CO₂ Reforming Characteristics under Visible Light Response of Cr- or Ag-Doped TiO₂ Prepared by Sol-Gel and Dip-Coating Process

Figure 2

Schematic drawing of CO₂ reforming experimental system: ((1) Xe lamp; (2) coloured glass filter; (3) quartz glass disc; (4) stainless pipe; (5) gas sampling tap; (6) copper disc; (7) teflon cylinder; (8) valve; (9) CO₂ gas cylinder).