Constructing Active Sites on Self-Supporting Ti3C2Tx (T = OH) Nanosheets for Enhanced Photocatalytic CO2 Reduction into Alcohols

Ti3C2Tx (T = OH) was first prepared from Ti3AlC2 by HF etching and applied into a photocatalytic CO2 reduction. Then, the nanosheets present interbedded self-supporting structure extended interlayer spacing. Meanwhile, are decorated with abundant oxygen-containing functional groups in process of etching, which not only serve as active sites but also show efficient charge migration separation. Among materials for different times, Ti3C2Tx-36 (Etching time: 36 h) showed best performance photoreduction alcohols (methanol ethanol), giving total yield 61 μmol g catal.−1, is 2.8 times than that Ti3AlC2. Moreover, excellent cycling stability reduction beneficial stable morphology crystalline structure. This work provided novel sights constructing surface controllably.