Your browser doesn't support javascript.
loading
Unusual Pd nanoparticle dispersion in microenvironment for p-nitrophenol and methylene blue catalytic reduction.
Subhan, Fazle; Aslam, Sobia; Yan, Zifeng; Yaseen, Muhammad.
Affiliation
  • Subhan F; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China; Department of Chemistry, Abdul Wali Khan University Mardan, K.P. Pakistan. Electronic address: fazle@awkum.edu.pk.
  • Aslam S; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China; Department of Chemistry, Abdul Wali Khan University Mardan, K.P. Pakistan.
  • Yan Z; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China. Electronic address: zfyancat@upc.edu.cn.
  • Yaseen M; Institute of Chemical Sciences, University of Peshawar, 25120 KP, Pakistan.
J Colloid Interface Sci ; 578: 37-46, 2020 Oct 15.
Article in En | MEDLINE | ID: mdl-32504904
ABSTRACT
Palladium based catalysts are highly attractive for catalytic reactions. However, the catalytic activity is dependent on the dispersion and size of Pd nanoparticles (NPs). Herein, an efficient strategy is developed to regulate the size and dispersion of Pd NPs in nanoconfined spaces provided by Santa Barbara Amorphous-15 (SBA-15) occluded with template. The Pd precursor is introduced to the confined spaces between the template and silica walls in as-synthesized SBA-15 (AS) by grinding. Subsequent reduction allow template removal and precursor conversion to Pd0 in single step and avoids aggregation that take place in calcined SBA-15 (CS). Our results show that up to 1.0 wt% of Pd can be well dispersed in confined spaces of AS (denoted as 1.0PdAS), while sever aggregation take place from CS with the same Pd loading (denoted as1.0PdCS). We also demonstrated that 1.0PdAS is highly efficient for catalytic reduction of p-nitrophenol (P-NP) and Methylene blue (MB) with rate constant of 0.4924 and 0.626 min-1, respectively, which is superior than 1.0PdCS attributed to well dispersed and smaller size (3 nm) Pd NPs. Furthermore, no change in the rate constant of P-NP (0.4924 min-1) and MB (0.626 min-1) after regeneration presents good stability of 1.0PdAS in catalytic reactions.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: J Colloid Interface Sci Year: 2020 Type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: J Colloid Interface Sci Year: 2020 Type: Article