Preparation of a Coal-Based MoS/SiO/GO Composite Catalyst and Its Performance in the Photocatalytic Degradation of Wastewater and Hydrogen Production.

Photocatalytic degradation of wastewater and the simultaneous production of hydrogen (H) is a green and efficient method to solve energy and environmental problems. In this paper, coal-based SiO/GO with a stable structure was prepared by a modified Hummers oxidation method, and then, a lotus-shaped composite photocatalyst, MoS/SiO/GO, was prepared by in situ loading of flower cluster MoS from sodium molybdate reduction onto SiO/GO. Its photocatalytic degradation of wastewater and H production properties were investigated while characterizing the material structure.

Photo-derived fixation of dinitrogen into ammonia at ambient condition with water on ruthenium/coal-based carbon nanosheets.

Photocatalytic synthesis of ammonia is a kind of compelling and challenging nitrogen fixation method. In this paper, we extract the small-sized graphite-like carbon layer in the coal by organic solvent extraction method using HNO3 pretreated coal as a precursor. Then the coal-based carbon nanosheets (CNs) containing with Ca, Ti, Fe, Al, Si, C, N, O and other metal/non-metal ions was obtained under the assistance of the ultrasonication.

Facile photo-ultrasonic assisted reduction for preparation of rGO/AgCO nanocomposites with enhanced photocatalytic oxidation activity for tetracycline.

Various antibiotics in the aquatic systems have threat the aquatic ecosystem balance and the human health. In this study, a degradation treatment method for tetracycline (TC), one of the commonly used antibiotics, was explored by using novel photocatalysts of rGO/AgCO under simulated sunlight, because conventional treatment methods are not efficient on the removal of TC. rGO/AgCO nanocomposites were synthesized via a facile photo-ultrasonic assisted reduction method.

Synthesis and photocatalytic CO reduction performance of aminated coal-based carbon nanoparticles.

To obtain high-efficiency, low-cost, environmentally friendly carbon-based photocatalytic material, we synthesized coal-based carbon dots with sp carbon structure and multilayer graphene lattice structure by the hydrogen peroxide (HO) oxidation method to strip nano-scale crystalline carbon in the coal structure and link with oxygen-containing groups such as the hydroxyl group. N, S co-doped aminated coal-based carbon nanoparticles (NH-CNPs) were then obtained by thionyl chloride chlorination and ethylenediamine passivation. The physical properties and chemical structure of the synthesized NH-CNPs were studied and the photocatalytic CO reduction performance was tested.

Facile One-Step Sonochemical Synthesis and Photocatalytic Properties of Graphene/AgPO Quantum Dots Composites.

In this study, a novel graphene/AgPO quantum dot (rGO/AgPO QD) composite was successfully synthesized via a facile one-step photo-ultrasonic-assisted reduction method for the first time. The composites were analyzed by various techniques. According to the obtained results, AgPO QDs with a size of 1-4 nm were uniformly dispersed on rGO nanosheets to form rGO/AgPO QD composites.

Enhanced Fluorescence Properties of Carbon Dots in Polymer Films.

Carbon dots of small carbon nanoparticles surface-functionalized with 2,2'-(ethylenedioxy)bis(ethylamine) (EDA) were synthesized, and the as-synthesized sample was separated on an aqueous gel column to obtain fractions of the EDA-carbon dots with different fluorescence quantum yields. As already discussed in the literature, the variations in fluorescence performance among the fractions were attributed to the different levels and/or effectiveness of the surface functionalization-passivation in the carbon dots. These fractions, as well as carbon nanoparticles without any deliberate surface functionalization, were dispersed into poly(vinyl alcohol) (PVA) for composite films.

Boron nitride nanomaterials for thermal management applications.

Hexagonal boron nitride nanosheets (BNNs) are analogous to their two-dimensional carbon counterparts in many materials properties, in particular, ultrahigh thermal conductivity, but also offer some unique attributes, including being electrically insulating, high thermal stability, chemical and oxidation resistance, low color, and high mechanical strength. Significant recent advances in the production of BNNs, understanding of their properties, and the development of polymeric nanocomposites with BNNs for thermally conductive yet electrically insulating materials and systems are highlighted herein. Major opportunities and challenges for further studies in this rapidly advancing field are also discussed.

Flexible graphene-graphene composites of superior thermal and electrical transport properties.

Graphene is known for high thermal and electrical conductivities. In the preparation of neat carbon materials based on graphene, a common approach has been the use of well-exfoliated graphene oxides (GOs) as the precursor, followed by conversion to reduced GOs (rGOs). However, rGOs are more suitable for the targeted high electrical conductivity achievable through percolation but considerably less effective in terms of efficient thermal transport dictated by phonon progression.