Templated 2D polymer heterojunctions for improved photocatalytic hydrogen production by Aitchison, CM, Gonzalez-Carrero, S, Yao, S, Benkert, M, Ding, Z, Young, NP, Willner, B, Moruzzi, F, Lin, Y, Tian, J, Nellist, PD, Durrant, JR, McCulloch, I