Photocatalytic activity of metal nanoparticle-decorated titanium dioxide for simultaneous H2 production and biodiesel wastewater remediation

doi:10.1016/j.cjche.2020.08.010

Chinese Journal of Chemical Engineering ›› 2021, Vol. 36 ›› Issue (8): 86-100.DOI: 10.1016/j.cjche.2020.08.010

• Catalysis, Kinetics and Reaction Engineering • Previous Articles Next Articles

Photocatalytic activity of metal nanoparticle-decorated titanium dioxide for simultaneous H₂ production and biodiesel wastewater remediation

Patsakol Prayoonpunratn¹, Trin Jedsukontorn¹, Mali Hunsom^1,2,3

1 Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;
2 Current address:Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakorn Pathom 73170, Thailand;
3 Associate Fellow of Royal Society of Thailand(AFRST), Bangkok 10300, Thailand

Received:2020-07-20 Revised:2020-08-04 Online:2021-09-30 Published:2021-08-28
Contact: Mali Hunsom
Supported by:
The authors thank the TRF-CHE Research Career Development Grant (RSA5980015), the CU Graduate School Thesis Grant, Chulalongkorn University and the Center of Excellence on Petrochemical and Materials Technology (PETRO-MAT), Chulalongkorn University, Bangkok 10330, Thailand.

Photocatalytic activity of metal nanoparticle-decorated titanium dioxide for simultaneous H₂ production and biodiesel wastewater remediation

Patsakol Prayoonpunratn¹, Trin Jedsukontorn¹, Mali Hunsom^1,2,3

1 Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;
2 Current address:Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakorn Pathom 73170, Thailand;
3 Associate Fellow of Royal Society of Thailand(AFRST), Bangkok 10300, Thailand

通讯作者: Mali Hunsom
基金资助:
The authors thank the TRF-CHE Research Career Development Grant (RSA5980015), the CU Graduate School Thesis Grant, Chulalongkorn University and the Center of Excellence on Petrochemical and Materials Technology (PETRO-MAT), Chulalongkorn University, Bangkok 10330, Thailand.

Abstract

Abstract: A set of metal nanoparticle-decorated titanium dioxide (M_x/TiO₂; where x is the percent by mass,%) photocatalysts was prepared via the sol-immobilization in order to enhance the simultaneous hydrogen (H₂) production and pollutant reduction from real biodiesel wastewater. Effect of the metal nanoparticle (NP) type (M = Ni, Au, Pt or Pd) and, for Pd, the amount (1 %-4 %) decorated on the surface of thermal treated commercial TiO₂ (T₄₀₀) was evaluated. The obtained results demonstrated that both the type and amount of decorated metal NPs did not significantly affect the pollutant reduction, measured in terms of the reduction of chemical oxygen demand (COD), biological oxygen demand (BOD) and oil & grease levels, but they affected the H₂ production rate from both deionized water and biodiesel wastewater, which can be ranked in the order of Pt₁/T₄₀₀ > Pd₁/T₄₀₀ > Au₁/T₄₀₀ > Ni₁/T₄₀₀. This was attributed to the high difference in work function between Pt and the parent T₄₀₀. However, the difference between Pt₁/T₄₀₀ and Pd₁/T₄₀₀ was not great and so from an economic consideration, Pd/TiO₂ was selected as appropriate for further evaluation. Among the four different Pd_x/TiO₂ photocatalysts, the Pd₃/TiO₂ demonstrated the highest activity and gave a high rate of H₂ production (up to 135 mmol·h^-1) with a COD, BOD and oil & grease reduction of 30.3%, 73.7% and 58.0%, respectively.

Key words: Hydrogen production, Wastewater, Remediation, Photochemistry, Metal nanoparticle-decorated titanium dioxide

摘要： A set of metal nanoparticle-decorated titanium dioxide (M_x/TiO₂; where x is the percent by mass,%) photocatalysts was prepared via the sol-immobilization in order to enhance the simultaneous hydrogen (H₂) production and pollutant reduction from real biodiesel wastewater. Effect of the metal nanoparticle (NP) type (M = Ni, Au, Pt or Pd) and, for Pd, the amount (1 %-4 %) decorated on the surface of thermal treated commercial TiO₂ (T₄₀₀) was evaluated. The obtained results demonstrated that both the type and amount of decorated metal NPs did not significantly affect the pollutant reduction, measured in terms of the reduction of chemical oxygen demand (COD), biological oxygen demand (BOD) and oil & grease levels, but they affected the H₂ production rate from both deionized water and biodiesel wastewater, which can be ranked in the order of Pt₁/T₄₀₀ > Pd₁/T₄₀₀ > Au₁/T₄₀₀ > Ni₁/T₄₀₀. This was attributed to the high difference in work function between Pt and the parent T₄₀₀. However, the difference between Pt₁/T₄₀₀ and Pd₁/T₄₀₀ was not great and so from an economic consideration, Pd/TiO₂ was selected as appropriate for further evaluation. Among the four different Pd_x/TiO₂ photocatalysts, the Pd₃/TiO₂ demonstrated the highest activity and gave a high rate of H₂ production (up to 135 mmol·h^-1) with a COD, BOD and oil & grease reduction of 30.3%, 73.7% and 58.0%, respectively.

关键词: Hydrogen production, Wastewater, Remediation, Photochemistry, Metal nanoparticle-decorated titanium dioxide

Patsakol Prayoonpunratn, Trin Jedsukontorn, Mali Hunsom. Photocatalytic activity of metal nanoparticle-decorated titanium dioxide for simultaneous H₂ production and biodiesel wastewater remediation[J]. Chinese Journal of Chemical Engineering, 2021, 36(8): 86-100.

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Photocatalytic activity of metal nanoparticle-decorated titanium dioxide for simultaneous H₂ production and biodiesel wastewater remediation

Photocatalytic activity of metal nanoparticle-decorated titanium dioxide for simultaneous H₂ production and biodiesel wastewater remediation

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