Inducing In Situ Hydrothermal Carbonization of Glucose To Synthesize Carbon–MIL-101 Hybrid Composites for Improved Hydrogen Uptake

Abstract

A sustainable methodology was explored to synthesize carbon−MIL-101 hybrid composites by advantageously inducing in situ hydrothermal carbonization (HTC) of glucose during the synthesis of MIL-101. Carbon−MIL-101 hybrid composites with varying carbon contents were synthesized by tuning the content of glucose. The HTC of glucose and incorporation of carbon in MIL-101 were confirmed by probing 13 C nuclear magnetic resonance, transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman investigations. The microporosity of composites can be fine-tuned by optimizing the carbon loading. Consequently, the carbon−MIL-101 hybrid composites with an optimized pore size and high pore volume and surface area conferred enhanced H 2 uptake properties (by ca. 11% compared to MIL-101) at 77 K and 1 bar. The noteworthy enhancement in H 2 uptake for the synthesized carbon−MIL-101 hybrid composites endorsed the potential of the studied methodology to design hybrid metal−organic framework composites with tuned porosity for H 2 storage application.

Unraveling the photocatalytic electron transfer mechanism in a Ti-MOF/g-C3N4 heterojunction for high-efficient coupling performance of primary amines

“…16 However, g-C 3 N 4 has the shortcoming of low surface area and also has low light harvesting. 17,18 Interestingly, metal-organic frameworks (MOFs) are promising photo-catalysts owing to their large surface areas, 19,20 and MOFs could reduce the CN's drawback of low surface area. Therefore, many works about coupling CN and MOF have been reported, which exhibit excellent photocatalytic activity.…”

Preparation of Nitrogen-Doped Porous Carbon from Waste Polyurethane Foam by Hydrothermal Carbonization for H2S Adsorption

“…Hydrothermal carbonization is a typical thermochemical conversion technique, which includes the precursor material degradation, dehydration, aromatic and carbon forming, carbon nucleation, and growth . Hydrothermal carbonization is an effective method for carbonization of biomass materials such as polysaccharides (i.e., polyhydroxy compounds). , The products obtained by hydrothermal carbonization are easy to aromatize for forming carbon to obtain a high yield, to form functional groups by avoiding the loss of the nitrogen, oxygen species, and develop micro- or mesopores , at a relatively mild temperature range of 150–350 °C. , Thus, the final products by further activation have high specific areas, high heteroatom contents, and excellent conductivities, which have been widely applied in hydrogen storage, catalyst supports, adsorbents, and supercapacitors . However, few studies have been found on the preparation of porous carbon using the waste polymer as the carbon precursor assisted by hydrothermal carbonization.…”

“…21,22 The products obtained by hydrothermal carbonization are easy to aromatize for forming carbon to obtain a high yield, to form functional groups by avoiding the loss of the nitrogen, oxygen species, and develop micro-or mesopores 23,24 at a relatively mild temperature range of 150−350 °C. 25,26 Thus, the final products by further activation have high specific areas, high heteroatom contents, and excellent conductivities, which have been widely applied in hydrogen storage, 27 catalyst supports, 28 adsorbents, 19 and supercapacitors. 29 However, few studies have been found on the preparation of porous carbon using the waste polymer as the carbon precursor assisted by hydrothermal carbonization.…”