. Xiaoke Wang, Guangmeng Qu, Shuhua Hao, Gang Zhao, Xixi Zhang, Wenxuan Ma, and Xijin Xu. 2021. “Improvement of Nickel-Cobalt Based Supercapacitors Energy Storage Performance by Modification of Elements.” Journal of Colloid and Interface Science 602: 712–720.
. Shuhua Hao, Lei Zhang, Xiaoke Wang, Gang Zhao, Peiyu Hou, and Xijin Xu. 2021. “Design of Multilayered Porous Aluminum Nitride for Supercapacitor Applications.” Energy & Fuels 35 (15): 12628–12636.
. Wenxuan Ma, Shuhua Hao, Lei Zhang, Baoyi Lv, Gang Zhao, Jinzhao Huang, and Xijin Xu. 2021. “2D WS2 Co-Catalysts Induce the Growth of CdS and Enhance the Photocatalytic Performance.” CrystEngComm 23 (25): 4451–4458.
. Gang Zhao, and Xijin Xu. 2021. “Cocatalysts from Types, Preparation to Applications in the Field of Photocatalysis.” Nanoscale 13 (24): 10649–10667.
. Gang Zhao, Shuhua Hao, Jinghua Guo, Yupeng Xing, Lei Zhang, and Xijin Xu. 2021. “Design of p-n Homojunctions in Metal-Free Carbon Nitride Photocatalyst for Overall Water Splitting.” Chinese Journal of Catalysis 42 (3): 501–509.
. Xixi Zhang, Guangmeng Qu, Zonghua Wang, Guotao Xiang, Shuhua Hao, Xiaoke Wang, Xijin Xu, Wenxuan Ma, and Gang Zhao. 2021. “Hollow Polyhedron Structure of Amorphous Ni-Co-S/Co(OH)2 for High Performance Supercapacitors.” Chinese Chemical Letters.
. Yupeng Xing, Xiaoke Wang, Shuhua Hao, Xueli Zhang, Xiao Wang, Wenxuan Ma, Gang Zhao, and Xijin Xu. 2021. “Recent Advances in the Improvement of g-C3N4 Based Photocatalytic Materials.” Chinese Chemical Letters 32 (1): 13–20.
. Gang Zhao, Yupeng Xing, Shuhua Hao, Xijin Xu, Wenxuan Ma, and Jinghua Guo. 2021. “Why the Hydrothermal Fluorinated Method Can Improve Photocatalytic Activity of Carbon Nitride.” Chinese Chemical Letters 32 (1): 277–281.
. Yunrui Wei, Xixi Zhang, Zonghua Wang, Jiangmei Yin, Jinzhao Huang, Gang Zhao, and Xijin Xu. 2021. “Metal-Organic Framework Derived NiCoP Hollow Polyhedrons Electrocatalyst for PH-Universal Hydrogen Evolution Reaction.” Chinese Chemical Letters 32 (1): 119–124.