The efficient electrocatalytic and photocatalytic reduction of nitric oxide into ammonia over 0D/3D g-C3N4 quantum dots/3DOMM-TiO2-x heterojunction

Synergism of heterovalent valence state and oxygen vacancy defect engineering in Co/S co-doped TiO2 for nitrogen photoreduction to ammonia

“…56 Compared with TiO 2 , each of the light absorption edges of the TiOS, Co/TiO 2 , and CoTiOS catalysts has a redshift, indicating that the doped CoTiOS catalysts can absorb visible light better to improve the optical properties of the photocatalyst. 57 The band gap is calculated according to the following formula 58 ( αhν ) 1/ n = A ( hν − E g ),where α is the absorbance index and hν is the photon energy. A is a proportionality constant, E g is the semiconductor forbidden bandwidth, and the value of n determines the type of jump, with n = 1/2 indicating a direct jump and n = 2 an indirect jump.…”

Photocatalytic NOx removal and recovery: progress, challenges and future perspectives

“…The direct one-step synthesis of NH 3 from NO is an ideal strategy for transforming waste into valuable resources. While research efforts in NO x reduction reactions (NO x RR) have predominantly focused on enhancing NH 3 synthesis rates, achieving high NO x conversion efficiency remains a crucial yet less explored objective 107,108 . Typically, NO x RR experiments necessitate efficiency tests with high concentrations (>10,000 ppm) of NO to ensure an adequate feedstock for enhancing ammonia production 109 .…”

“…While research efforts in NO x reduction reactions (NO x RR) have predominantly focused on enhancing NH 3 synthesis rates, achieving high NO x conversion efficiency remains a crucial yet less explored objective. 107,108 Typically, NO x RR experiments necessitate efficiency tests with high concentrations (>10 000 ppm) of NO to ensure an adequate feedstock for enhancing ammonia production. 109 However, limited NO conversion persists as a key challenge for the sustainability of the NO-to-NH 3 reduction pathway.…”

A Breakthrough in Photocatalytic Wastewater Treatment: The Incredible Potential of g-C3N4/Titanate Perovskite-Based Nanocomposites

“…The enhanced visible light absorption of g-C 3 N 4 /TNP nanocomposites makes it possible to use more of the solar spectrum, which is advantageous in indoor and low-light settings. Additionally, they outperform conventional photocatalysts in terms of photocatalytic performance thanks to their unique qualities such as high surface area, tunable bandgaps, and effective charge separation [132]. Additionally, the simplicity of synthesis and modification of g-C 3 N 4 /TNP nanocomposites makes it possible to add co-catalysts and dopants or create composite structures to improve their photocatalytic performance [31,35,104,[128][129][130].…”