Table 3.

Recycling experiments^a.

Run	1	2	3	4	5	6	7
Time (Min)	50	50	50	50	50	50	50
Yield (%)b	91	90	89	86	60 (90)c	53 (89)d	50(89)e

^aConditions as mentioned in the text, ^b,c,d,eThe number in bracket specifies the yield of 1,3,4-oxadiazole by using the recycled acidified rGOPhSO₃H catalyst.