A transmission FTIR cell is currently being used to study the adsorption of gases on oxide, clay and zeolite powders in the different research projects that are ongoing in the Grassian laboratory. There are several different designs of the cell that we use. One can be used to heat and samples. The temperature range is from 100 to 900 K. The transmission FTIR cell can also be used in photocatalysis studies.

(a) Schematic of the FT-IR apparatus used to study photooxidation reactions in zeolits. (a) A stainless steel coolant system (left) with copper power leads welded to the end of a stainless steel pipe is put inside of a stainless steel reducing cross (right).

 

 

 

 

 

(b) The copper power leads shown in (a) are attached to copper power leads that are connected to nickel jaws so that the tungsten grid held in place by the nickel jaws could be resistively heated (left). Thermocouple wires shown in (a) are spot-welded to the tungsten grid to measure the temperature. After attaching the nickel jaw assembly (left) to (a) the entire reducing cross is then placed in a stainless steel cube. The cube has two BaF₂ windows to transmit infrared radiation and can be attached to a vacuum/gas handling system.