为了提高纳米ZnO光催化剂的光利用效率,以羊毛蛋白质基生物碳为载体,通过原位沉淀法以不同煅烧时间制备了纳米ZnO/生物碳复合光催化剂。采用扫描电镜、傅里叶变换红外光谱、X射线衍射、荧光发射光谱等对其进行表征,探究了复合光催化剂结构与光催化性能的关系及光热协同催化性能。结果表明,随着煅烧时间的延长,纳米ZnO在生物碳表面的负载量增加,制成率下降;500℃煅烧60min所制备的复合光催化剂对直接桃红12B的光催化降解率最高,为88.9%,降解过程符合准一级动力学模型,20℃时降解速率常数是纳米ZnO的2.2倍,5次循环利用后光催化降解率仍能达到初次使用的89.3%。纳米ZnO/生物碳复合光催化剂具有比纳米ZnO更优异的光热协同催化性能。
In order to improve the light utilization efficiency of nano-ZnO photocatalyst,employing wool protein-based biocarbon as a carrier,nanoscale ZnO/biocarbon composite photocatalysts were fabricated by the in-situ precipitation method at various calcination durations.The composite photocatalysts were characterized via scanning electron microscopy,Fourier transform infrared spectroscopy,X-ray diffraction,and luminescence emission spectrometry.The correlation between the structure of the composite photocatalyst and its photocatalytic performance was investigated,along with the photocatalytic and photothermal synergistic performance.The results demonstrated that as the calcination duration prolonged,the loading of nanoscale ZnO on the biocarbon surface increased,and the yield of the composite photocatalyst decreased.The composite photocatalyst obtained by calcining at 500℃ for 60 minutes exhibited the highest photocatalytic degradation rate of direct red 31,attaining 88.9%.The degradation process conformed to the quasi-first-order kinetic model.The degradation rate constant at 20℃ was 2.2 times that of nanoscale ZnO.After five cycles of reuse,the photocatalytic degradation rate still reached 89.3% of the initial use.The composite photocatalyst possessed superior photothermal synergistic performance compared to nanoscale ZnO.
[1] Ojstrsek A,Primoz V,Fakin D.Adsorption of pollutants from colored wastewaters after natural wool dyeing[J].Materials,2022,15(4):1488-1488.
[2] 彭龙贵,丁治玉,程焕全,等.TiO2负载木质素纤维的制备与光催化降解甲基橙性能研究[J].化工新型材料,2023,51(9):161-167.
[3] Brahim A E,Hanane B,Nadia Z,et al.Cellulose beads supported CoFe2O4:a novel heterogeneous catalyst for efficient rhodamine B degradation via advanced oxidation processes[J].International Journal of Biological Macromolecules,2023,259(P1):128893-128893.
[4] Uji P,Rifky P A,Allyn S P,et al.Enhancement of the ZnO nanotube photoelectron-chemical performance by MXene layer[J].Materials Letters,2023,337(127):133932-133936.
[5] Arsalani N,Bazazi S,Abuali M,et al.A new method for preparing ZnO/CNT nano composites with enhanced photocatalytic degradation of malachite green under visible light[J].Journal of Photochemistry & Photobiology,A:Chemistry,2020,389(2):112207-112207.
[6] Liu W Q,Zhou M,Fu H Q.Design of Ag@ZnO@Ti3C2 MXene heterojunction photocatalyst for enhanced photocatalytic degradation activity of methylene blue and levofloxacin under visible light irradiation[J].Journal of Environmental Chemical Engineering,2023,11(5):26-36.
[7] 张靖楠,钱思桐,袁凯乐,等.TiO2/生物炭复合材料的制备及其光催化降解秸秆的研究[J].粮食与油脂,2023,36(06):109-114,119.
[8] 冯安芯,刘影,汤帅,等.超薄磺酸化垂直介孔二氧化硅膜的制备及选择透过性研究[J].化工新型材料,2022,50(7):256-261.
[9] 葛佳丽,魏菊,赵枭羽,等.棉纤维素基碳微粒的制备及其光热性能[J].上海纺织科技,2024,52(02):54-57.
[10] 任璐,赵超凡,李远志,等.全太阳光谱光热催化降解VOCs的研究进展[J].稀有金属,2023,47(11):1556-1572.
[11] Tomczyk A,Sokolowska Z,Boguta P.Biochar physicochemical properties:pyrolysis temperature and feedstock kind effects[J].Reviews in Environmental Science and Bio/Technology,2020,19(1):191-215.
[12] Mervat F,Mohamed S D E,Mohamed S H.ZnO and C/ZnO catalysts synthesized via plant mediated extracts for photodegradation of crystal violet and methyl orange dyes[J].Journal of Inorganic and Organometallic Polymers and Materials,2023,34(3):930-943.
[13] Luo K,Jiang S,Yang Z,et al.A novel nano-cerium oxide functionalized biochar composite for degradation of organic dye:insight of the photocatalysis mechanism[J].Environmental Science and Pollution Research International,2024,31(19):28658-28670.
[14] Yadav N,Ansari M D,Yadav V B,et al.Metal-free visible-light-mediated organophotoredox catalysis:synthesis of 3-functionalized indole via C—C,C—N bond formation[J].Molecular Diversity,2020,25(2):1-7.
[15] Ma G X,Ning G Q,Wei,et al.S-doped carbon materials:synthesis,properties and applications[J].Carbon,2022,195(3):328-340.
[16] Hessien M,Dana E,Alamer K,et al.Nano ZnO (hexagonal wurtzite) of different shapes under various conditions:fabrication and characterization[J].Materials Research Express,2019,6(8):085057-085057.
[17] 李崇俊,马伯信,霍肖旭.炭/炭复合材料石墨化度的表征(Ⅰ)[J].新型炭材料,1999,14(1):22-28.
[18] Mou H Y,Song C X,Zhou Y H,et al.Design and synthesis of porous Ag/ZnO nanosheets assemblies as super photocatalysts for enhanced visible-light degradation of 4-nitrophenol and hydrogen evolution[J].Applied Catalysis B:Environmental,2018.221(2):565-573.
[19] 刘志生,王建辉,杨海鹏,等.C/ZnO/BiOI的制备及其光催化头孢他啶性能[J].中国给水排水,2023,39(23):75-82.
[20] 陆丽丽,单锐,何明阳,等.新型TiO2/生物炭复合催化剂光催化降解甲基橙[J].太阳能学报,2021,42(04):32-39.
[21] 郭星星,高航,殷立峰,等.光热转换材料及其在脱盐领域的应用[J].化学进展,2019,31(04):580-596.
[22] 王子琪,杨仲卿,方瑞明,等.仿生异质结全太阳光谱催化CO2还原特性研究[J].工程热物理学报,2023,44(11):2924-2933.
基金资助
辽宁省教育厅基本科研项目(LJKZZ20220064)
PDF
