镂空α-氧化铁纳米带制备及其光催化性能研究
收稿日期: 2020-08-12
网络出版日期: 2021-07-08
基金资助
国家自然科学基金(21663009);国家重点研发计划(2018YFC1801706-01);贵州省科技计划项目(黔科合[2020]1Y055);贵州省科技计划项目(黔科合平台人才[2017]5788-56);贵州省科技计划项目(黔科合[2019]2835)
Study on preparation of hollow α-Fe2O3 nanobelts and their photocatalytic properties
Received date: 2020-08-12
Online published: 2021-07-08
采用煅烧三聚氰胺硝酸铁超分子水凝胶前驱体的方法,成功制备了新型镂空纳米带状α-氧化铁(NB-α-Fe2O3)。以NB-α-Fe2O3为光催化剂,讨论了催化剂用量和过氧化氢用量对光催化降解罗丹明B(RhB)的影响,并考察了催化剂的稳定性。通过X射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(HR-TEM)、比表面积测试仪(BET)和X射线光电子能谱仪(XPS)等对α-氧化铁的形貌、结构和组成进行了分析。结果显示,制备的氧化铁属于α晶相,具备较好的结晶度,是由粒径为40~70 nm的颗粒组装成镂空纳米带状结构。通过考察不同催化剂用量和过氧化氢用量对光催化降解RhB效果的影响,发现适宜的催化剂用量为30 mg、过氧化氢用量为0.5 mL。在适宜条件下NB-α-Fe2O3催化剂可见光降解RhB循环4次后降解率仍达到96.8%。制备的NB-α-Fe2O3具有良好的光催化活性与稳定性。
王晨鑫 , 陈美丽 , 田蒙奎 , 杨万亮 . 镂空α-氧化铁纳米带制备及其光催化性能研究[J]. 无机盐工业, 2021 , 53(6) : 185 -189 . DOI: 10.19964/j.issn.1006-4990.2020-0426
A novel hollow nanobelt α-Fe2O3(NB-α-Fe2O3) was successfully prepared by calcination of hydrogel precursor of melamine ferric nitrate supramolecular.Using NB-α-Fe2O3 as photocatalyst,the influence of the amount of catalyst and H2O2 on the performance of photocatalytic degradation of rhodamine B(RhB) were discussed,and the stability of the catalyst was investigated.The morphology,structure and composition of the as-prepared NB-α-Fe2O3 were analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(HR-TEM),surface area tester(BET) and X-ray photoelectron spectroscopy(XPS).The results showed that the prepared iron oxide belonged to α crystal phase and had good crystallinity,and the hollow nanobelt was assembled by α-Fe2O3 particles with 40~70 nm diameter.The effects of different amount of catalyst and hydrogen peroxide on the photocatalytic degradation of RhB were investigated.It was found that the optimal amount of catalyst and hydrogen peroxide were 30 mg and 0.5 mL,respectively.Under suitable conditions,after four cycles of visible light degradation RhB,the degradation efficiency of NB-α-Fe2O3 could still reach 96.8%.The as-prepared NB-α-Fe2O3 had good photocatalytic activity and stability.
Key words: hollow nanobelts; α-Fe2O3; photocatalytic degradation; cycle stability
[1] | Vikrant K, Tsang D C W, Raza N, et al. Potential utility of metal-or-ganic framework-based platform for sensing pesticides[J]. ACS App-lied Materials & Interfaces, 2018,10(10):8797-8817. |
[2] | 梁旭, 贾宇峰, 刘宗怀, 等. 碳海绵上电化学沉积Fe2O3纳米片及其增强电容性能[J]. 物理化学学报, 2020,36(2):157-164. |
[3] | 顾怡红, 张元祥. α-Fe2O3纳米棒的制备及其丙酮气敏性能[J]. 传感技术学报, 2019,32(2):177-182. |
[4] | Wang C, Huang Z. Controlled synjournal ofα-Fe2O3 nanostructures for efficient photocatalysis[J]. Materials Letters, 2016,164:194-197. |
[5] | Joya M R, Ortega J B, Malafatti J O D, et al. Evaluation of photoca-talytic activity in water pollutants and cytotoxic response of α-Fe2O3 nanoparticles[J]. Acs Omega, 2019,4(17):17477-17486. |
[6] | Wang W, Howe J Y, Gu B, et al. Structure and morphology evolution of hematite(α-Fe2O3) nanoparticles in forced hydrolysis of ferric chloride[J]. Journal of Physical Chemistry C, 2008,112(25):9203-9208. |
[7] | Ivanova A, Fominykh K, Fattakhova-Rohlfing D, et al. Nanocellu-lose-assisted formation of porous hematite nanostructures[J]. Inor-ganic Chemistry, 2015,54(3):1129-1135. |
[8] | Takashima T, Hemmi S, Liu Q, et al. Facet-dependent activity of he-matite nanocrystals toward the oxygen evolution reaction[J]. Cataly-sis Science & Technology, 2020,10:3748-3754 |
[9] | Sun T W, Zhu Y J, Qi C, et al. α-Fe2O3 nanosheet-assembled hie-rarchical hollow mesoporous microspheres:Microwave-assisted so-lvothermal synjournal and application in photocatalysis[J]. Journal of Colloid and Interface Science, 2016,463:107-117. |
[10] | Zhang J, Liu X, Wang L, et al. Synjournal and gas sensing properties of α-Fe2O3@ZnO core-shell nanospindles[J]. Nanotechnology, 2011,22(18):185501-185507. |
[11] | Sun H Y, Chen B, Jiao X L, et al. Solvothermal synjournal of tunable electroactive magnetite nanorods by controlling the side reac-tion[J]. Journal of Physical Chemistry C, 2012,116(9):5476-5481. |
[12] | Wang G X, Gou X L, Horvat J, et al. Facile synjournal and charac-terization of iron oxide semiconductor nanowires for gas sensing application[J]. Journal of Physical Chemistry C, 2008,112(39):15220-15225. |
[13] | Zhu L P, Xiao H M, Fu S Y. Template-free synjournal of monodisper-sed and single-crystalline cantaloupe-like Fe2O3 superstructur-es[J]. Crystal Growth & Design, 2007,7(2):177-182. |
[14] | 陆希峰, 朱玲玲, 满杰. α-氧化铁纳米花的合成、表征与气敏性能研究[J]. 无机盐工业, 2017,49(9):35-37. |
[15] | Hao Q G, Mo Z, Chen Z G, et al. 0D/2D Fe2O3 quantum dots/g-C3N4 for enhanced visible-light-driven photocatalysis[J]. Colloids & Surfaces A Physicochemical & Engineering Aspects, 2018,541:188-194. |
[16] | 孟庆华, 朱亦仁, 顾绍玲, 等. 纳米α-Fe2O3合成及光催化法处理染料中间体废水[J]. 无机盐工业, 2011,43(1):48-51. |
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