{"created":"2025-02-21T04:34:27.244776+00:00","id":2008770,"links":{},"metadata":{"_buckets":{"deposit":"66dd1a86-efc0-4e75-bc48-d7eb847059c0"},"_deposit":{"created_by":41,"id":"2008770","owners":[41],"pid":{"revision_id":0,"type":"depid","value":"2008770"},"status":"published"},"_oai":{"id":"oai:hiroshima.repo.nii.ac.jp:02008770","sets":["1730444907710"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_title":"Enhanced visible-light photocatalytic activity of anatase-rutile mixed-phase nano-size powder given by high-temperature heat treatment","subitem_title_language":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Ishigaki, Takamasa","creatorNameLang":"en"}],"familyNames":[{"familyName":"Ishigaki","familyNameLang":"en"}],"givenNames":[{"givenName":"Takamasa","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Nakada, Yusuke","creatorNameLang":"en"}],"familyNames":[{"familyName":"Nakada","familyNameLang":"en"}],"givenNames":[{"givenName":"Yusuke","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Tarutani, Naoki","creatorNameLang":"en"}],"familyNames":[{"familyName":"Tarutani","familyNameLang":"en"}],"givenNames":[{"givenName":"Naoki","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Uchikoshi, Tetsuo","creatorNameLang":"en"}],"familyNames":[{"familyName":"Uchikoshi","familyNameLang":"en"}],"givenNames":[{"givenName":"Tetsuo","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Tsujimoto, Yoshihiro","creatorNameLang":"en"}],"familyNames":[{"familyName":"Tsujimoto","familyNameLang":"en"}],"givenNames":[{"givenName":"Yoshihiro","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Isobe, Masaaki","creatorNameLang":"en"}],"familyNames":[{"familyName":"Isobe","familyNameLang":"en"}],"givenNames":[{"givenName":"Masaaki","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Ogata, Hironori","creatorNameLang":"en"}],"familyNames":[{"familyName":"Ogata","familyNameLang":"en"}],"givenNames":[{"givenName":"Hironori","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Zhang, Chenning","creatorNameLang":"en"}],"familyNames":[{"familyName":"Zhang","familyNameLang":"en"}],"givenNames":[{"givenName":"Chenning","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Hao, Dong","creatorNameLang":"en"}],"familyNames":[{"familyName":"Hao","familyNameLang":"en"}],"givenNames":[{"givenName":"Dong","givenNameLang":"en"}]}]},"item_1617186476635":{"attribute_name":"Access Rights","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_1617186499011":{"attribute_name":"Rights","attribute_value_mlt":[{"subitem_rights":"© 2020 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited."}]},"item_1617186609386":{"attribute_name":"Subject","attribute_value_mlt":[{"subitem_subject":"titanium oxide","subitem_subject_scheme":"Other"},{"subitem_subject":"nano-size powder","subitem_subject_scheme":"Other"},{"subitem_subject":"phase transformation","subitem_subject_scheme":"Other"},{"subitem_subject":"mixed-phase","subitem_subject_scheme":"Other"},{"subitem_subject":"photocatalyst","subitem_subject_scheme":"Other"}]},"item_1617186626617":{"attribute_name":"Description","attribute_value_mlt":[{"subitem_description":"Nano-size EVONIK AEROXIDE® P25 titanium dioxide, TiO2, powder was heat-treated at temperatures, 700–900°C, in air. An X-ray diffraction study showed that the P25 powder is composed of approximately 20 and approximately 80 mass% of rutile and anatase phases, respectively. It was also shown that the transformation from anatase to rutile induced by hightemperature heat treatment was almost completed at 750°C, whereas a small amount (less than 3 mass%) of anatase phase was still left even in the powder heat-treated at 900°C. The transformation behaviour was consistent with results obtained by Raman scattering spectroscopy. Raman experiments also indicated that high-temperature heating induced the formation of oxide ion vacancies. Powders were dispersed in methyl orange (MO) aqueous solution, and the bleach rate of MO was measured to evaluate photocatalytic activity under ultraviolet (UV)- and visible-light irradiation. After the heat treatment, the UV-light photocatalytic performance sharply deteriorated. Interestingly, visible-light photocatalytic activity  was enhanced by high-temperature heating and reached the highest performance for an 800°C-heated sample, indicating that the P25 powder obtained high visible-light photocatalytic performance after heat treatment. Even after 900°C heat treatment, the photocatalytic performance was higher than that of as-received powder. Enhancement of photocatalytic activities was discussed in relation to visible light absorption and charge carrier transfer.","subitem_description_language":"en"},{"subitem_description":"T.I., H.O. and D.H. were supported by a programme, the Strategic Research Foundation at Private Universities, grant no. S1311023, from Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.","subitem_description_type":"Other"}]},"item_1617186643794":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_publisher":"Royal Society of Chemistry"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_1617186920753":{"attribute_name":"Source Identifier","attribute_value_mlt":[{"subitem_source_identifier":"2054-5703","subitem_source_identifier_type":"ISSN"}]},"item_1617187024783":{"attribute_name":"Page Start","attribute_value_mlt":[{"subitem_start_page":"191539"}]},"item_1617187056579":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2020-01-15","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"191539","bibliographicVolumeNumber":"7","bibliographic_titles":[{"bibliographic_title":"Royal Society Open Science","bibliographic_titleLang":"en"}]}]},"item_1617258105262":{"attribute_name":"Resource Type","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_1617265215918":{"attribute_name":"Version Type","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_1617353299429":{"attribute_name":"Relation","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1098/rsos.191539","subitem_relation_type_select":"DOI"}},{"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://dx.doi.org/10.1098/rsos.191539","subitem_relation_type_select":"DOI"}}]},"item_1617605131499":{"attribute_name":"File","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2023-03-18"}],"displaytype":"simple","filename":"RoySocOpenSci_191539.pdf","filesize":[{"value":"1.7 MB"}],"mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://hiroshima.repo.nii.ac.jp/record/2008770/files/RoySocOpenSci_191539.pdf"},"version_id":"24114300-bf05-4d0c-929d-991fe9646458"}]},"item_1732771732025":{"attribute_name":"旧ID","attribute_value":"53538"},"item_title":"Enhanced visible-light photocatalytic activity of anatase-rutile mixed-phase nano-size powder given by high-temperature heat treatment","item_type_id":"40003","owner":"41","path":["1730444907710"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2023-03-18"},"publish_date":"2023-03-18","publish_status":"0","recid":"2008770","relation_version_is_last":true,"title":["Enhanced visible-light photocatalytic activity of anatase-rutile mixed-phase nano-size powder given by high-temperature heat treatment"],"weko_creator_id":"41","weko_shared_id":-1},"updated":"2025-02-22T04:18:12.852443+00:00"}