红景天生物还原法和硼氢化钠还原法制备纳米银对直接蓝15的催化降解性能比较  

Comparison in catalytic degradation of direct blue 15 of silver nanoparticles synthesized by Rhodiola rosea and sodium borohydride

作　　者：胡代花[1,2,3,4] 段小龙 高婷婷 孟丽娜 付锦红 杨旭 HU Daihua;DUAN Xiaolong;GAO Tingting;MENG Lina;FU Jinhong;YANG Xu(College of Bioscience and Bioengineering,Shaanxi University of Technology,Hanzhong,Shaanxi 723000,China;Shaanxi Province Key Laboratory of Bio-resources(Shaanxi University of Technology),Hanzhong,Shaanxi 723000,China;QinLing-Bashan Mountains Bioresources Comprehensive Development C.I.C,Hanzhong,Shaanxi 723000,China;Qinba State Key Laboratory of Biological Resources and Ecological Environment(Shaanxi University of Technology),Hanzhong,Shaanxi 723000,China)

机构地区：[1]陕西理工大学生物科学与工程学院,陕西汉中723000 [2]陕西省资源生物重点实验室(陕西理工大学),陕西汉中723000 [3]陕南秦巴山区生物资源综合开发协同创新中心,陕西汉中723000 [4]秦巴生物资源与生态环境省部共建国家重点实验室(培育)(陕西理工大学),陕西汉中723000

出　　处：《中国科技论文》2022年第12期1376-1382,共7页China Sciencepaper

基　　金：国家级大学生创新创业重点项目(202110720001);陕西省重点研发计划项目(2021NY-154);陕西省教育厅重点实验室资助项目(20JS023)。

摘　　要：为探索纳米银的绿色生物制备及其在染料催化降解中的应用,选用红景天根茎水提取物作为还原剂和稳定剂生物制备红景天纳米银(G-AgNPs),应用NaBH_(4)还原法制备化学纳米银(C-AgNPs),并比较G-AgNPs和C-AgNPs对不同添加比例的直接蓝15(direct blue 15,DB15)和NaBH_(4)的催化降解性能。结果表明:G-AgNPs和C-AgNPs在紫外-可见吸收光谱430 nm和400 nm处分别存在明显的吸收峰,透射电子显微镜结果显示合成G-AgNPs粒径大小分布均匀,呈规则圆球形,粒径约为10 nm。当DB15和NaBH_(4)添加比例为V(DB15)∶V(NaBH_(4))=1∶2时,40℃和60℃合成的G-AgNPs降解率(18 min)分别可达82.24%和81.22%,同比优于C-AgNPs(39.50%)(P<0.05)和空白对照(20.77%)(P<0.05);当DB15和NaBH_(4)添加比例为V(DB15)∶V(NaBH_(4))=2∶1时,60℃合成的G-AgNPs降解率(18 min)为87.34%,优于空白对照(5.73%)(P<0.05),与C-AgNPs(90.53%)无显著差异(P>0.05)。不同温度合成的G-AgNPs对2种添加比例的DB15和NaBH_(4)均具有较好的催化降解活性,其中40、60℃合成的G-AgNPs的降解活性最佳;C-AgNPs对较高添加比例的DB15溶液催化活性较好。In order to explore the green synthesis of silver nanoparticles(AgNPs)and its application in the catalytic degradation of dyes,two kinds of silver nanoparticles(G-AgNPs and C-AgNPs)were synthesized using the aqueous extract of Rhodiola rosea as the green reduction and NaBH_(4) as the chemical reduction agent,respectively.The catalytic degradation of different ratios of direct blue 15(DB15)and NaBH_(4) by G-AgNPs and C-AgNPs was compared.G-AgNPs and C-AgNPs show an intense peak at 430 nm and 400 nm in the ultraviolet-visible(UV-vis)absorption spectrum.The synthesized G-AgNPs are about 10 nm with a uniform distribution and a regular spherical shape identified from transmission electron microscope(TEM)analysis.When the addition ratio of DB15 and NaBH_(4) is V(DB15)∶V(NaBH_(4))=1∶2,the degradation rate of G-AgNPs synthesized at 40℃and 60℃reaches 82.24%and 81.22%after 18 min,respectively,which is superior to C-AgNPs(39.50%)(P<0.05)and blank control(20.77%)(P<0.05).When the addition ratio of DB15 and NaBH_(4) is V(DB15)∶V(NaBH_(4))=2∶1,the degradation rate of G-AgNPs synthesized at 60℃reaches 87.34%after 18 min,which is superior to the blank control(5.73%)(P<0.05)and is insignificantly different to C-AgNPs(90.53%)(P>0.05).G-AgNPs synthesized at different reaction temperatures show catalytic performance for DB15 and NaBH_(4) added in two proportions,among which G-AgNPs synthesized at 40℃and 60℃show higher catalytic activity.The catalytic activity of C-AgNPs to DB15 solution with higher proportion is better.

关 键 词：纳米银 生物合成 红景天 化学合成 直接蓝15 催化降解 

分 类 号：TS190.2[轻工技术与工程—纺织化学与染整工程]