TABLE 1.

Pros and cons of various PFC designs.

Sl. No:	Design of PFC	Advantages	Disadvantages
1	Single Chamber Single Photoelectrode	• Simple Design	• Choice of Photoanode is limited
		• No need of PEM, hence the overall cost is reduced	• Overall cost moves to higher side when Pt is used
		• Minimum distance between electrodes reduces the overall resistance	• Single chamber limits the use of multiple organic pollutants
2	Single Chamber Dual Photoelectrode	• Replacing Pt with photocathode reduces the overall cost	• The selection of proper combination of electrodes is delicate • Single chamber limits the use of multiple organic pollutants
		• No need to use PEM
		• Low resistance
3	Dual Chamber Single Photoelectrode	• Different contaminant degradation or various applications can be performed simultaneously	• Overall cost moves to higher side when Pt and/or PEM is used in the system
		• Biasing can be introduced and controlled by pH variation in chamber
4	Dual Chamber Dual Photoelectrode	• Different applications in each electrode site	• Overall cost moves to higher side PEM is used in the system. • Complex design, as compared to single chamber design
		• No need of Pt cathode
		• Biasing can be introduced and controlled synergistically by the pH of the chambers and the fermi level mismatch of the photoelectrodes
5	Triple Chamber Design	• SGP can provide stable current for a long time	• Multifaceted design
6	Micro Fuel Cell Design	• Low resistance, since the distance between anode and cathode is minimum	• Complex micro-fabrication techniques • Mostly suitable for Sensor applications rather than mass pollutant degradation and power generation
		• Elimination of membrane
		• Uniform utilization of light irradiation
7	Rotating Disc Design	• Synergy of thin film and PEC design	• Complex design along with motorized rotating photoelectrode
		• Enhanced efficiency by utilizing continuously rotating photoelectrode