In the field of two-dimensional carbon materials, graphdiyne oxide, as an important derivative of graphdiyne, has become a research hotspot at the forefront of materials science due to its unique molecular structure, tunable physicochemical properties, and excellent interfacial characteristics. From powder form to controllable thin film preparation, it has achieved precise control over material properties, demonstrating irreplaceable application potential in energy, catalysis, optoelectronics, and other fields, providing core material support for the development of novel functional devices.
Graphdiyne oxide is a two-dimensional carbon nanomaterial obtained by oxidative modification of graphdiyne. It consists of a stable two-dimensional network structure formed by the conjugation of sp and sp² hybridized carbon atoms, with an interlayer spacing of approximately 0.36-0.38 nm. After oxidative modification, oxygen-containing functional groups such as hydroxyl and carboxyl groups are uniformly distributed on the material surface, retaining the intrinsic conjugated framework and porous structure of graphdiyne while endowing it with stronger hydrophilicity, high specific surface area, and interfacial activity. Primitive graphyne oxide typically exists as a black powder with flakes mostly in the nanoscale. It exhibits excellent chemical and thermal stability, with a decomposition temperature reaching 400-500℃, maintaining structural stability even in harsh environments.
Through controllable preparation processes, graphyne oxide powder can be processed into precisely sized black thin films, commonly sized at 1×1cm and 1.5×1.5cm, with thicknesses precisely controlled between 300-500nm, achieving standardized customization of material morphology and size. These films are uniformly dense, matte black, and possess both good mechanical flexibility and structural integrity, allowing for stable adhesion to various substrate surfaces. The preparation process typically involves first dispersing the graphyne oxide powder in a polar solvent to form a uniform and stable suspension. Then, through processes such as solution spin coating, vacuum filtration, or interfacial polymerization, the solution concentration, deposition time, and annealing parameters are precisely controlled to precisely manage the film thickness and size, ultimately yielding defect-free, highly uniform graphyne oxide films.
The core advantage of graphyne oxide films lies in the synergistic controllability of their structure and properties. Its two-dimensional microporous structure and abundant oxygen-containing functional groups construct a unique "pore-active site" synergistic system, providing ample space for ion transport and molecular adsorption due to its high specific surface area. The 300-500 nm thickness design avoids the structural fragility of ultrathin films while shortening the transport path of ions and electrons, ensuring transport efficiency. Standard sizes of 1×1 cm and 1.5×1.5 cm are suitable for the needs of laboratory basic research and small-scale device fabrication, facilitating performance testing and application verification. Furthermore, the photoelectric properties of the film can be controlled by the degree of oxidation and preparation parameters, exhibiting both good photoresponse and conductivity, laying the foundation for photoelectric conversion and sensing applications.
At the application level, graphdiyne oxide films, with their diverse performance advantages, cover multiple cutting-edge fields. In the energy storage field, its porous structure and high conductivity can serve as electrode materials for lithium-ion batteries and supercapacitors, promoting rapid ion diffusion and improving device energy density and cycle stability. In the field of catalysis, the oxygen-containing functional groups on the surface provide abundant active sites, making it suitable as a carrier or catalyst for photocatalysis and electrocatalysis. It can be used for the degradation of organic pollutants and energy conversion reactions, exhibiting excellent catalytic efficiency and recyclability. In the fields of optoelectronics and sensing, the photoresponse characteristics and interface sensitivity of the thin film can be used to prepare photodetectors and biosensors, enabling rapid conversion of light signals and highly sensitive detection of biomolecules. In the field of environmental purification, its high specific surface area and strong adsorption capacity can be used for the adsorption and separation of heavy metal ions and organic pollutants, showing practical value in water treatment and air purification.
As a novel two-dimensional carbon material, the development of graphdiyne oxide thin films from powder to controllable films has broken through the performance limitations of traditional carbon materials, achieving a precise match between structure, size, and performance. With continuous optimization of the preparation process and in-depth application research, these black thin films will be applied in more emerging fields, promoting the innovative development of materials science and related industries, and becoming one of the key materials supporting future high-performance functional devices.
