{"title":"HP-HT Treatment of Hexagonal Boron Nitride for Higher Photocatalytic Degradation of Organic Pollutants","authors":"Liang Cui, Wangxi Zhang, Baoyan Liang, Linlin Wang, Mingli Jiao","doi":"10.3103/S1063457623020028","DOIUrl":null,"url":null,"abstract":"<p>Hexagonal boron nitride (h-BN) solid waste recovered from the high pressure and high temperature (HP-HT) synthesis of cubic boron nitride was used as photocatalyst to study its degradation performance in organic pollutants. Results showed that the main phase of the solid waste was h‑BN and it contained a small amount of impurity phase. The grains were irregular, and the grain size was approximately several micrometers. Compared with commercial h-BN powder, h-BN waste had strong light absorption ability in the whole light range. Under visible-light irradiation, the degradation ability of h-BN waste to organic pollutants was very weak. Adding H<sub>2</sub>O<sub>2</sub> could significantly improve the photocatalytic performance of h-BN waste and basically degrade methyl orange (MO), rhodamine B (RhB), methylene blue (MB) in 30, 60, and 80 min, respectively.</p>","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"45 2","pages":"126 - 130"},"PeriodicalIF":1.2000,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Superhard Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.3103/S1063457623020028","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Hexagonal boron nitride (h-BN) solid waste recovered from the high pressure and high temperature (HP-HT) synthesis of cubic boron nitride was used as photocatalyst to study its degradation performance in organic pollutants. Results showed that the main phase of the solid waste was h‑BN and it contained a small amount of impurity phase. The grains were irregular, and the grain size was approximately several micrometers. Compared with commercial h-BN powder, h-BN waste had strong light absorption ability in the whole light range. Under visible-light irradiation, the degradation ability of h-BN waste to organic pollutants was very weak. Adding H2O2 could significantly improve the photocatalytic performance of h-BN waste and basically degrade methyl orange (MO), rhodamine B (RhB), methylene blue (MB) in 30, 60, and 80 min, respectively.
期刊介绍：
Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.
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