There is no requirement for an opamp to have +/- rails. They only have +ve and -ve. The input and output signals must be within a specified range relative to +ve and -ve, but either one can be ground. Some amplifier circuits require split supplies, but for your application that is unnecessary. A simple 10x non-inverting amplifier will rescale your signal from 1.45 V .. 2.5 V. That is probably good enough, but if you need more resolution you can shift the level down and add more gain.