Facile Synthesis of Copper-doped Mesoporous Silica Pillared Clay (Cu-MSPC) as a High-performance Catalyst for Hydroxylation of Benzene to Phenol

Abstract

A series of copper-doped mesoporous silica pillared clay (Cu-MSPC) with high catalytic performance on the hydroxylation of benzene to phenol have been synthesized with a facile process. The high conversion (31.1%) and selectivity (96%) toward phenol are achieved with only 4.16% copper loading. The characterization results show that the copper of these materials is doped in the intergallery silica pillar, leading to the high catalytic performance at low copper loadings. Meanwhile, the formation of Cu-MSPC structure is proposed.

Nickel nanoparticles highly dispersed in silica pillared clay as an efficient catalyst for chlorobenzene dechlorination

“…At the same time, the BE value of the Si 2p and O 1S decrease to 103.2 and 532.0 eV, respectively, compared with the reported oxidation state of silica and SPC. 43 This might be due to the Ni-O-Si bonds between the Ni atom of nickel nanoparticles and the framework of SPC, which causes a decrease of the density of the lining electron cloud of the oxygen and silicon atoms. 44 3.7 FTIR patterns of as-prepared samples Fig.…”

“…This can be contributed to the fact that as most of the Ni atoms were reduced from the framework of SPC, the Ni-O-Si bonds were destroyed. 43,45 However, the reduction process is not complete, leading to a small part of the Ni-O-Si bonds exist in the samples, which is the reason that nickel particles were xed between the interlayer of Ni 0 -SPCs.…”