The direct assembly of metalloporphyrin and Mg–Al layered double hydroxides nanosheets: a highly efficient catalyst for the green epoxidation of olefins. - Shen, Chen; Liu, Lin; Ma, Juanjuan; Zhou, Jiadong; Zhang, Shusu; Cheng, Han; Ge, Yuting; Zhang, Tianlin; Tong, Zhiwei; Zhang, Bin (Journal of Materials Science, 2020)