A robust CdS/In₂O₃ hierarchical heterostructure derived from a metal–organic framework for efficient visible-light photocatalytic hydrogen production

Abstract

CdS/In2O3 hierarchical nanotubes with intimate and extensive contact between CdS and In2O3 were synthesized from a MOF and showed huge improvement of visible-light photocatalytic hydrogen production.

Hollow Structured Metal Sulfides for Photocatalytic Hydrogen Generation

“…HRTEM characterization verified the formation of CdS/In 2 O 3 heterostructure wherein lattice fringes corresponding to (100) and (002) crystal planes of hexagonal CdS can be found around In 2 O 3 nanoparticles. Such an intimate interface and suitable energy band structure between the two semiconductors, as well as the exceptional features of MOFs‐derived nanomaterials, allowed the modified photocatalyst to show good activity in visible‐light photocatalytic H 2 production without the addition of any cocatalyst . On the other hand, graphitic carbon materials such as N‐doped carbon and carbon nitride are well‐known semiconductors to form heterostructure with other semiconductors owing to their high conductivity and outstanding electron mobility for directing the movements of the electron‐hole pairs.…”

“…MOF‐derived method shares both the properties of the hard template and the self‐template method. This method requires pre‐prepared MOF as a hard template and etching process, but MOF also plays a role as self‐template, and the Kirkendall effect is observed during the second treatment . Therefore, the products of this method have similar morphology and size of MOF.…”

“…For example, heterostructures of multi‐metal sulfides and sulfide/oxide were prepared by Yang et al . and Ren et al ., respectively, by employing MIL‐68 . MIL‐68‐derived nanoparticles are mostly sought when preparing an In‐based photocatalyst due to its tubular morphology.…”

Synthesis of ZnIn2S4@Co3S4 particles derived from ZIF-67 for photocatalytic hydrogen production

“…32,33 Moreover, when the energy band structures of the two components are well matched, MOF derivatives can promote electron transfer and photo-generated charge carrier separation through contact surfaces to improve activity. 34,35 Therefore, MOF derivatives are widely applied in environmental energy catalysis.…”

Enzyme‐Encapsulated DNA Hydrogel for Highly Efficient Electrochemical Sensing Glucose

“…Initially, the In 2 O 3 À CdS nanocomposite with the hollow rod was easily prepared via the solvothermal method and lowtemperature hydrothermal reaction route. [11] The transmission electron microscopy (TEM) ( Figure 1A and Figure S2A-B) and scanning electron microscopy (SEM) ( Figure 1D and Figure S2C-D) at different magnifications display the synthesized MIL-68 has an ideal regular hexagonal rod-like morphologies. TEM ( Figure 1B and Figure S2G) and SEM ( Figure 1E and Figure S2H-I) demonstrated that MIL-68 is converted from a solid hexagonal structure to a hollow In 2 O 3 nanotube with two-dimensional micro-rod nanosheets after calcination at 500°C for 1 h. After hydrothermal treatment with CdS precursors, the In 2 O 3 À CdS indicated that part of the crystalline CdS was dispersed on the inner and outer surfaces of the In 2 O 3 units ( Figure 1C, F and Figure S2J-L).…”