Water pollution and energy crisis are two important global issues which have attracted tremendous attention from scientific community. The agricultural sector is one of the primary sources that contribute a variety of micropollutants to aqueous stream. In addition, green H2 production by water splitting is considered as an important technique for renewable energy generation. In recent years, solar light assisted photocatalytic technology has been demonstrated as a sustainable and cost-effective technology to mitigate water pollution and renewable H2 production. Particularly, significant attention has been given to metal organic framework (MOF) based photocatalysts due to their ultrahigh surface area and porosity. In this thesis, a series of visible light active binary/ternary nano-heterostructure materials have been synthesized by integrating Zr-MOF (UiO-66 and UiO-66(-NH2)) with ternary metal sulphides (CdIn2S4, CaIn2S4, MnIn2S4, ZnIn2S4, CuInS2) for potential application in water remediation and activation of atmospheric molecules. In an alternate approach, In-MOFs also have been used as a sacrificial template for synthesis of hollow tubular In2O3 nanorods. The epitaxial growth of MIIIn2S4 on the exposed surface of HT-In2O3 rods led to the formation of hierarchical In2O3/MIIIn2S4 heterojunctions. The synthesized heterojunction materials displayed important attributes including surface sulfur defects, hierarchical structure, superior light harvesting property, effective charge carrier separation and facile charge channelization. The photocatalytic activity of the synthesized hereostructure materials has been studied for aqueous phase mineralization of selected pesticides as well as green H2 evolution, N2 and O2 reduction reactions. The important results obtained from these studies will be presented.