离子交换法制备磷掺杂三氧化钨及光催化降解亚甲基蓝性能

Preparation of phosphorus-doped tungsten trioxide with ionexchange method and photocatalytic degradation of methylene blue

以钨酸钠和磷酸氢二钠为前驱物和磷源,经水热煅烧后,利用离子交换的方法,成功合成了一种高效、稳定的磷掺杂三氧化钨(P-WO_(3))的光催化剂,利用SEM,TEM,XRD,FT-IR分析其形貌结构以及组成,并以P-WO_(3)为催化剂,在可见光下降解处理亚甲基蓝.结果表明,在可见光的照射下,亚甲基蓝质量浓度为10 mg/L,溶液p H为9,催化剂用量为30 mg,在120 min内对亚甲基蓝的降解率可达89.2%,接近于空白WO_(3)的3倍,且P-WO_(3)也表现出较好的稳定性.

A novel phosphorous-doped tungsten trioxide(P-WO_(3))nano-materials are successfully synthesized by utilizing sodium tungstate and disodium hydrogen phosphate as precursor and phosphorus sources via ionexchange method after hydrothermal treatment coupled with post-calcination.The synthesized samplesare systematically characterized with SEM,TEM,XRD and FT-IR technologies.Sequentially,the P-WO_(3) is selected as the photocatalyst for degradation removal of methylene blue(MB).The results indicate that 30 mg P-WO_(3) can lead to 89.2% of the degradation towards 10 mg/L methylene blue at pH of 9 in 120 min under simulated visible light.By comparison,this is almost 3 times enhancement for the photocatalytic removal property of MB than that of the pristine WO_(3).Additionally,the P-WO_(3) photocatalyst possesses better durability.