ZIF-8制备原位碳掺杂氧化锌及其光催化性能研究

doi:10.19964/j.issn.1006-4990.2021-0252

摘要/Abstract

摘要：

以ZIF-8为前驱体,采用热解法制备碳掺杂氧化锌。分别研究ZIF-8在350、400、450 ℃下煅烧以及陈化10 min、3 h、24 h对制备原位碳掺杂氧化锌的影响。通过热重（TG）、X射线衍射（XRD）和扫描电镜（SEM）研究样品的形貌和结构;紫外可见漫反射光谱（UV-vis）和光致发光光谱（PL）证明原位碳掺杂氧化锌具有可见光吸收能力和更低的光生载流子复合率;DFT模拟计算表明氧化锌晶格中掺入碳元素能有效减小带隙值。原位碳掺杂氧化锌较纯氧化锌在可见光和紫外光照射下的光催化性能分别提高1.5倍和3.0倍。空穴和羟基自由基是原位碳掺杂氧化锌光催化降解体系的主要活性基团,并由此提出了碳掺杂氧化锌的光催化机理。

关键词: 纳米氧化锌, 碳掺杂, 光催化

Abstract:

The C-doped ZnO was prepared by pyrolysis using ZIF-8 as the precursor.In addition,the effect of calcination at 350,400,450 ℃ and aging for 10 min,3 h,24 h of ZIF-8 on in situ preparation of C-doped ZnO were investigated,re-spectively.The morphology and structure of in situ C-doped ZnO was investigated by thermogravimetric（TG）,X-ray diffrac-tion（XRD） and scanning electron microscopy（SEM）.Moreover,the light absorption ability and the dynamics of charge carrier were studied by the UV-vis diffuse reflectance spectra（UV-vis） and photoluminescence spectra（PL） which demonstrated the in situ C-doped ZnO had visible light absorption ability and lower recombination rate of photogenerated carriers.DFT sim-ulation showed that the bandgap value could be effectively reduced by doping C element in the ZnO lattice.The photocatalytic performance of in situ C-doped ZnO was 1.5 and 3.0 times higher than that of pure ZnO under visible light and UV irradiation,respectively.The hole and hydroxyl radicals were the main reactive groups of the in situ C-doped ZnO photocatalytic degrada-tion system,and thus the photocatalytic mechanism of C-doped ZnO was proposed.

Key words: nano-ZnO, C-doping, photocatalysis

中图分类号:

TQ132.41

左龙涛,李军,金央,班昌胜,陈明. ZIF-8制备原位碳掺杂氧化锌及其光催化性能研究[J]. 无机盐工业, 2022, 54(1): 101-108.

ZUO Longtao,LI Jun,JIN Yang,BAN Changsheng,CHEN Ming. Study on in situ preparation of C-doped ZnO by ZIF-8 and its photocatalytic properties[J]. Inorganic Chemicals Industry, 2022, 54(1): 101-108.

图/表 11

图1

图2

图3

图4

图5

图6

图7

图8

图9

图10

图11

参考文献 19

[1]	张荣良, 史爱波, 金云学. 纳米氧化锌的制备与应用研究[J]. 无机盐工业, 2011, 43(10):1-4.
[2]	况怡, 李军, 金央, 等. 液相合成纳米氧化锌及其光催化性能探讨[J]. 无机盐工业, 2019, 51(9):40-44.
[3]	WANG Sheng, ZHU Bicheng, LIU Mingjin, et al. Direct Z-scheme ZnO/CdS hierarchical photocatalyst for enhanced photocatalytic H-2-production activity[J]. Applied Catalysis B:Environmental, 2019, 243:19-26.
[4]	HERNÁNDEZ-ALONSO M D, FRESNO F, SUÁREZ S. Development of alternative photocatalysts to TiO₂:Challenges and opportunities[J]. Energy & Environmental Science, 2009, 2(12):1231-1257.
[5]	LV Jie, ZHANG Chong, WANG Shuangling, et al. MOF-derived po-rous ZnO-Co₃O₄ nanocages as peroxidase mimics for colorimetric de-tection of copper(ii) ions in serum[J]. Analyst, 2021, 146(2):605-611.
[6]	YIN Yilin, LIU Jingchao, WU Zengnan, et al. ZIF-8 calcination de-rived Cu₂O-ZnO* material for enhanced visible-light photocataly-tic performance[J]. New Journal of Chemistry, 2021, 45(6):3095-3101.
[7]	RAN Jingyu, XIAO Lihua, WANG Wei, et al. ZIF-8@polyoxometa-late derived Si-doped ZnWO₄@ZnO nanocapsules with open-shaped structures for efficient visible light photocatalysis[J]. Chemical Co-mmunications, 2018, 54(98):13786-13789.
[8]	XIAO Yang, WANG Xiaoli, YU Hui, et al. MOF-5 derived C-doped ZnO decorated with Cu cocatalyst for enhancing visible-light driven photocatalytic hydrogen evolution[J]. Journal of Physics and Chemi-stry of Solids, 2021, 149.Doi: 10.1016/j.jpcs.2020.109793.
[9]	WANG Yingming, GE Shengsong, CHENG Wei, et al. Microwave hydrothermally synthesized metal-organic framework-5 derived C-doped ZnO with enhanced photocatalytic degradation of Rhodamine B[J]. Langmuir, 2020, 36(33):9658-9667.
[10]	YU Weilai, ZHANG Jinfeng, PENG Tianyou. New insight into the enhanced photocatalytic activity of N-,C- and S-doped ZnO pho-tocatalysts[J]. Applied Catalysis B:Environmental, 2016, 181:220-227.
[11]	WANG Qingbo, ZHOU Cui, CHEN Ling. The optical properties of NiAs phase ZnO under pressure calculated by GGA+U method[J]. Optics Communications, 2014, 312:185-191.
[12]	PEI Guangqing, XIA Changtai, WU Bo. Studies of magnetic interac-tions in Ni-doped ZnO from first-principles calculations[J]. Co-mputational Materials Science, 2008, 43(3):489-494.
[13]	LATHIOTAKIS N N, ANDRIOTIS A N, MENON M. Codoping:A possible pathway for inducing ferromagnetism in ZnO[J]. Physical Review B, 2008, 78(19).Doi: 10.1103/PhysRevB.78.193311.
[14]	HU Cuicui, HU Xiaoxia, LI Rong. MOF derived ZnO/C nanocompo-site with enhanced adsorption capacity and photocatalytic perfor-mance under sunlight[J]. Journal of Hazardous Materials, 2020, 385.Doi: 10.1016/j.jhazmat.2019.121599.
[15]	HUSSAIN M Z, PAWAR G S, HUANG Z. Porous ZnO/carbon na-nocomposites derived from metal organic frameworks for highly efficient photocatalytic applications:A correlational study[J]. Car-bon, 2019, 146:348-363.
[16]	CHEN Meng, WANG Xi, YU Yuehui. X-ray photoelectron spectro-scopy and auger electron spectroscopy studies of Al-doped ZnO films[J]. Applied Surface Science, 2000, 158(1):134-140.
[17]	HSIEH P T, CHEN Yingchuang, KAO Kuosheng. Luminescence mechanism of ZnO thin film investigated by XPS measurement[J]. Applied Physics A, 2008, 90(2):317-321.
[18]	ALSHAMMARI A S, CHI Lina, CHEN Xiaoping, et al. Visible-light photocatalysis on C-doped ZnO derived from polymer-assisted pyrolysis[J]. RSC Advances, 2015, 5(35):27690-27698.
[19]	TAUC J, GRIGOROVICI R, VANCU A. Optical properties and elec-tronic structure of amorphous germanium[J]. Physica Status Soli-di(B), 1966, 15(2):627-637.

首页

全国无机盐信息中心

中国化工学会

无机酸碱盐专业委员会