OICC Press Journal of Nanostructure in Chemistry 2193-8865 11 3 (September 2021) 2021 01 03 Horizontally growth of WS2/WO3 heterostructures on crystalline g-C3N4 nanosheets towards enhanced photo/electrochemical performance 10.1007/s40097-020-00373-7 EN Xiao Zhang Fuels and Energy Technology Institute and WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA6845, AU Ping Yang School of Material Science and Engineering, University of Jinan, Jinan, 250022, CN San Ping Jiang Fuels and Energy Technology Institute and WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA6845, AU Journal Article 2021 01 03 Abstract Two-dimensional carbon-based material is attracting considerable attention in exploiting photocatalyst under visible light for photocatalytic energy conversion and storage field, e.g., photocatalytic H 2 production, and photodegradation. Here, WS 2 /WO 3 composites are grown on crystalline graphitic carbon nitride (g-C 3 N 4 ) nanosheets to form heterostructures using a hydrothermal treatment method. While the composition of WS 2 /WO 3 depends on the preparation conditions, the ratio of WS 2 /WO 3 affects the photocatalytic performance of samples. WS 2 /g-C 3 N 4 heterostructures prepared with addition of ascorbic acid reveal enhanced photocatalytic activity due to efficient separation of photogenerated charge carriers. In contrast, sample with relatively low-WS 2 proportion reveals high-H 2 generation performance under visible-light irradiation. Under full solar spectrum irradiation, the average H 2 evolution rate of sample is increased by 5.7 times comparing with that under visible-light test condition. The electrochemical performance of WS 2 /WO 3 /g-C 3 N 4 heterostructures was studied using g-C 3 N 4 with different crystallinity for comparison. With fixed WS 2 /WO 3 /g-C 3 N 4 ratio, crystalline g-C 3 N 4 leads to improved photocatalytic activity of WS 2 /WO 3 /g-C 3 N 4 heterostructures. Sample using g-C 3 N 4 with the highest crystallinity (prepared at 750 ℃) has the highest photodegradation rate and photocurrent response rate comparing with the samples prepared using low-crystalline g-C 3 N 4 substrate. Graphical abstract