(a) Explain how temperature can affect the wavelengths of emission and intensity of a fluorescence spectrum.
[8 marks]
(b) Titanium dioxide is commonly used as a photocatalyst in the remediation of waste-water, self-cleaning windows and other surface-cleaning applications.
(i) Outline the mechanism of metal oxide photocatalysis for the degradation of organic matter on a surface that incorporates a metal oxide film such as titanium dioxide.
(ii) Name two materials that can be added to titanium dioxide to increase its effectiveness as a photocatalyst.