Zou JLiao GWang HDing YWu PJYH-PING HSUJiang J.2022-11-162022-11-16202209258388https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128703297&doi=10.1016%2fj.jallcom.2022.165020&partnerID=40&md5=11b482ec1e03b1ce91c0354e87a8209chttps://scholars.lib.ntu.edu.tw/handle/123456789/625311The rational fabrication of an efficient photocatalyst with optimal interface engineering remains a huge challenge for the enhancement of photocatalytic perpformance. Herein, a sequence of multidimensional nanocomposites with different spatial interfaces, including point, and line or face-contact surface are controllable designed by horizontal growing diverse dimensional (0D, 1D,2D and 3D) copper sulfide (CuS) on 2D graphitic-carbon nitride (g-C3N4) nanosheets. Physical and photochemical measurements demonstrate that the formation of an extraordinary 2D/2D face-to-face contact interface can not only enhance the specific surface area, visible light utilization, and photo-excited charge separation efficiency, but also elevate the density and lifetime of photo-generated carriers. The results of ultraviolet photoemission spectroscopy (UPS) and density functional theory (DFT) calculation also confirm that charge transfer tends to occur in face-to-face contact. Among the types of nanocomposites considered, 2D/2D g-C3N4/CuS has the smallest electron transfer barrier (ФBe) between active species, thereby displaying the maximum photocatalytic apparent rate constant, which is about 12 times larger than that of pristine g-C3N4. Most importantly, this work systematically investigates the relationship between microscopic interface structure and photocatalytic activity from the perspective of the optical, and electrical and energy levels, providing a new insight on the rational design of desired interface engineering towards efficient photocatalysts. © 2022 Elsevier B.V.Controllable design; g-C3N4/CuS nanocomposites; Interface engineering; PhotocatalysisCarbon nitride; Charge transfer; Copper compounds; Density functional theory; Design for testability; Image enhancement; Photocatalytic activity; Photoelectron spectroscopy; Rate constants; Sulfur compounds; Contact surface; Controllable design; Face contacts; Face to face; G-C3N4/CuS nanocomposite; Graphitic carbon nitrides; Interface engineering; Line contact; Photo-catalytic; Photochemicals; Nanocompositesjournal article10.1016/j.jallcom.2022.1650202-s2.0-85128703297