Sunlight assisted photocatalytic mineralization of nitrophenol isomers over W6+ impregnated ZnO

- Surface bounded W6+ entities enhance excited states lifetime.
- The W6+ entities promote electrons transfer.
- Superoxide anion radicals are the major contributors in degradation process.
- Degradation of nitrophenols proceeds through ring cleavage.
- Superoxide anion radicals are non-selective in mineralizing substrate.