High efficiency photocatalytic degradation of indoor formaldehyde by Ag/g-C3N4/TiO2 composite catalyst with ZSM-5 as the carrier

The Application of Bi‐Doped TiO2 for the Photocatalytic Oxidation of Formaldehyde

“…Aggregations of catalyst particles might occur when the loading amounts of the catalysts increased; the aggregated catalyst particles were not excitable by the UV irradiation. [ 44 ] Therefore, the increases in the formaldehyde degradation efficiencies of the catalysts gradually dissipated when the loading amounts of catalysts increased further.…”

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

“…Au nanoparticles can increase the electron concentration onto their surface and enhance and extended adsorption for catalytic activity by its surface π bond [129][130][131]. Ag nanoparticles (AgNPs) are also used to modify the g-C 3 N 4 -TiO 2 heterojunction [132][133][134][135]. The presence of AgNPs not only promotes the visible light response due to the surface plasmon resonance (SPR) effect, but also, they can result in capturing the electrons, to separate them, and transfer them more easily.…”

Emerging and Promising Multifunctional Nanomaterial for Textile Application Based on Graphitic Carbon Nitride Heterostructure Nanocomposites

“…The construction of ternary Ag/TiO 2 /g-C 3 N 4 heterostructures represents a very promising strategy for achieving the enhanced photocatalytic performance of semiconductor nanocomposites under visible light irradiation [ 43 , 45 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 ]. Various approaches for the synthesis of Ag/TiO 2 /g-C 3 N 4 nanocomposites have been reported in the literature.…”

“…Another strategy is to mix previously synthesized TiO 2 and g-C 3 N 4 , followed by the addition of an AgNO 3 precursor and synthesis of Ag NPs in the presence of a g-C 3 N 4 and TiO 2 mixture or previously prepared TiO 2 /g-C 3 N 4 nanocomposite ( Figure 11 b1,b2) [ 45 , 115 , 123 , 124 ]. A TiO 2 /g-C 3 N 4 composite was also prepared by the synthesis of g-C 3 N 4 from a suitable precursor in the presence of TiO 2 or through the synthesis of TiO 2 from a suitable precursor in the presence of g-C 3 N 4 , followed by the synthesis of Ag NPs from an AgNO 3 precursor in a reduction reaction in the presence of TiO 2 /g-C 3 N 4 nanocomposite ( Figure 11 c1,c2) [ 108 , 116 , 117 ]. It has also been reported that the Ag/TiO 2 /g-C 3 N 4 nanocomposite was prepared by synthesis of Ag NPs from an AgNO 3 precursor in the presence of TiO 2 and subsequent mixing of the Ag/TiO 2 nanocomposite with previously synthesized g-C 3 N 4 ( Figure 11 d) [ 43 , 110 , 113 , 118 , 119 , 121 , 122 ].…”

“…Another possible photocatalytic mechanism of Ag/TiO 2 /g-C 3 N 4 involves the Type-II mechanism of the TiO 2 /g-C 3 N 4 heterojunction and Schottky barrier formed at the interfaces of Ag/TiO 2 , Ag/gC 3 N 4 or TiO 2 /Ag/g-C 3 N 4 ( Figure 12 b,c) [ 116 , 117 , 122 , 125 , 126 ]. According to this mechanism, both TiO 2 and g-C 3 N 4 are excited under spectrum solar irradiation, but g-C 3 N 4 mainly absorbs visible light and TiO 2 absorbs UV light.…”