Efficient Fe(III)/Fe(II) cycling triggered by MoO2 in Fenton reaction for the degradation of dye molecules and the reduction of Cr(VI)

Molybdenum‐based heterogeneous catalysts for the control of environmental pollutants

“…Shen et al 43 found that commercial MoO 2 itself could not decompose H 2 O 2 to produce powerful oxidizing radical species, but could be used as a cocatalyst to promote the circulation of Fe 3+ /Fe 2+ in Fenton reaction, which indirectly enhanced the removal of organic pollutants. The newly constructed H 2 O 2 /Fe 2+ /MoO 2 system could achieve 100% degradation of 20 mg/L RhB in 1 min with the condition of 0.4 mmol/L H 2 O 2 , 30 mg/L FeSO 4 ·7H 2 O and 0.3 g/L MoO 2 , and its efficiency was twice that of traditional Fenton reaction.…”

The construction of a palladium–hydrogen accelerated catalytic Fenton system enhanced by UiO-66(Zr)

“…According to previous research results, based on the reduction effect, 13–15 accelerating the transfer of electrons 16,17 and for the construction of redox mediators, 18–22 some organics can be used to accelerate the reduction of Fe III , as can some metal inorganics based on the same mechanisms mentioned above. 23–27 However, the potential secondary pollution risk, such as the increasing of BOD 5 , heavy metals and H 2 S in the effluent, should be prudently evaluated.…”

Graphene-Based Photo-Fenton Catalysts for Pollutant Control

“…It precipitates to form ferric hydroxide (Fe(OH) 3 ), namely iron sludge, when pH is above 3, leading to thorny secondary pollution [12]. Traditional Fenton reactions possess four major drawbacks: (1) low utilization efficiency of H 2 O 2 , (2) narrow pH range, (3) excess iron ion loss and secondary pollution of iron sludge, and (4) difficulties in recycling powder catalysts [13][14][15][16].…”