In this research, Black TiO₂ (BTiO₂), which consisted of Rutile Based Inorganic Hollow Microspheres (RBIHM) and hydrogenated anatase TiO₂ nanoparticles, decorated with MoS₂ nanosheets (HBTiO₂/RBIHM-MoS₂ photocatalyst) was synthesized using Pulsed Laser Ablation in Liquid (PLAL) followed by microwave irradiation. Formation of vertically aligned MoS₂ nanosheets, RBIHM and HBTiO₂ nanoparticles were confirmed by different characterization techniques. The spectroscopic analysis revealed phase transitions in HBTiO₂/RBIHM nano and microstructures along with the formation of different crystal disorders such as amorphous layers, oxygen vacancies, trivalent titanium ions and formation of molybdenum oxide (MoO_3-x) in MoS₂. In addition, MoS₂ films in HBTiO₂/RBIHM-MoS₂ nanocomposite showed both Mo⁵⁺ and Mo⁶⁺ oxidation state, which was inferred that these films have a p-type conductive behavior. Furthermore, the interconnected layers of MoS₂ nanosheets led to the formation of a porous like 3D nanostructure in HBTiO₂/RBIHM-MoS₂, which could significantly improve its photocatalytic performance. Arsenite photooxidation efficiencies of 70.3% and 96.6% and arsenate adsorption capacities of 1600 and 5200 μg g⁻¹ were obtained for HBTiO₂/RBIHM and HBTiO₂/RBIHM-MoS₂, respectively. The synergetic effects originated from making RBIHM-HBTiO₂, RBIHM-MoS₂ and MoS₂–HBTiO₂ heterojunctions along with the surface and morphology modification in MoS₂ NSs and HBTiO₂/RBIHM can explain the nanocomposite superior photocatalytic performance. The present work can trigger a broad interest in the cost-effective nanoarchitecture of visible light driven heterostructured photocatalysts.

本研究利用脉冲激光合成了由金红石型无机空心微球（RBIHM）和氢化锐钛矿型TiO ₂纳米颗粒组成的黑色TiO ₂（BTiO ₂），装饰有MoS ₂纳米片（HBTiO ₂ / RBIHM-MoS ₂光催化剂）。液体烧蚀（PLAL），然后进行微波辐照。通过不同的表征技术证实了垂直排列的MoS ₂纳米片，RBIMM和HBTiO ₂纳米片的形成。光谱分析揭示了HBTiO _2中的相变/ RBIHM纳米和微观结构，以及形成不同的晶体紊乱，例如非晶层，氧空位，三价钛离子以及在MoS _2中形成氧化钼（MoO _3-x）。此外，HBTiO ₂ / RBIHM-MoS ₂纳米复合材料中的MoS ₂膜同时显示Mo ⁵⁺和Mo ^6+的氧化态，推测这些膜具有p型导电行为。此外，MoS ₂纳米片的互连层导致在HBTiO ₂ / RBIHM-MoS _2中形成类似多孔的3D纳米结构，可以显着提高其光催化性能。对于HBTiO ₂ / RBIHM和HBTiO ₂ / RBIHM-MoS ₂，砷的光氧化效率分别为70.3％和96.6％，砷的吸附容量为1600和5200μgg ^-1。协同效应源于在MoS ₂ NSs和HBTiO ₂中使RBIHM-HBTiO ₂，RBIHM-MoS ₂和MoS ₂ -HBTiO ₂异质结以及表面和形态改性/ RBIHM可以解释纳米复合材料优异的光催化性能。当前的工作可以引起对可见光驱动的异质结构光催化剂的具有成本效益的纳米结构的广泛兴趣。