Qihan Sun , Lin Yang , Fengjie Hu , Changhuan Liang , Haiwang Wang , Jian Qi
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引用次数: 0
Abstract
In light of the growing awareness of environmental protection, there is an urgent need to seek out alternatives to traditional heavy metal pigments that are known to be harmful to the environment. BiVO4 (BVO) demonstrates considerable potential as a non-toxic and environmentally friendly yellow pigment. However, it should be noted that existing BVO pigment formulations still present several challenges regarding production cost, weathering resistance, crystalline morphology, and particle size distribution, which collectively limit their widespread application. Given the superior yellow color tone and optical properties of monoclinic scheelite BVO (ms-BVO) crystals, this study examines ms-BVO from both thermodynamic and kinetic perspectives, elucidating the impact of solution acid-base environment, hydrothermal reaction temperature, and reaction time on BVO crystals. It can be observed that when the pH is adjusted to a value between 4 and 7, the hydrothermal temperature is set at 120 °C, and the hydrothermal time is not less than 3 h, the formation of ms-BVO with a crystal structure is more favorable. Additionally, SiO2 was integrated into composite pigment preparation to assess the color performance and dispersion of SiO2/BVO composite pigments. The analysis revealed that upon the addition of an optimal quantity of SiO2, the crystal size increased, resulting in a more intense yellow hue. This study introduces a novel approach for the enhancement of environmentally sustainable BVO pigments, establishing a foundation for their extensive utilization in industrial applications.
期刊介绍:
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.