Effect of gold and iron nanoparticles on photocatalytic behaviour of titanium dioxide towards 1-butyl-3-methylimidazolium chloride ionic liquid

被引:19
作者
Ahmad, Tausif [1 ]
Bustam, Mohamad Azmi [1 ]
Irfan, Muhammad [2 ]
Moniruzzaman, Muhammad [1 ]
Samsudin, Mohamad Fakhrul Ridhwan [1 ]
Asghar, Hafiz Muhammad Anwaar [3 ]
Muhammad, Nawshad [4 ]
Iqbal, Jibran [5 ]
Bhattacharjee, Sekhar [6 ]
机构
[1] Univ Teknol Petronas, Chem Engn Dept, Seri Iskandar 32610, Perak Darul Rid, Malaysia
[2] Pakistan Council Sci & Ind Res, Lahore, Pakistan
[3] Univ Punjab, Inst Chem Engn & Technol, Lahore, Pakistan
[4] COMSAIS Univ, IRCBM, Lahore Campus, Islamabad, Pakistan
[5] Zayed Univ, Coll Nat & Hlth Sci, Abu Dhabi, U Arab Emirates
[6] Jadavpur Univ, Dept Chem Engn, Kolkata, India
关键词
Titanium dioxide; Gold nanoparticles; Photocatalytic degradation; Ionic liquid; Degradation mechanism; GREEN SYNTHESIS; DEGRADATION; TEMPERATURE; OXIDATION; ENHANCEMENT; PERFORMANCE; RECOVERY; REMOVAL; CATIONS; PHASE;
D O I
10.1016/j.molliq.2019.111277
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The high water solubility, chemical stability and low volatility of ionic liquids (ILs) have made them potentially persistent than conventional pollutants and toxic to the aquatic organisms. Therefore, extensive research efforts are being directed with an aim to develop cheap and efficient protocols to reduce the uncontrolled release of ILs in the environment. In the same line of action, titanium dioxide (TiO2) loaded with gold and iron nanoparticles were trialled for the photocatalytic degradation of highly concentrated 1-butyl-3-methylimidazolium chloride [BmimCl] ionic liquid. Furthermore, results pertaining to the degradation of the [BmimCl] using TiO2 loaded with gold nanoparticles (AuNPs) were compared with results obtained by using TiO2 loaded with Fe (NO3)(3).9H(2)O and pristine TiO2 under same set of conditions. It was found that TiO2 decorated AuNPs demonstrated 7 times higher photocatalytic degradation for highly concentrated [BmimCl] in 60 min of reaction time in comparison to the pristine TiO2. Congruently, investigations also revealed that TiO2 loaded AuNPs expressed 3.3 times higher photocatalytic degradation of [BmimCl] in comparison to conventional photocatalyst TiO2@Fe under same reaction conditions. The higher photocatalytic performance associated with TiO2 loaded AuNPs was due to the enhanced Schottky barrier, which could have minimized the photocharge carrier resistance separation and migration. The mechanism for photocatalytic degradation of [BmimCl] using TiO2 loaded AuNPs has been also been described. (C) 2019 Elsevier B.V. All rights reserved.
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页数:5
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