Energy　shortages　and　global　warming　have　become　two　major　issues　closely　associated　with　the　tremendous　consumption　of　non-renewable　fossil　fuels.　As　a　sustainable　and　economical　route,　photocatalytic　reduction　of　CO2　conversion,　the　so-called　artificial　photosynthesis,　provides　an　alluring　strategy　to　realize　the　twofold　benefits　with　respect　to　closing　carbon　cycle　and　producing　renewable　fuels/chemicals,　thereby　solving　the　above　issues.　TiO2　photocatalysts　have　attracted　widespread　attention　in　CO2　reduction　reactions　owing　to　their　low　cost,　high　stability,　and　environmental　safety.　Nevertheless,　the　limited　absorption　ability　in　the　visible　light　range　and　fast　recombination　of　photogenerated　electrons　and　holes　are　the　two　main　drawbacks　impeding　practical　applications.　This　minireview　summarizes　the　fabrication　methodologies　of　nanostructured　TiO2　(especially　focused　on　the　1D,　2D,　and　3D　nanostructures),　discusses　the　fundamentals　of　photocatalytic　CO2　reduction　to　value-added　chemicals,　and　draws　a　comparison　of　photocatalytic　performances　from　modified　TiO2　nanostructures.　In　further　contexts,　the　opportunities　and　challenges　for　nanostructured　TiO2　based　materials　on　CO2　conversion　are　proposed.　©　2020　Author(s).