**3.2 Photocatalytic hydrogen generation using PENQ**

After the possible optical and morphological characterization this PENQ system was utilized for the generation of hydrogen.

**Figure 2** depicts the rate of hydrogen production from fresh H2S gas. Highest produced hydrogen was seen 4848 μmole/h/0.1gm. Same catalyst after proper cleaning and drying were subjected for the same type of experiments showed the almost equal hydrogen generation under the same conditions.

**Figure 1.** *XRD, UV, PL and CV study of PENQ. Reproduced with copyright permission from American Chemical Society.*

#### **Figure 2.**

*Photocatalytic Hydrogen generation for PENQ. Reproduced with copyright permission from American Chemical Society.*

### **4. Modification on PENQ with the help of inorganic nanomaterials**

After the synthesis and photocatalysis experiments, loan PENQ an organic semiconductor material and by considering photostability and fascinating properties of inorganic TiO2 an effective and novel organo-inorganic (PENQ: TiO2) nanosystems

*Organic Semiconductor for Hydrogen Production DOI: http://dx.doi.org/10.5772/intechopen.107008*

is made. All the nanosystems were checked for visible light hydrogen generation experiments. As the stable PENQ has a band gap around 3 eV, it is selected for one of the composite member. In past this PENQ already synthesized using simple methods and it is also having a good molar absorption coefficient. In the present chapter this new organo-inorganic coupled photocatalyst system is prepared using solvothermal reaction method. Along with this characterization of these photosystems were done with the help of UV, PL, SEM, TEM and XRD analysis. Herein, during the individual synthesis of TiO2 the PENQ is introduced as 5 (PT-5), 10 (PT-10) and 17 mmol (PT-17) of TIP (titanium tetra-isopropoxide) reactant.
