Journal article 185 views 51 downloads
A non-doped microporous titanosilicate for bimodal adsorption-photocatalysis based removal of organic water pollutants
,
Patrick M. Melia ,
Reece M.D. Bristow ,
James McGettrick ,
Richard J. Singer,
Joseph C. Bear ,
Rosa Busquets
Microporous and Mesoporous Materials, Volume: 345, Start page: 112276
Swansea University Author:
James McGettrick
-
PDF | Version of Record
© 2022 The Authors.This is an open access article under the CC BY-NC-ND license
Download (3.93MB)
DOI (Published version): 10.1016/j.micromeso.2022.112276
Abstract
Access to clean drinking water is limited for millions around the world and lead to dire health and economic ramifications, particularly in developing nations. This study explores a recyclable, low-cost, non-doped, microporous titanosilicate for effective removal of organic water pollutants. Rhodami...
| Published in: | Microporous and Mesoporous Materials |
|---|---|
| ISSN: | 1387-1811 |
| Published: |
Elsevier BV
2022
|
| Online Access: |
Check full text
|
| URI: | https://cronfa.swan.ac.uk/Record/cronfa61556 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Abstract: |
Access to clean drinking water is limited for millions around the world and lead to dire health and economic ramifications, particularly in developing nations. This study explores a recyclable, low-cost, non-doped, microporous titanosilicate for effective removal of organic water pollutants. Rhodamine B was utilized as a modal pollutant to explore and optimize the activity of the titanosilicate, which evidently occurred via an adsorption and subsequent photocatalytic degradation based bimodal mechanism. The novel titanosilicate has high surface area (SBET of 468 m2/g), is microporous (∼1.3 nm pore diameter), achieved via a surfactant templating technique. Its’ physicochemical properties were characterised using FTIR, Raman, BET, SEM, PXRD and XPS. The photocatalytic activity of the material was studied under a solar simulator via time dependent UV–vis absorption measurements. The material showed 97% removal of Rhodamine B (5 mg/L) within 3 h, and outperformed nanosized titanium dioxide (anatase:rutile 4:1), the most conventionally used photocatalyst in tertiary water treatment. Interestingly, the titanosilicate displayed a dual mechanism of pollutant removal: an initial rapid removal of 59% due to adsorption during a 30 min equilibrating step in the dark, followed by near complete removal within 3 h. Additionally, a >90% efficiency of Rhodamine B removal by the titanosilicate catalyst was achieved consistently throughout 4 cycles, demonstrating its ability for regeneration and reusability. Such activity has not been previously reported in non-doped or non-composite titanosilicates, and opens up pathways to efficient, low-cost water treatment materials, consisting only of environmentally benign raw materials and synthetic procedures. |
|---|---|
| Keywords: |
Photocatalysis; TiO2 alternative; Advanced oxidation; Water treatment; Porous adsorbent |
| College: |
Faculty of Science and Engineering |
| Funders: |
The authors gratefully acknowledge the funding provided by UKRI HEFCE-GCRF grant and the Department of Chemical and Pharmaceutical Sciences at Kingston University. |
| Start Page: |
112276 |