TY - JOUR
T1 - Fabrication of Ag
2
O/TiO
2
composites on nanographene platelets for the removal of organic pollutants
T2 - Influence of oxidants and inorganic anions
AU - Saleh, Rosari
AU - Taufik, Ardiansyah
AU - Prakoso, Suhendro Purbo
PY - 2019/6/30
Y1 - 2019/6/30
N2 -
Ternary Ag
2
O/TiO
2
/nanographene platelet (Ag
2
O/TiO
2
/NGP) composites containing various amounts of NGP were synthesized using a microwave-assisted method and were used as catalysts for degradation of organic dyes in aqueous solution. The composites were characterized by various methods, and their photocatalytic performance was systematically investigated with respect to degradation of methylene blue. Compared with pure TiO
2
and Ag
2
O nanoparticles as well as Ag
2
O/TiO
2
composites, the Ag
2
O/TiO
2
/NGP composites exhibited superior photocatalytic performance in the UV and visible light range. The results also indicated that Ag
2
O/TiO
2
/NGP composites could be used as efficient broad-spectrum catalysts for the removal of several dye contaminants in aqueous solutions. The correlation between photocatalytic mechanism and physical properties of the catalysts was discussed. The effects of the addition of hydrogen peroxide (H
2
O
2
) and persulfate on MB degradation were also investigated. Photocatalytic efficiency was noticeable in the presence of both oxidizers. Because inorganic anions are common substances in natural water, their influence was also evaluated. They were found to inhibit the catalytic activity of Ag
2
O/TiO
2
/NGP composites. Their effectiveness in inhibiting photocatalytic degradation of MB was CO
3
2−
> NO
3
−
> HPO
4
−
> Cl
−
> SO
4
2−
.
AB -
Ternary Ag
2
O/TiO
2
/nanographene platelet (Ag
2
O/TiO
2
/NGP) composites containing various amounts of NGP were synthesized using a microwave-assisted method and were used as catalysts for degradation of organic dyes in aqueous solution. The composites were characterized by various methods, and their photocatalytic performance was systematically investigated with respect to degradation of methylene blue. Compared with pure TiO
2
and Ag
2
O nanoparticles as well as Ag
2
O/TiO
2
composites, the Ag
2
O/TiO
2
/NGP composites exhibited superior photocatalytic performance in the UV and visible light range. The results also indicated that Ag
2
O/TiO
2
/NGP composites could be used as efficient broad-spectrum catalysts for the removal of several dye contaminants in aqueous solutions. The correlation between photocatalytic mechanism and physical properties of the catalysts was discussed. The effects of the addition of hydrogen peroxide (H
2
O
2
) and persulfate on MB degradation were also investigated. Photocatalytic efficiency was noticeable in the presence of both oxidizers. Because inorganic anions are common substances in natural water, their influence was also evaluated. They were found to inhibit the catalytic activity of Ag
2
O/TiO
2
/NGP composites. Their effectiveness in inhibiting photocatalytic degradation of MB was CO
3
2−
> NO
3
−
> HPO
4
−
> Cl
−
> SO
4
2−
.
KW - Composites
KW - Methylene blue
KW - Nanographene platelet
KW - Photocatalytic degradation
KW - Waste purification
UR - http://www.scopus.com/inward/record.url?scp=85062396413&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2019.03.027
DO - 10.1016/j.apsusc.2019.03.027
M3 - Article
AN - SCOPUS:85062396413
VL - 480
SP - 697
EP - 708
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -