Preparation of high entropy nitride ceramic nanofibers from liquid precursor for CO₂ photocatalytic reduction

Abstract

Subjected to the manufacturing methods (sputtering or mechanochemical synthesis), the reported high entropy nitrides (HENs) were limited to the forms of coating and powder. Here, we report a novel strategy in preparing HEN ceramic nanofibers (HENCNFs) from liquid precursor via electrospinning followed by high‐temperature NH3 atmosphere nitridation. The as‐prepared HENCNFs include five uniform dispersed metal elements, Ti, Hf, Nb, Ta, and Mo, and have a single face‐centered cubic structure. Interestingly, the obtained HENCNFs show photocatalyst activity in CO2 reduction. The product selectivity of photocatalytic CO2 reduction reaction is 96.4%, and no performance degradation was detected during five cycles photocatalysis test.

Monodispersed hollow ceramic microspheres fabricated based on preceramic polymers and pulse‐controlled coaxial injection

“…Preceramic polymers containing Zr and Si elements (PZS) were synthesized according to the method reported. 24 Briefly, zirconium propoxide and triethoxymethylsilane with a molar ratio of 5:4 were dissolved in n-propanol, and acetylacetone was used as the chelating agent. Deionized water was added to initiate hydrolysis reactions of precursors.…”

Research Progress of High Entropy Materials as Water Electrolysis Catalysts in Recent Years

“…It is worth noting that different surface morphologies of high entropy materials also affect their applications. For example, there is a significant difference in catalytic effect between the powder form [23] and the nanofiber form [24]. This paper compiles the research results of high entropy materials as catalysts for water electrolysis in recent years, analyzes and prospects how to achieve better electrocatalytic performance of high entropy materials, with the hope of bringing more inspiration for the research in this direction.…”

Experimental Investigations into the Pyrolysis Mechanism and Composition of Ceramic Precursors Containing Boron and Nitrides with Different Boron Contents

“…Ceramics are defined as inorganic, nonmetallic materials made up of ionic, covalent, or mixed bonds [ 6 ], and nitride ceramics are kinds of ceramic compounds connected by an inorganic hybrid element-N chemical bond. Nitride ceramics have attracted much attention because of their unique properties [ 7 , 8 ]. The introduction of a nitrogen atom into ceramic structures has significant effects in enhancing their wear, toughness, mechanical properties, and thermo-oxidative stability [ 9 ].…”