Bi/Bi2Fe4O9nanocomposites consisting of Bi2Fe4O9nanosheets decorated with Bi nanodots were synthesized by a hydrothermal method.The formation of Bi nanodots on the Bi2Fe4O9nanosheet surfaces...Bi/Bi2Fe4O9nanocomposites consisting of Bi2Fe4O9nanosheets decorated with Bi nanodots were synthesized by a hydrothermal method.The formation of Bi nanodots on the Bi2Fe4O9nanosheet surfaces was attributed to the reducibility of 2-methoxyethanol in the precursor solution.Comparative photocatalytic evaluation reveals that the Bi/Bi2Fe4O9nanocomposites significantly enhance the degradation efficiency(99.0%)of bisphenol A compared with Bi2Fe4O9nanosheets(64.2%)under 120 min simulated solar irradiation.This remarkable enhancement can be attributed to the established Bi/Bi2Fe4O9heterojunction structure,which effectively facilitates the separation of photogenerated electron-hole pairs and accelerates interfacial charge transfer between the metallic Bi nanodots and semiconductor Bi2Fe4O9nanosheets.The synergistic effects arising from this unique architecture ultimately lead to superior photocatalytic performance.展开更多
Bi_2Fe_4O_9 nanoparticles were prepared at low temperature via a facile, one-step hydrothermal synthesis process using iron(Ⅱ) nitrate nonahydrate(Fe(NO_3)_3·9H_2O) and bismuth nitrate pentahydrate (Bi(NO_3)_3...Bi_2Fe_4O_9 nanoparticles were prepared at low temperature via a facile, one-step hydrothermal synthesis process using iron(Ⅱ) nitrate nonahydrate(Fe(NO_3)_3·9H_2O) and bismuth nitrate pentahydrate (Bi(NO_3)_3·5H_2O) as starting materials and sodium hydroxide (NaOH) as the precipitant and mineralizer. XRD results indicate that the as-prepared nanoparticles are pure Bi_2Fe_4O_9. SEM images reveal that the as-prepared Bi_2Fe_4O_9 nanoparticles have a sheet-like morphology. The Bi_2Fe_4O_9 nanoparticles thus obtained are paramagnetic at room temperature as shown by magnetic measurements.展开更多
基金Funded by the National Natural Science Foundation of China(No.50902108)。
摘要Bi/Bi2Fe4O9nanocomposites consisting of Bi2Fe4O9nanosheets decorated with Bi nanodots were synthesized by a hydrothermal method.The formation of Bi nanodots on the Bi2Fe4O9nanosheet surfaces was attributed to the reducibility of 2-methoxyethanol in the precursor solution.Comparative photocatalytic evaluation reveals that the Bi/Bi2Fe4O9nanocomposites significantly enhance the degradation efficiency(99.0%)of bisphenol A compared with Bi2Fe4O9nanosheets(64.2%)under 120 min simulated solar irradiation.This remarkable enhancement can be attributed to the established Bi/Bi2Fe4O9heterojunction structure,which effectively facilitates the separation of photogenerated electron-hole pairs and accelerates interfacial charge transfer between the metallic Bi nanodots and semiconductor Bi2Fe4O9nanosheets.The synergistic effects arising from this unique architecture ultimately lead to superior photocatalytic performance.
摘要Bi_2Fe_4O_9 nanoparticles were prepared at low temperature via a facile, one-step hydrothermal synthesis process using iron(Ⅱ) nitrate nonahydrate(Fe(NO_3)_3·9H_2O) and bismuth nitrate pentahydrate (Bi(NO_3)_3·5H_2O) as starting materials and sodium hydroxide (NaOH) as the precipitant and mineralizer. XRD results indicate that the as-prepared nanoparticles are pure Bi_2Fe_4O_9. SEM images reveal that the as-prepared Bi_2Fe_4O_9 nanoparticles have a sheet-like morphology. The Bi_2Fe_4O_9 nanoparticles thus obtained are paramagnetic at room temperature as shown by magnetic measurements.
基金the financial supports by the Anhui Provincial Natural Science Foundation (Grant No.1508085MB28)the National Natural Science Foundation of China (Grant No.51372062)~~