Enhancing TiO2 activity for CO2 photoreduction through MgO decoration

Autor(es)

Torres, Juliana A. ^[1] ; Nogueira, Andre E. ^[2] ; da Silva, Gelson T. S. T. ^{[3, 1]} ; Lopes, Osmando F. ^[4] ; Wang, Yanjie ^[5] ; He, Tao ^{[6, 5]} ; Ribeiro, Caue ^{[1, 7]}

Afiliação do(s) autor(es)

^[1] Embrapa Instrumentat, Natl Nanotechnol Lab Agribusiness LNNA, BR-13561206 Sao Carlos, SP - Brazil

^[2] Fed Univ Ouro Preto UFOP, Inst Exact & Biol Sci ICEB, Dept Chem, BR-35400000 Ouro Preto, MG - Brazil

^[3] Fed Univ Sao Carlos UFSCar, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[4] Fed Univ Uberlandia IQUFU, Inst Chem, BR-38400902 Uberlandia, MG - Brazil

^[5] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190 - Peoples R China

^[6] Univ Chinese Acad Sci, Beijing 100049 - Peoples R China

^[7] Forschungszentrum Julich, Inst Energy & Climate Res, IEK 3 Electrochem Proc Engn, D-52425 Julich - Germany

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CO2 UTILIZATION; v. 35, p. 106-114, JAN 2020.
• Citações Web of Science: 2

Resumo

Herein we report on the influence of MgO's basic character in the photoactivity of MgO:TiO2 nanocomposites for the CO2 reduction reaction. TiO2 nanoparticles, decorated with MgO in different mass proportions, were synthesized by the physical mixing of pre-synthesized oxides followed by calcination. The decorated samples presented enhanced photocatalytic activity with higher selectivity for CO, while CH4 was also produced, as well as HCOOH and CH3COOH in a liquid medium in lower proportions. The results indicate that the beneficial MgO influence is only effective at low amounts, whilst a high MgO amount favors an insulating behavior instead of semiconducting, reducing the nanocomposite performance for CO2 photoreduction. (AU)

• Processo FAPESP: 16/21515-7 - Desenvolvimento de heteroestruturas de óxido de magnésio com ZnO e TiO2 para aplicação em processos de fotossíntese artificial
• Beneficiário: Juliana Arriel Torres
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/14330-8 - Estudos sobre a síntese e aplicação de heteroestruturas de nanocristais semicondutores em processos de fotossíntese artificial
• Beneficiário: Cauê Ribeiro de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular