ZnO nanocone arrays (NCAs) decorated with black TiO₂ nanoparticles (B-TiO₂ NPs) were uniformly anchored on the surface of carbon cloth (CC) directly by a simply electrochemical deposition method. Thus a novel B-TiO₂ NPs/ZnO NCAs-CC hierarchical heterostructure was formed. It displayed superior performance and achieved a higher photocurrent over 0.4 mA$cm^-2 before the onset of the dark current, attributed to the separation of the photogenerated electron-hole pair. Based on the B-TiO₂ NPs/ZnO NCAs-CC heterostructure, the catalyst was fabricated for promoting the separation of charge carriers. Moreover, the introduction of Ti³⁺ and oxygen vacancies on the surface of TiO₂ NPs expanded the absorption band edge and enhanced the electrical conductivity as well as the charge transportation on the catalytic surface. It indicates that the B-TiO₂ NPs/ZnO NCAs-CC composite is beneficial to the improvement of the photoelectrochemical (PEC) activity.

直接用简单的电化学沉积方法将装饰有黑色TiO ₂纳米颗粒（B-TiO ₂ NPs）的ZnO纳米锥阵列（NCA）均匀地锚定在碳布（CC）的表面上。因此，形成了新颖的B-TiO ₂ NPs / ZnO NCAs-CC分层异质结构。它表现出优越的性能，并在暗电流开始之前达到了超过0.4 mA $ cm ^-2的更高光电流，这归因于光生电子-空穴对的分离。基于B-TiO ₂ NPs / ZnO NCAs-CC的异质结构，制备了促进电荷载流子分离的催化剂。此外，在TiO ₂表面上引入了Ti ³⁺和氧空位NP扩大了吸收带的边缘，增强了电导率以及催化表面上的电荷传输。这表明B-TiO ₂ NPs / ZnO NCAs-CC复合材料有利于提高光电化学性能。