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.
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.
 Lu Z,Zhao X,Zhu Z,et al.Enhanced recyclability,stability,and selectivity of CdS/C@Fe3O4 nanoreactors for orientation photodegradation of ciprofloxacin[J].Chemistry,2015,21:18528-18533.  Junejo Y,Güner A,Baykal A.Synthesis and characterization of amoxicillin derived silver nanoparticles:Its catalytic effect on degradation of some pharmaceutical antibiotics[J].Applied Surface Science,2014,317:914-922.  Lu Z,Zhu Z,Wang D,et al.Specific oriented recognition of a new stable ICTX@Mfa with retrievability for selective photocatalytic degrading of ciprofloxacin[J].Catalysis Science & Technology,2016,6:1367-1377.  Yeung K L,Leung W K,Yao N,et al.Reactivity and antimicrobial properties of nanostructured titanium dioxide[J].Catalysis Today,2009,143:218-224.  焦玉娟,张晓帆,罗冠华,等.改性石墨相氮化碳催化性能的研究进展[J].现代化工,2016,(7):51-55.  焦玉娟,曹慧,耿仁勇,等.石墨相氮化碳改性技术的研究进展[J].现代化工,2016,(4):23-28.  Li J,Liu E,Ma Y,et al.Synthesis of MoS2/g-C3N4 nanosheets as 2D heterojunction photocatalysts with enhanced visible light activity[J].Applied Surface Science,2016,364:694-702.  Ge L,Han C,Liu J.Novel visible light-induced g-C3N4/Bi2WO6 composite photocatalysts for efficient degradation of methyl orange[J].Applied Catalysis B:Environmental,2011,108(1-2):100-107.  刘宗梅,赵朝成,王帅军,等.钾离子掺杂g-C3N4催化剂的制备及其性能研究[J].现代化工,2017,(7):96-99.  Guo X,Wan J,Yu X,et al.Study on preparation of SnO2-TiO2/Nano-graphite composite anode and electro-catalytic degradation of ceftriaxone sodium[J].Chemosphere,2016,164:421-429.  Guo W Q,Zheng H S,Li S,et al.Removal of cephalosporin antibiotics 7-ACA from wastewater during the cultivation of lipid-accumulating microalgae[J].Bioresource Technology,2016,221:284-290.  Guo X,Li D,Wan J,et al.Preparation and electrochemical property of TiO2/Nano-graphite composite anode for electro-catalytic degradation of ceftriaxone sodium[J].Electrochimica Acta,2015,180(39):957-964.  Xu J,Zhang L,Shi R,et al.Chemical exfoliation of graphitic carbon nitride for efficient heterogeneous photocatalysis[J].Journal of Materials Chemistry A,2013,1(46):14766-14772.  李荣荣,姜恒,宫红,等.g-C3N4的制备及其对不同染料光催化降解性能研究[J].应用化工,2016,45(9):1700-1704.  马永宁.单层石墨相氮化碳(g-C3N4)的制备及光催化性能研究[D].西安:西北大学,2014:37-39.  郑猛猛,白照杲,胡芸,等.以不同前驱物制备的g-C3N4与BiVO4的复合光催化剂及其增强的可见光催化性能[J].化工新型材料,2016,44(11):153-162.  Dong M,Wu J,Gao M,et al.Fabrication of Z-scheme g-C3N4/RGO/Bi2WO6 photocatalyst with enhanced visible-light photocatalytic activity[J].Chemical Engineering Journal,2016,290:136-146.  Yu X,Lu Z,Wu D,et al.Heteropolyacid-chitosan/TiO2 composites for the degradation of tetracycline hydrochloride solution[J].Reaction Kinetics Mechanisms & Catalysis,2014,111(1):347-360.