Preparation of CuSe-PDA/g-C 3 N 4 and its visible-light photocatalytic performance to dye degradation
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RESEARCH ARTICLE
Preparation of CuSe-PDA/g-C3N4 and its visible-light photocatalytic performance to dye degradation Maojuan Bai 1 & Chengcheng Xu 1 & Xuanye Huang 1 & Han Yin 1 & Jun Wan 1 Received: 1 January 2020 / Accepted: 6 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract CuSe as an excellent photocatalytic semiconductor material has wildly used in the field of photocatalysis. In this paper, CuSePDA/g-C3N4 was designed and synthesized, and the photocatalytic performance of CuSe was further enhanced by the addition of polydopamine (PDA) and graphite phase carbon nitride (g-C3N4). The as-prepared CuSe-PDA/g-C3N4 was characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and elemental mapping. The specific surface area and porous characteristics of the material were also studied by N2 adsorption-desorption isotherm, which the specific surface area were 186.6 m2/g and pore size were of 3.1 nm by BET data analysis. The photocatalytic conditions for the degradation of methylene blue (MB) by CuSe-PDA/g-C3N4 were optimized in the experiment. The results showed that the photocatalytic performance of CuSe-PDA/g-C3N4 under visible-light illumination were better than CuSe and PDA owing to the narrow band gap energy and delayed electron-hole recombination. Under the optimized conditions, the removal rate reach to 99% of 50 mg/L MB within 60 min irradiation time. Moreover, the MB removal rate was over 90% through six repeated experiments, which proved that the CuSe-PDA/g-C3N4 composite nanomaterials have good stability and reusability. Keywords Photocatalytic . CuSe . Polydopamine . Graphite phase carbon nitride . Degradation wastewater
Introduction With the increasingly serious environmental and resource problems, the photocatalysis has aroused widespread concern. Degradation of organic pollutants in the environment or in water by photocatalytic technology is an inexpensive and feasible way to solve the increasingly serious environmental pollution problems. Most of the traditional photocatalytic materials cannot have high visible light utilization rate and high quantum efficiency at the same time, so a new photocatalyst capable of high visible light utilization, high quantum efficiency, high stability, and low cost is prepared, which has become the frontier and hot spot of the current international photocatalysis technology (Steckel et al. 2006; Coe-Sullivan et al. 2005; Chen et al. 2010; Wang et al. 2012).
Responsible Editor: Sami Rtimi * Jun Wan [email protected] 1
College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Copper selenide is a good P-type semiconductor material and can be combined with N-type semiconductor materials to form a PN junction solar cell structure. Copper selenide is a Ptype semiconductor with a narrow band gap (Riha et al. 2010; Cao et al. 2
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