Black titania is an attractive applicant as a narrow bandgap absorber in photovoltaic cells. However, the non-equivalency between the amount of visible light absorbed and the photocatalytic activities limits its usage as photoanodes in the dye sensitized solar cells (DSSCs). Herein, the synthesized black titania (BT) via imidazole at 400^oC; without washing steps, produces not only Ti₂O₃ and Ti₃O₅ nanoparticles but also allows the formation of the C₃N₄ nanosheets; which is emphasized via XRD, TEM-SAED-IFFT, FTIR, CV and XPS studies. The BT incorporated with hole transporting metals including Ag₂O, CuO and Ag₂S; at 3% loading, synthesized by deposition precipitation route are also fabricated to form p-n junction interfaces. The best conversion efficiency attained when using Ag₂O/BT was 6%; that presented the highest IPCE% in the visible light margin of 500–750 nm, followed by CuO (5.6%) and BT (4.9%). Although Ag₂O/BT did not absorb visible light as CuO, however, it offers minimum optical and electronic losses. Besides, it gives the highest dielectric constant (ε′) value subsequent BT and exposes numerous active sites. Well correlations with vibrational, surface texturing, permittivity and electrical conductivity were achieved and discussed to have a view on the effect of the C₃N₄ interface as well as oxygen defect sites and the incorporation with metal oxide/sulfide groups. This work supplies a new aspect in the synthesis of g-C₃N₄ while synthesizing the oxygen deficient TiO_2-x in solar energy conversion reactions.

黑二氧化钛作为光伏电池中的窄带隙吸收剂是有吸引力的申请人。然而，吸收的可见光量与光催化活性之间的不等价性限制了其在染料敏化太阳能电池 (DSSC) 中作为光阳极的使用。在此，通过咪唑在 400 ^o C合成黑色二氧化钛 (BT) ；没有洗涤步骤，不仅产生Ti ₂ O ₃和Ti ₃ O ₅纳米颗粒，而且允许形成C ₃ N ₄纳米片；通过 XRD、TEM-SAED-IFFT、FTIR、CV 和 XPS 研究强调了这一点。BT 与空穴传输金属（包括 Ag ₂ O、CuO 和 Ag _2）结合; 在 3% 的负载下，通过沉积沉淀路线合成的也被制造以形成 pn 结界面。使用 Ag ₂ O/BT时获得的最佳转换效率为 6%；在 500-750 nm 的可见光边缘表现出最高的 IPCE%，其次是 CuO (5.6%) 和 BT (4.9%)。尽管 Ag ₂ O/BT 不像 CuO 那样吸收可见光，但是它提供了最小的光学和电子损耗。此外，它在BT 之后提供了最高的介电常数 ( ε ' ) 值并暴露了许多活性位点。实现了与振动、表面纹理、介电常数和电导率的良好相关性，并讨论了 C ₃ N _{4 的影响}界面以及氧缺陷位点以及与金属氧化物/硫化物基团的结合。这项工作为gC ₃ N ₄的合成提供了一个新的方面，同时在太阳能转换反应中合成了缺氧的TiO _2-x。