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现代化工  2018, Vol. 38 Issue (6): 128-132    DOI: 10.16606/j.cnki.issn0253-4320.2018.06.029
  科研与开发 本期目录 | 过刊浏览 | 高级检索 |
g-C3N4光催化材料的制备及降解水中头孢曲松钠
赵艳艳, 梁旭华, 邓寒霜, 李筱玲
商洛学院生物医药与食品工程学院, 陕西 商洛 72600
Synthesis of g-C3N4 photocatalytic materials and applications in degradation of ceftriaxone sodium
ZHAO Yan-yan, LIANG Xu-hua, DENG Han-shuang, LI Xiao-ling
College of Biology Pharmacy and Food Engineering, Shangluo University, Shangluo 726000, China
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摘要 采用高温煅烧法成功制备了块状g-C3N4和g-C3N4纳米材料,利用XRD、SEM、FT-IR、UV-Vis、PL等方法对材料进行表征,并研究其降解头孢曲松钠的光催化活性和机理。当降解时间为120 min、头孢曲松钠质量浓度为10 mg/mL、半导体材料的加入量为0.1 g时,块状g-C3N4和g-C3N4纳米材料的降解率分别为67.74%和85.84%,g-C3N4纳米材料的光催化活性高于块状g-C3N4;对催化机制研究发现,空穴(h+)和羟基自由基(·OH)起主要催化作用,超氧自由基(·O-2)次之。对g-C3N4纳米材料的稳定性进行评价,3次循环催化后材料稳定性良好。
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赵艳艳
梁旭华
邓寒霜
李筱玲
关键词:  光催化  氮化碳  头孢曲松钠  降解  机理    
Abstract: The overuse and misuse of ceftriaxone sodium is a serious issue threating human and ecological health.It is urgent to explore an effective way to eliminate antibiotic residues from the aquatic environment.Bulk g-C3N4 and nanoscale g-C3N4 photocatalytic materials are prepared successfully via high temperature calcination method,and both are characterized by XRD,SEM,FT-IR,UV-Vis and PL,etc.Photocatalytic degradation of ceftriaxone sodium over the as-prepared g-C3N4 materials under visible light irradiation is carried out to evaluate the catalytic activity and investigate the catalytic mechanism.The results indicate that the degradation rates over bulk g-C3N4 and g-C3N4 nanosheets are 67.74% and 85.84%,respectively when the degradation under visible light irradiation lasts for 120 min,the mass fraction of ceftriaxone sodium is 10 mg·mL-1 and the dosage amount of semi-conductive materials is 0.1 g.The g-C3N4 nanosheets shows much higher photocatalytic activity than bulk g-C3N4.It is found through exploring the catalytic mechanism that h+ and ·OH play major roles in catalytic actions,·O-2 comes next.Moreover,the as-prepared g-C3N4 nanosheets samples are of high stability after three times of uses.
Key words:  photocatalytic    g-C3N4    ceftriaxone sodium    degradation    mechanism
收稿日期:  2017-10-31      修回日期:  2018-04-08           出版日期:  2018-06-20
X131.2  
基金资助: 陕西省教育厅专项科研计划项目(16JK1242);商洛市食品药品监督管理局项目(SFK2016-01-04);陕西欧珂药业有限公司项目(2016HXKY010)
通讯作者:  赵艳艳(1984-),女,博士研究生,讲师,研究方向为环境催化,通讯联系人,ityjd@163.com。    E-mail:  ityjd@163.com
引用本文:    
赵艳艳, 梁旭华, 邓寒霜, 李筱玲. g-C3N4光催化材料的制备及降解水中头孢曲松钠[J]. 现代化工, 2018, 38(6): 128-132.
ZHAO Yan-yan, LIANG Xu-hua, DENG Han-shuang, LI Xiao-ling. Synthesis of g-C3N4 photocatalytic materials and applications in degradation of ceftriaxone sodium. Modern Chemical Industry, 2018, 38(6): 128-132.
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http://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2018.06.029  或          http://www.xdhg.com.cn/CN/Y2018/V38/I6/128
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