摘要
采用种子介导法制备得到具有表面等离激元特性的Au纳米球(AuNPs),再通过简单旋蒸方法将其负载于氮化碳(g-C_(3)N_(4))纳米片层材料,制得一系列不同AuNPs负载量的Au/g-C_(3)N_(4)复合材料。得到的复合材料能够有效利用AuNPs的表面等离激元特性,并拓宽g-C_(3)N_(4)在可见光区的光响应能力。将制得的复合材料用于可见光下光催化产氢,测试结果表明,相较于单纯g-C_(3)N_(4)纳米材料,Au/g-C_(3)N_(4)复合材料的光催化产氢活性得到了明显提升,其中,AuNPs负载质量分数为2.5%的Au/g-C_(3)N_(4)样品在催化剂用量为10 mg、且以体积分数20%的三乙醇胺为牺牲剂时光催化产氢活性最优。光电性能测试结果表明AuNPs的引入能够有效促进光生载流子的产生和迁移、抑制电子-空穴对的复合,进而有效提升复合材料的光催化性能。
Plasmonic Au nanospheres(Au NPs)were prepared by seed-mediated method.To fabricate a series of Au/g-C_(3)N_(4) composite materials with different Au NPs loading,Au NPs were supported on g-C_(3)N_(4) nanosheets by means of rotary steaming.The composite material can effectively take advantage of the surface plasmon properties of Au NPs and broaden the light response capability of g-C_(3)N_(4) in the visible light region.The photocatalytic properties of the above nanocomposites were tested by photocatalytic hydrogen production under visible light.Compared with the pure g-C_(3)N_(4) nanomaterials,loading with Au NPs can obviously improve the performance of visible light photocatalytic hydrogen production of nanocomposite materials.Au/g-C_(3)N_(4) with 2.5%(mass fraction)Au NPs exhibits the best photocatalytic hydrogen production activity using 10 mg catalyst and volume fraction 20%of triethanolamine as the sacrificial agent.The photoelectric performance test results show that the introduction of Au NPs can distinctly enhance the generation and migration of photocarriers and inhibit the recombination of electron-hole pairs,thus significantly promoting the photocatalytic performance of the materials.
作者
宁靖
李广芳
陈嵘
赵慧平
NING Jing;LI Guangfang;CHEN Rong;ZHAO Huiping(School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Key Laboratory of Green Chemical Process(Wuhan Institute of Technology),Ministry of Education,Wuhan 430205,China;School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《武汉工程大学学报》
CAS
2022年第5期509-515,共7页
Journal of Wuhan Institute of Technology
基金
国家自然科学基金(21601141)。
