The use of photocatalysts for acquiring direct photon energy from sunlight is a promising way to clean the environment, particularly the remediation of contaminants from water. In this work, firstly π-conjugated organic semiconductor configuring benzoselenadiazole, 4-(3,5-bis(trifluoromethyl) phenyl)-7-(5′-hexyl-[2,2′-bithiophen]-5-yl)-benzo [c] (Kümmerer, 2009; Chen et al., 2018; Randeep et al., 201) selenadiazole, abbreviated as (RTh-Se-F), was synthesized. The designed RTh-Se-F with an extended π-conjugation showed good optical properties in the visible region and estimated a low optical band gap of ∼2.02 eV . The molecular orbitals i.e. HOMO (−5.33 eV) and LUMO (−3.31 eV) for RTh-Se-F organic semiconductor were suitably aligned to energy levels of (Madhavan et al., 2010Madhavan et al., 2010)-Phenyl-C₇₁-butyric acid methyl esters (PC₇₁BM) which resulted in the broadening of absorption and covering of entire visible region. RTh-Se-F was integrated with varied weight percentages (wt %) of PC₇₁BM to obtain bulk heterojunction (BHJ) and applied as efficient visible light driven BHJ photocatalyst for an effective oxidation of ibuprofen. RTh-Se-F@PC₇₁BM (1:2, wt %) BHJ photocatalyst showed the superior ibuprofen degradation of ∼93% within 90 min under visible light illumination. The maximum degradation rate by BHJ photocatalyst might be accredited to the broadening of absorption capacity and improved lifetime of photogenerated electron-hole pairs which might be resulted from high absorption properties of RTh-Se-F organic semiconductor.

使用光催化剂从阳光中获取直接光子能量是一种很有前途的清洁环境的方法，特别是修复水中的污染物。本工作首先采用π共轭有机半导体构型苯并硒二唑、4-(3,5-双(三氟甲基)苯基)-7-(5'-己基-[2,2'-联噻吩]-5-基)-苯并[c] (Kümmerer, 2009; Chen et al., 2018; Randeep et al., 201) 合成了硒二唑，缩写为 (RTh-Se-F)。设计的具有扩展 π 共轭的 RTh-Se-F 在可见光区域显示出良好的光学特性，并估计低光学带隙为 ~2.02 eV。_{RTh-Se-F 有机半导体的分子轨道，即 HOMO (-5.33 eV) 和 LUMO (-3.31 eV) 与 (Madhavan et al., 2010Madhavan et al., 2010)-Phenyl-C 71}的能级适当对齐-丁酸甲酯 (PC ₇₁ BM)，导致吸收变宽并覆盖整个可见区域。RTh-Se-F 与不同重量百分比 (wt%) 的 PC ₇₁ BM 结合以获得本体异质结 (BHJ)，并用作高效可见光驱动的 BHJ 光催化剂，用于布洛芬的有效氧化。RTh-Se-F@PC ₇₁ BM (1:2, wt %) BHJ 光催化剂显示在可见光照射下 90 分钟内布洛芬的降解率高达 93%。BHJ 光催化剂的最大降解率可能是由于 RTh-Se-F 有机半导体的高吸收特性导致光生电子-空穴对的吸收容量扩大和寿命延长。