, 19 and biotechnological method, 20 have been developed for the fabrication of ABO 3 with improved physicochemical properties and enhanced catalytic performance. Meanwhile, the molten salt synthesis have been employed to prepare some LaMO 3 (M = Mn, Co, Fe, Ni, Al, Sc, Cr, Ga, and In) with nonuniform morphology due to its lower synthesizing temperature compared with solid-state method.…”

“…Under the conditions of ethanol/oxygen molar ratio = 1/3 and space velocity (SV) = 60 000 h –1 , benzene/oxygen molar ratio = 1/100, and SV = 14 100 h –1 , or toluene partial pressure = 192 Pa and SV = 186 h –1 , the corresponding T 90% was 202, 335, and 310 °C. − Therefore, it is highly desired to improve the catalytic performance of LaMnO 3 (i.e., decreasing the T 90% value). As we know, the catalytic activity of LaMnO 3 is associated with its physicochemical properties, including oxygen nonstoichiometry, surface area, morphology, and pore structure. − Recently, a number of strategies, such as solid-state method, combustion method, sol–gel method, coprecipitation method, hydrothermal synthesis, and biotechnological method, have been developed for the fabrication of ABO 3 with improved physicochemical properties and enhanced catalytic performance. Meanwhile, the molten salt synthesis have been employed to prepare some LaMO 3 (M = Mn, Co, Fe, Ni, Al, Sc, Cr, Ga, and In) with nonuniform morphology due to its lower synthesizing temperature compared with solid-state method. − However, it is rare to come across the literature related to the molten salt synthesis of LaMnO 3 nanostructures with high activity for the catalytic removal of VOCs.…”