超声化学制备Cu_2(OH)PO_4及其在染料废水处理中的应用
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摘要
以Cu(NO_3)_2·3H_2O为铜源、NaH_2PO_4·2H_2O和NaOH为构晶离子和碱源,通过一步超声波辅助液相化学法制备了单分散分级结构的Cu_2(OH)PO_4微晶。用X-射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、傅里叶变换红外光谱(FT-IR)和固体紫外-可见漫反射光谱(UV-vis DRS)对所制得Cu_2(OH)PO_4样品进行了结构与光学性质测试。结果表明:制备的Cu_2(OH)PO_4微晶呈准一维的梭形结构,由纳米棒组装而成,纳米棒长度为150～200 nm,直径约为50 nm;其能带约为1.82 eV,具有可见光激发性能。光催化降解实验表明,分级结构的Cu_2(OH)PO_4微晶具有较高的催化活性,可以高效地光催化降解废水中亚甲基蓝和罗丹明B有机染料污染物。
Using Cu(NO_3)_2·3H_2O as copper source, NaH_2PO_4·2H_2O and NaOH as configurational anion and alkaline reagent, monodispersed hierarchical copper-hydroxyphosphate(Cu_2(OH)PO_4) microcrystals have been successfully synthesized via an one-pot ultrasonic-assisted aqueous chemical route. The phase, morphology and optical property of as-prepared Cu_2(OH)PO_4 product are investigated by X-ray diffraction(XRD), field emission scanning microscopy(FESEM), Fourier Transform infrared spectroscopy(FT-IR) and UV-vis diffuse reflectance spectra(DRS). The as-synthesized quasi one dimension Cu_2(OH)PO_4 microcrystals with the lengths of 1.5～2.0 μm are constructed by well-ordered nanorods, having 150～200 nm in length as well as 50 nm in diameter. The band gap energies were estimated to be 1.82 eV, suggesting the visible light response. Photocatalytic results demonstrate that Cu_2(OH)PO_4 microcrystals exhibit higher photocatalytic performance of efficient photocatalytic degradation of organic dyes such as methylene blue(MB) and rhodamine B(RhB) in wastewater.
Using Cu(NO_3)_2·3H_2O as copper source, NaH_2PO_4·2H_2O and NaOH as configurational anion and alkaline reagent, monodispersed hierarchical copper-hydroxyphosphate(Cu_2(OH)PO_4) microcrystals have been successfully synthesized via an one-pot ultrasonic-assisted aqueous chemical route. The phase, morphology and optical property of as-prepared Cu_2(OH)PO_4 product are investigated by X-ray diffraction(XRD), field emission scanning microscopy(FESEM), Fourier Transform infrared spectroscopy(FT-IR) and UV-vis diffuse reflectance spectra(DRS). The as-synthesized quasi one dimension Cu_2(OH)PO_4 microcrystals with the lengths of 1.5～2.0 μm are constructed by well-ordered nanorods, having 150～200 nm in length as well as 50 nm in diameter. The band gap energies were estimated to be 1.82 eV, suggesting the visible light response. Photocatalytic results demonstrate that Cu_2(OH)PO_4 microcrystals exhibit higher photocatalytic performance of efficient photocatalytic degradation of organic dyes such as methylene blue(MB) and rhodamine B(RhB) in wastewater.
引文
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[11]姬磊,于瑞敏,陈丽铎,等.复合光催化剂Cu2(OH)PO4/NiOH的制备及其光催化性能[J].东北石油大学学报,2015,39(4):95-101.
[2]M Hara,T Kondo,M Komoda,et al.Cu2O as a Photocatalyst for Overall Water Splitting under Visible Light Irradiation[J].Chemical Communications,1998(3):357-358.
[3]S Rengaraj,S Venkataraj,C W Tai,et al.Self-assembled Mesoporous Hierarchical-like In2S3 Hollow Microspheres Composed of Nanofibers and Nanosheets and their Photocatalytic Activity[J].Langmuir,2011(27):5534-5541.
[4]J S Xu,D F Xue.Fabrication of Copper Hydroxyphosphate with Complex Architecture[J].Journal of Physical Chemistry B,2006(110):7750-7756.
[5]I S Cho,D W Kim,S W Lee,et al.Synthesis of Cu2PO4OH Hierarchical Superstructures with Photocatalytic Activity in Visible Light[J].Advanced Functional Materials,2008(18):2154-2162.
[6]沈启慧,邹永存,万利丰,等.羟基磷酸铜的快速绿色合成[J].高等学校化学学报,2008,29(7):1331-1333.
[7]吕长和,管航敏,陈红,等.新型催化剂Cu2(OH)PO4的制备及表征[J].安徽化工,2009,35(4):19-21.
[8]詹予忠,周翔,胡斌,等.羟基磷酸铜的合成与表征[J].郑州大学学报(工学版),2010,31(2):76-79.
[9]詹予忠,付蓓,李海龙,等.羟基磷酸铜催化过氧化氢降解酸性染料偶氮藏蓝[J].化工进展,2011(30):348-351.
[10]C H Chen,Y Zhou,N N Wang,et al.Cu2(OH)PO4/g-C3N4 Composite as an Efficient Visible Light-activated Photo-Fenton Photocatalyst[J].RSC Advance,2015(5):95523-95531.
[11]姬磊,于瑞敏,陈丽铎,等.复合光催化剂Cu2(OH)PO4/NiOH的制备及其光催化性能[J].东北石油大学学报,2015,39(4):95-101.