Koutavarapu Ravindranadh, Reddy Ch Venkata, Syed Kamaluddin, Reddy Kakarla Raghava, Shetti Nagaraj P, Aminabhavi Tejraj M, Shim Jaesool
School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
Chemosphere. 2021 Mar;267:128559. doi: 10.1016/j.chemosphere.2020.128559. Epub 2020 Oct 11.
Heterostructured nanohybrids were prepared from sodium bismuth sulfide (NaBiS) and zinc oxide (ZnO) through hydrothermal process. The nanocomposite was used for tetracycline (TC) degradation as well as photoelectrochemical (PEC) water oxidation. Morphology and structural analyses were performed to confirm the dispersion of ultra-small ZnO nanosheets into the NaBiS nanoribbons. By tuning the band gap, it was possible to degrade tetracycline toxic pollutant within 90 min under the simulated solar light irradiation, while PEC suggested a lower charge-transfer resistance, high photocurrent response, and exceptionally good stability. The highest photocurrent density of 0.751 mAcm vs. Ag/AgCl in 0.1 M NaSO solution was observed under solar-light illumination. Detailed photocatalytic mechanisms for the degradation of TC and PEC water oxidation are discussed.
通过水热法由硫化铋钠（NaBiS）和氧化锌（ZnO）制备了异质结构纳米杂化物。该纳米复合材料用于四环素（TC）降解以及光电化学（PEC）水氧化。进行了形态和结构分析，以确认超小ZnO纳米片在NaBiS纳米带中的分散情况。通过调节带隙，在模拟太阳光照射下90分钟内可以降解四环素有毒污染物，而PEC显示出较低的电荷转移电阻、高光电流响应和极佳的稳定性。在太阳光照射下，在0.1 M NaSO溶液中观察到相对于Ag/AgCl的最高光电流密度为0.751 mAcm。讨论了TC降解和PEC水氧化的详细光催化机理。
