水热法制备镍掺杂ZnS纳米棒的显微组织与光催化性能（英文）
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摘要
采用水热法合成纯ZnS和Ni掺杂ZnS纳米棒。通过X射线衍射(XRD)、高分辨透射电子显微镜(HRTEM)、色散能量分析谱仪(EDS)和紫外可见吸收光谱(UV-Vis)等技术分别研究Ni掺杂对样品的物相结构、形貌、元素组成和光学性能的影响,并通过紫外光照射在水溶液中降解有机染料罗丹明B(RhB)研究Zn_(1-x)Ni_xS纳米棒的光催化活性。结果表明:所有样品具有纤锌矿结构,结晶良好。样品的形貌均为一维纳米棒结构,分散性较好,晶格常数发生畸变。掺杂Zn_(1-x)Ni_xS的带隙小于纯ZnS的,因此,发生红移现象。Ni掺杂ZnS纳米材料能增强降解有机染料罗丹明B的光催化活性,尤其是Zn_(0.97)Ni_(0.03)S样品对罗丹明B具有较好的光催化性能和光催化稳定性。
Pure ZnS and Ni~(2+)-doped ZnS nanorods(Zn_(1-x)Ni_xS, x=0, 0.01, 0.03, 0.05 and 0.07, mole fraction, %) were synthesized by hydrothermal method. The effects of Ni~(2+) doping on the phase-structure, morphology, elemental composition and optical properties of the samples were investigated by X-ray diffraction(XRD), high-resolution transmission electron microscopy(HRTEM), X-ray energy dispersive spectrometry(EDS) and ultraviolet–visible spectroscopy(UV-Vis), respectively. The photocatalytic activity of Zn_(1-x)Ni_xS nanorods was evaluated by the photodegradation of organic dyes Rhodamine B(RhB) in aqueous solution under UV light irradiation. The results show that all samples exhibit wurtzite structure with good crystallization. The morphologies are one-dimensional nanorods with good dispersion, and the distortion of the lattice constant occurs. The band gap of Zn_(1-x)Ni_xS samples is smaller than that of pure ZnS, thus red shift occurs. Ni~(2+)-doped ZnS nanocrystals can enhance photocatalytic activities for the photodegradation of RhB. Especially, Zn_(0.97)Ni_(0.03)S sample exhibits better photocatalytic performance and photocatalytic stability for the decomposition of RhB.
Pure ZnS and Ni~(2+)-doped ZnS nanorods(Zn_(1-x)Ni_xS, x=0, 0.01, 0.03, 0.05 and 0.07, mole fraction, %) were synthesized by hydrothermal method. The effects of Ni~(2+) doping on the phase-structure, morphology, elemental composition and optical properties of the samples were investigated by X-ray diffraction(XRD), high-resolution transmission electron microscopy(HRTEM), X-ray energy dispersive spectrometry(EDS) and ultraviolet–visible spectroscopy(UV-Vis), respectively. The photocatalytic activity of Zn_(1-x)Ni_xS nanorods was evaluated by the photodegradation of organic dyes Rhodamine B(RhB) in aqueous solution under UV light irradiation. The results show that all samples exhibit wurtzite structure with good crystallization. The morphologies are one-dimensional nanorods with good dispersion, and the distortion of the lattice constant occurs. The band gap of Zn_(1-x)Ni_xS samples is smaller than that of pure ZnS, thus red shift occurs. Ni~(2+)-doped ZnS nanocrystals can enhance photocatalytic activities for the photodegradation of RhB. Especially, Zn_(0.97)Ni_(0.03)S sample exhibits better photocatalytic performance and photocatalytic stability for the decomposition of RhB.
引文
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[2]WANG Jia-jia,TANG Lin,ZENG Guang-ming,ZHOU Yao-yu,DENG Yao-cheng,FAN Chang-zheng,GONG Ji-lai,LIU Ya-ni.Effect of bismuth tungstate with different hierarchical architectures on photocatalytic degradation of norfloxacin under visible light[J].Transactions of Nonferrous Metals Society of China,2017,27:1794-1803.
[3]ZHAO Wen-hua,WEI Zhi-qiang,WU Xiao-juan,ZHANG Xu-dong,ZHANG Li,WANG Xuan.Cr doped SnS2 nanoflowers:preparation,characterization and photocatalytic decolorization[J].Materials Science in Semiconductor Processing,2018,88(4):173-180.
[4]ZHAO Xin-xin,YANG Hua,LI Shuai-hu,CUI Zi-ming,ZHANGCai-rong.Synthesis and theoretical study of large-sized Bi4Ti3O12square nanosheets with high photocatalytic activity[J].Materials Research Bulletin,2018,107:180-188.
[5]HOROZ S.Effect of Eu2+doping on structural,optical,magnetic and photovoltaic properties of Zn S quantum dots[J].Superlattices and Microstructures,2017,111:1043-1049.
[6]LIU Kui-li,LI Ji-tao,LIU Quan-tao,MENG Ming,HU Ling-wei,XU Chun-xiang.Two-photon absorption induced photoluminescence from ZnS nanowires[J].Journal of Alloys and Compounds,2017,718:122-125.
[7]VIRPAL,KUMAR J,THANGARAJ R,SHARMA S,SINGH R C.Enhanced dielectric permittivity and photoluminescence in Cr doped ZnS nanoparticles[J].Applied Surface Science,2017,416:296-301.
[8]CAI Dong,YUAN Xi,ZHU De-hua,ZHOU Hong-ming,LIHai-bo,ZHAO Jia-long.Al-doped ZnS shell as a surface shield for enhancing the stability of Cu:ZnInS/ZnS/ZnS:Al quantum dots and their application in light emitting diodes[J].Materials Research Bulletin,2017,94:241-246.
[9]SAHRAEI R,MOHAMMADI F,SOHEYLI E,ROUSHANI M.Synthesis and photoluminescence properties of Ru-doped Zn Squantum dots[J].Journal of Luminescence,2017,187:421-427.
[10]CHEN S Q,ZAEIMIAN M S,MONTEIRO J,ZHAO J L,MAMALIS A G,DE BETTENCOURT-DIAS A,ZHU X S.Mn doped AIZS/ZnS nanocrystals:Synthesis and optical properties[J].Journal of Alloys and Compounds,2017,725:1077-1083.
[11]TRUNG D Q,THANG P T,HUNG N D,HUY P T.Structural evolution and optical properties of oxidized ZnS microrods[J].Journal of Alloys and Compounds,2016,676:150-155.
[12]JOTHIBAS M,MANOHARAN C,JOHNSON JEYAKUMAR S,PRAVEEN P,KARTHARINAL PUNITHAVATHY I,PRINCERICHARD J.Synthesis and enhanced photocatalytic property of Ni doped ZnS nanoparticles[J].Solar Energy,2018,159:434-443.
[13]BAI Jin-wu,LI Yun,JIN Peng,WANG Jun-feng,LIU Lu.Facile preparation 3D ZnS nanospheres-reduced graphene oxide composites for enhanced photodegradation of norfloxacin[J].Journal of Alloys and Compounds,2017,729:809-815.
[14]ZHAO Wen-hua,WEI Zhi-qiang,ZHU Xue-liang,ZHANG Xudong,JIANG Jin-long.Optical and magnetic properties of diluted magnetic semiconductors Zn0.95M0.05S nanorods prepared by hydrothermal method[J].International Journal of Materials Research,2018,109(5):405-412.
[15]ASHOK KUMAR M,MUTHUKUMARAN S.Effect of deposition time on structural,optical and photoluminescence properties of Cd0.9Zn0.1S thin films by chemical bath deposition method[J].Journal of Materials Science:Materials in Electronics,2013,24:2858-2865.
[16]SUBRAMANYAM K,SREELEKHA N,AMARANATHA REDDYD,MURALI G,RAHUL VARMA K,VIJAYALAKSHMI R P.Chemical synthesis,structural,optical,magnetic characteristics and enhanced visible light active photocatalysis of Ni doped Cu Snanoparticles[J].Solid State Sciences,2017,65:68-78.
[17]SREELEKHA N,SUBRAMANYAM K,AMARANATHA REDDYD,MURALI G,RAHUL VARMA K,VIJAYALAKSHMI R P.Efficient photocatalytic degradation of rhodamine-B by Fe doped CuS diluted magnetic semiconductor nanoparticles under the simulated sunlight irradiation[J].Solid State Sciences,2016,62:71-81.
[18]REDDY D A,CHOI J,LEE S,KIM Y,HONG S,KUMAR D P,KIMT K.Hierarchical dandelion-flower-like cobalt-phosphide modified CdS/reduced graphene oxide-MoS2 nanocomposites as a noblemetal-free catalyst for efficient hydrogen evolution from water[J].Catalysis Science&Technology,2016,6:6197-6206.
[19]ISLAM M J,REDDY D A,CHOI J,KIM T K.Surface oxygen vacancy assisted electron transfer and shuttling for enhanced photocatalytic activity of a Z-scheme CeO2-AgI nanocomposite[J].RSC Advances,2016,6:1934-19350.