Competitive Self-Assembly of PANI Confined MoS₂ Boosting the Photocatalytic Activity of the Graphitic Carbon Nitride

Abstract

The phosphomolybdic acid hydrate (PMo12)-based g-C3N4-PANI-MoS2 with the conductive polyaniline mediator and the nanosized MoS2 cocatalyst were designed and in situ fabricated onto earth-abundant and environment-friendly g-C3N4 for the first time. The PMo12 not only polymerized the aniline (ANI) monomer but also oxidized the thiourea and formed the nanosized MoS2 cocatalyst at a low temperature, and hence the PANI embraced the as-formed MoS2 and refined its particle size for more marginal active sites. Consequently, the optimal g-C3N4-PANI-MoS2 exhibited a very high photocatalytic H2 evolution activity of 29.70 μmol/h under visible light irradiation, which was 11.4 and 270.0 times larger than that of g-C3N4-MoS2 and the pristine g-C3N4, respectively, indicating the extremely important role of the synergistic effect of the high conductivity of PANI and PANI-refined nanosized MoS2 and providing a facile method for the design of novel high-performance catalyst for the solar conversion.

Oxidative Photopolymerization of 3,4‐Ethylenedioxythiophene (EDOT) via Graphitic Carbon Nitride: A Modular Toolbox for Attaining PEDOT**

“…It is known that monomers such as EDOT, aniline and pyrrole are prone to oxidative polymerization and even further an in situ polymerization based upon redox relay mechanism assisted with non‐noble metal can result in a highly efficient catalyst for solar conversion as reported by Kui Li and colleagues [40] . In our case, we have attempted to obtain a possible reaction mechanism.…”

Hierarchical Fe2O3@MoS2/C Nanorods as Anode Materials for Sodium Ion Batteries with High Cycle Stability

“…Compared to the XRD pattern of Fe 2 O 3 , an obvious additional diffraction peak located at around 14.2°is observed, which is indexed to the (002) plane of MoS 2 . 32,33 Besides, all of the other peaks are well indexed to Fe 2 O 3 . 34 Therefore, the above results strongly prove that MoS 2 is successfully grown on the surface of Fe 2 O 3 and the Fe 2 O 3 phase is well maintained during the hydrothermal process.…”

“…26,47 The peak of the S 2s spectrum was at 225.9 eV. The high-resolution S 2p spectrum was resolved into five peaks (Figure 3F) at 161.9, 162.9, 163.3, 168.9, and 170.1 eV, corresponding to S 2p 3/2 , S 2p 1/2 , and S 2 2− at the bridge site of MoS 2 and SO 2 4− 2p 3/2 and SO 2 4− 2p 1/2 , 32,48,49 which were caused by partial MoS 2 degradation, respectively.…”

In situ sulfuration synthesis of heterostructure MoS2–Mo2C@C for boosting the photocatalytic H2 production activity of TiO2

“…Interestingly, metal sulfides have been extensively studied for boosting the photocatalytic hydrogen-formation efficiency because of the edged S atoms in metal sulfides with a powerful H + -absorption ability. [33][34][35][36] In our recent works, it was also proved that the unsaturated sulfur atoms of MoS 2 as hydrogen-formation catalytic centers can rapidly capture hydrogen ions from solution to facilitate the H 2 -formation activity of g-C 3 N 4 , CdS and TiO 2 . 37,38 In this work, the S element was introduced into Mo 2 C@C to generate the heterostructure MoS 2 -Mo 2 C@C by in situ sulfidation of Mo 2 C@C at high temperature.…”