Dual Modification of Metal–Organic Frameworks for Exceptional High Piezo‐Photocatalytic Hydrogen Production

Abstract Metal–organic frameworks (MOFs) face significant challenges in photocatalysis due to severe carrier recombination. Here, a novel approach is presented that incorporates ─NH 2 groups and Cu ions onto MOFs with a MIL‐125 skeleton, forming NH 2 ‐MIL‐125 and Cu‐NH 2 ‐MIL‐125. This modification effectively enhances the polarity of MOFs, evidenced by significantly increased d 33 values (from 1.69 to 26.21 pm/V) and notable higher dipole moments (from 6.60 to 25.99 D). Notably, it's the first demonstration of boosting MOFs piezoelectricity via a dual modulation strategy. Moreover, the polarity can be further amplified by ultrasonic vibration based on the positive piezoelectric effect, which is justified by…

• NN
  National Natural Science Foundation of China

  Awards: 52071171, 22401198, 52202248, 22101105