Figure 10.

a) Polarity on photocatalyst induces fast charge separation and transport. b) Surface defects on photocatalyst leads to faster surface reaction. c) Surface decorated metal nanoparticles increases absorption of solar spectrum. d) Mechanism of photooxidation of methane. Stability of the catalyst for ten cycles. e) Schematic diagrams of photocatalytic instruments a) fixed‐bed and b) flow‐bed reactor that were used for photocatalytic methane conversion.^{[ 143} , ¹⁶³ , ^{162 ]} GC, FID, and TCD are gas chromatograph, flame ionization detector, and thermal conductivity detector, respectively. Reproduced with permission.^{[ 162 ]} Copyright 2016, Springer Nature.