Multifunctional Ag/TiO2/MCM-41 nanocomposite film applied for indoor air treatment

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Tongon W., Chawengkijwanich C., Chiarakorn S.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2014

วารสาร: Building and Environment (0360-1323)

Volume number: 82

หน้าแรก: 481

หน้าสุดท้าย: 489

จำนวนหน้า: 9

นอก: 0360-1323

eISSN: 1873-684X

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908118365&doi=10.1016%2fj.buildenv.2014.09.014&partnerID=40&md5=94bbd74c96e69b6b86bafeed04bdca84

ภาษา: English-Great Britain (EN-GB)

ดูในเว็บของวิทยาศาสตร์ | ดูบนเว็บไซต์ของสำนักพิมพ์ | บทความในเว็บของวิทยาศาสตร์

บทคัดย่อ

In this study, the indoor applications of Ag/TiO2/MCM-41 nanocomposite films were investigated under visible light. The coatings were prepared using a microwave-assisted sol-gel method, according to the following molar ratio: 1Ti(OC4H9)4: 18CH3CH2OH:0.5C5H8O2: 2H2O: 0.2HNO3: 0.1AgNO3: 2SiO2. The XRD characterisations and TEM images indicated the presence of anatase TiO2, Ag nanoparticles and mesoporous MCM-41 within the Ag/TiO2/MCM-41 nanocomposite films themselves. The results of UV-visible spectroscopy revealed a significant increase in both UV and visible light absorption when Ag and MCM-41 were incorporated into the TiO2 film. The water-contact angle measurements showed that the surface of the nanocomposite film exhibited superhydrophilicity, which is a desirable property in the self-cleaning process. The application of an Ag/TiO2/MCM-41 nanocomposite film for gaseous benzene removal was carried out in a simulated indoor air system. The photodegradation efficiencies were arranged in the order of Ag/TiO2/MCM-41 (55%)>Ag/TiO2 (28%)>TiO2 (15%), respectively. The photodegradation kinetics of gaseous benzene on Ag/TiO2/MCM-41 nanocomposite films matched accordingly with the first-order model. The kinetic constants of TiO2, Ag/TiO2 and Ag/TiO2/MCM-41 nanocomposite films, irradiated under visible light, were measured at 0.015, 0.025 and 0.135h-1, respectively. Their degradation rates were measured at 0.273, 0.609 and 6.321gL-1h-1, respectively. The antimicrobial activity of the Ag/TiO2/MCM-41 nanocomposite film against gram-negative Escherichia coli (E.coli) was evaluated under fluorescent lighting, following the JIS Z 2801:2000 standard. The percentage reductions (%R) of E.coli seeded onto TiO2 films and Ag/TiO2/MCM-41 nanocomposite films were measured at approximately 55% and 98%, respectively, under fluorescent lighting. ฉ 2014 Elsevier Ltd.

คำสำคัญ

Ag/TiO2/MCM-41, Indoor air treatment, Nanocomposite film