The disposal of plastic waste poses major challenges for environmentalists, since plastics are non-biodegradable and release carcinogenic gases when incinerated. It is generally accepted that ultraviolet rays (UV) is an important factor in the photodegradation of organic substances. UV radiation causes photooxidative degradation, which leads to polymer chain breakup, generates free radicals and reduces molecular weight of the polymer causing deterioration of the polymers mechanical properties. Semiconductor photocatalysis has been proven to be an effective technique for the degradation of organic polymers. In the present work, we have addressed the problem degradation of poly (vinyl - chloride) (PVC) by photocatalysis. A PVC sample covered with a zinc oxide (ZnO) thin film synthesized by plasma - enhanced atomic layer deposition (PE - ALD) technique was exposed to UV radiation in the presence of water. The degradation of the sample with synthesized thin film of ZnO and the sample without synthesized thin film of ZnO were comparatively monitored. The degradation was monitored via the relative weight loss data and it was found that the sample with synthesized thin film of ZnO showed higher degradation. After 4 days of UV radiation, the sample with synthesized thin film of ZnO lost 3.45 % relative weight, while the sample without synthesized thin film of ZnO lost 2.61 % relative weight. The samples were characterized by Raman spectroscopy, and elemental analysis was performed using X-ray fluorescence spectroscopy (XRF) to confirm the chlorine content. Infrared Fourier transform spectroscopy (FTIR) was used to study chemical changes in the structure of the samples. FTIR spectroscopy revealed indicators that indicate the degradation of PVC to vinyl chloride. Morphology was observed using optical and scanning electron microscope (SEM). Interesting differences in surface morphology between the two samples were observed.