One-Pot Synthesis of W-TiO₂/SiO₂ Catalysts for the Photodegradation of p-Nitrophenol

Table 2

Surface atomic concentration (wt%) obtained from XPS analysis.

Catalyst samples	Surface atomic concentration (wt%)
	Ti2p	O1s	Si2p	W4f
TiO2	60.67	39.33
W-TiO2	56.89	40.01		3.10
W-TiO2/SiO2	28.53	46.57	26.91	1.80