Synthesis of Fe2O3 loaded porous g-C3N4 photocatalyst for photocatalytic reduction of dinitrogen to ammonia

Novel S-scheme 2D/2D BiOBr/g-C3N4 heterojunctions with enhanced photocatalytic activity

“…Among them, g-C3N4 with its typical 2D structure has become a research hotspot owing to its unique features, such as appropriate energy band, non-toxicity, abundant raw materials, simple synthesis, and good thermal-chemical stability [18][19][20]. g-C3N4 has been widely used for H2 evolution [21,22], CO2 reduction [23], NOx removal [24], organic pollutant degradation, and bacteria inactivation [25][26][27][28]. However, g-C3N4 prepared by the traditional thermal polymerization method has a high recombination rate of photogenerated electrons and holes due to grain boundaries generated by the high-temperature process, thus inhibiting its photocatalytic performance.…”

Recent advances in photocatalytic nitrogen fixation: from active sites to ammonia quantification methods

“…The common photocatalysts, such as g-C 3 N 4 , 5,7 TiO 2 8 and BiOCl, 9 have low nitrogen xation efficiency because of their light absorption range and charge carrier recombination and other problems. Therefore, in recent years, there have been many studies on the modication of these materials, such as doping, 10 building heterojunction, 11 increasing vacancy 12 and other methods to change the semiconductor band gap, 13 promote photogenerated electron-hole separation, 14 and expand the adsorption of N 2 on the catalyst surface. 15 Most of the existing reviews are classied from the chemical composition of photocatalyst 16 or from its structural engineering.…”

Two‐step calcination synthesis of Z‐scheme α‐Fe2O3/few‐layer g‐C3N4 composite with enhanced hydrogen production and photodegradation under visible light

“…[21][22][23] Many studies have confirmed that the properties of α-Fe 2 O 3 make it a good candidate for coupling with other semiconductors to construct Z-type heterojunctions with enhanced photoactivity. [24][25][26][27] For example, Hao and his colleagues prepared quantum-sized α-Fe 2 O 3 on two-dimensional (2D) g-C 3 N 4 by calcinating iron nitrate and 2D g-C 3 N 4 at 200 C. [28] Li et al reported a Z-scheme heterojunction that was constructed by directly calcining a mixture of melamine and ferric nitrate. [29] However, problems, including the low surface area of the as-prepared composite and the uncontrolled particle size and poor dispersion of Fe 2 O 3 , seriously restrict its photocatalytic activity.…”