(1. 江西理工大学 冶金与化学工程学院，赣州 341000；
2. 江西理工大学 信息工程学院，赣州 341000)
摘 要: 采用研磨-煅烧法在ZnS中复合不同含量的WO3(0.5%~8%，质量分数)，形成WO3/ZnS异质结光催化剂，利用N2物理吸附、X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、紫外可见漫反射光谱(UV-vis DRS)、红外光谱(FT-IR)、光电子能谱(XPS)和光致发光谱(PL)等对合成的样品进行了表征；考察不同WO3含量样品对ZnS的结晶度、比表面积、表面羟基、光吸收性能的影响，并以λ=254 nm的紫外光为光源，评价该催化剂光催化降解酸性橙Ⅱ的活性，考察WO3复合对WO3/ZnS样品光催化性能的影响。结果表明：WO3的复合可抑制ZnS晶粒在煅烧过程中的长大，同时提高催化剂的比表面积和催化剂表面的羟基数量，并能有效地抑制光生电子与空穴的复合。当复合1%WO3(质量分数)，所制备的WO3/ZnS催化剂的活性最高，比纯ZnS的活性提高了1.8倍。其原因是复合样品具有较好的组织结构的性能，同时，形成的WO3/ZnS异质结有利于光生电子与空穴的分离，从而显著提高光催化剂的脱色活性和稳定性。
关键字: 研磨-煅烧; ZnS；WO3 耦合；异质结；光催化；染料
（1. School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2. School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China）
Abstract:WO3 with different concentrations (0.5%, 1%, 2%, 4%, 8%) were coupled with ZnS by a grinding-calcination method and WO3/ZnS heterostructured photocatalyst was obtained. The prepared samples were characterized by N2- physical adsorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier Transform Infrared spectroscopy (FT-IR), UV-visible spectroscopy, X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) spectroscopy. The photocatalytic activity of the samples was evaluated by photocatalytic degradation of acid orange II under UV light (λ=254 nm) irradiation. The results show that the coupling of WO3 can suppress the growth of ZnS crystals during the process of calcination, increase the surface area and enrich the surface OH groups of the sample. Moreover, the presence of WO3 restrains the recombination rate of photo generated e/h+ pairs. The photocatalytic activity of WO3/ZnS composite photocatalyst with 1% WO3 (mass fraction) increases about 1.8 times than that in pure ZnS. The increase of photocatalytic activity and stability is attributed to the improved texture property. Moreover, the formation of WO3/ZnS heterostructure greatly promotes the separation of e/h+ pairs.
Key words: grinding-calcination; ZnS; WO3 coupling; heterostructure; photocatalytic; dyes
