Enhanced photoelectrochemical and photocatalytic performance of single-crystalline anatase TiO2 (1Â 0Â 1) nanobelts arrays originating from nanotubes arrays

► Anatase TiO2 nanobelts arrays originating from nanotubes arrays were prepared. ► TiO2 nanobelts arrays exhibit higher PEC and PC properties. ► The performance enhanced mechanism was discussed in detail. ► It can be utilized for solar energy conversion and environmental remediation.