Photocatalytic TiO2 thin films by aerosol-deposition: From micron-sized particles to nano-grained thin film at room temperature

Use of the electron microscope to examine wet objects is possible due to the small mass thickness of the equilibrium pressure of water vapor at room temperature. Previous attempts to examine hydrated biological objects and water itself used a chamber consisting of two small apertures sealed by two thin films. Extensive work in our laboratory showed that such films have an 80% failure rate when wet. Using the principle of differential pumping of the microscope column, we can use open apertures in place of thin film windows.Fig. 1 shows the modified Siemens la specimen chamber with the connections to the water supply and the auxiliary pumping station. A mechanical pump is connected to the vapor supply via a 100μ aperture to maintain steady-state conditions.

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A facile room temperature chemical transformation approach for binder-free thin film formation of Ag2Te and lithiation/delithiation chemistry of the film

Dalton Transactions ◽

10.1039/c6dt03038f ◽

2016 ◽

Vol 45 (43) ◽

pp. 17312-17318 ◽

Cited By ~ 9

Author(s):

Eun-Kyung Kim ◽

Dasom Park ◽

Nabeen K. Shrestha ◽

Jinho Chang ◽

Cheol-Woo Yi ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Aqueous Solution ◽

Ion Exchange ◽

Chemical Transformation ◽

Room Temperature ◽

Film Formation ◽

Synthetic Method ◽

Binder Free ◽

Thin Film Formation

An aqueous solution based synthetic method for binder-free Ag2Te thin films using ion exchange induced chemical transformation of Ag/AgxO thin films.

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Synthesis of CaWO4:(Eu3+,Tb3+) Thin Films by a Two-Step Method at Room Temperature

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.710.170 ◽

2013 ◽

Vol 710 ◽

pp. 170-173

Author(s):

Lian Ping Chen ◽

Yuan Hong Gao

Keyword(s):

Thin Film ◽

Thin Films ◽

Phase Composition ◽

Room Temperature ◽

Electrochemical Techniques ◽

Luminescent Properties ◽

X Ray Diffraction ◽

Step Method ◽

X Ray ◽

Rare Earth Doped

It is hardly possible to obtain rare earth doped CaWO4thin films directly through electrochemical techniques. A two-step method has been proposed to synthesize CaWO4:(Eu3+,Tb3+) thin films at room temperature. X-ray diffraction, energy dispersive X-ray analysis, spectrophotometer were used to characterize their phase, composition and luminescent properties. Results reveal that (Eu3+,Tb3+)-doped CaWO4films have a tetragonal phase. When the ratio of n (Eu)/n (Tb) in the solution is up to 3:1, CaWO4:(Eu3+,Tb3+) thin film will be enriched with Tb element; on the contrary, when the ratio in the solution is lower than 1:4, CaWO4:(Eu3+,Tb3+) thin film will be enriched with Eu element. Under the excitation of 242 nm, sharp emission peaks at 612, 543, 489 and 589 nm have been observed for CaWO4:(Eu3+,Tb3+) thin films.

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Microstructure Evolution of Ag/TiO2 Thin Film

Magnetochemistry ◽

10.3390/magnetochemistry7010014 ◽

2021 ◽

Vol 7 (1) ◽

pp. 14

Author(s):

Dewi Suriyani Che Halin ◽

Kamrosni Abdul Razak ◽

Mohd Arif Anuar Mohd Salleh ◽

Mohd Izrul Izwan Ramli ◽

Mohd Mustafa Al Bakri Abdullah ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Growth Rate ◽

Synchrotron Radiation ◽

Tio2 Thin Film ◽

Sol Gel ◽

Tio2 Thin Films ◽

Contact Mode ◽

X Ray ◽

Radiation Imaging

Ag/TiO2 thin films were prepared using the sol-gel spin coating method. The microstructural growth behaviors of the prepared Ag/TiO2 thin films were elucidated using real-time synchrotron radiation imaging, its structure was determined using grazing incidence X-ray diffraction (GIXRD), its morphology was imaged using the field emission scanning electron microscopy (FESEM), and its surface topography was examined using the atomic force microscope (AFM) in contact mode. The cubical shape was detected and identified as Ag, while the anatase, TiO2 thin film resembled a porous ring-like structure. It was found that each ring that coalesced and formed channels occurred at a low annealing temperature of 280 °C. The energy dispersive X-ray (EDX) result revealed a small amount of Ag presence in the Ag/TiO2 thin films. From the in-situ synchrotron radiation imaging, it was observed that as the annealing time increased, the growth of Ag/TiO2 also increased in terms of area and the number of junctions. The growth rate of Ag/TiO2 at 600 s was 47.26 µm2/s, and after 1200 s it decreased to 11.50 µm2/s and 11.55 µm2/s at 1800 s. Prolonged annealing will further decrease the growth rate to 5.94 µm2/s, 4.12 µm2/s and 4.86 µm2/s at 2400 s, 3000 s and 3600 s, respectively.

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A tunable volatile organic compound sensor by using PtOx/GQDs/TiO2 nanocomposite thin films at room temperature under visible-light activation

RSC Advances ◽

10.1039/c7ra07478f ◽

2017 ◽

Vol 7 (63) ◽

pp. 39859-39868 ◽

Cited By ~ 3

Author(s):

Shaofeng Shao ◽

Yunyun Chen ◽

Shenbei Huang ◽

Fan Jiang ◽

Yunfei Wang ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Visible Light ◽

Gas Sensors ◽

Room Temperature ◽

Light Activation ◽

Nanocomposite Thin Film ◽

Nanocomposite Thin Films ◽

Volatile Organic ◽

Visible Light Activation

Pt/GQDs/TiO2 nanocomposite thin film-based gas sensors show tunable VOC sensing behaviour at room temperature under visible-light activation.

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Irradiation induced ferromagnetism at room temperature in TiO2 thin films: X-ray magnetic circular dichroism characterizations

Applied Physics Letters ◽

10.1063/1.3592250 ◽

2011 ◽

Vol 98 (19) ◽

pp. 192512 ◽

Cited By ~ 20

Author(s):

Hardeep Thakur ◽

P. Thakur ◽

Ravi Kumar ◽

N. B. Brookes ◽

K. K. Sharma ◽

...

Keyword(s):

Thin Films ◽

Circular Dichroism ◽

Room Temperature ◽

Magnetic Circular Dichroism ◽

Tio2 Thin Films ◽

X Ray ◽

Circular Dichroïsm

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Substrate effects on the room-temperature ferromagnetism in Co-doped TiO2 thin films grown by pulsed laser deposition

Journal of Applied Physics ◽

10.1063/1.1669111 ◽

2004 ◽

Vol 95 (11) ◽

pp. 7378-7380 ◽

Cited By ~ 29

Author(s):

Hoa Hong Nguyen ◽

W. Prellier ◽

Joe Sakai ◽

Antoine Ruyter

Keyword(s):

Thin Films ◽

Pulsed Laser Deposition ◽

Room Temperature ◽

Room Temperature Ferromagnetism ◽

Pulsed Laser ◽

Laser Deposition ◽

Tio2 Thin Films ◽

Substrate Effects ◽

Doped Tio2 ◽

Co Doped

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Formation of ZnO Doped with Mn Thin Film by Electrodeposition and Magnetic Behaviour.

MRS Proceedings ◽

10.1557/proc-879-z7.17 ◽

2005 ◽

Vol 879 ◽

Author(s):

M. Abid ◽

C. Terrier ◽

J-P Ansermet ◽

K. Hjort

Keyword(s):

Thin Film ◽

Thin Films ◽

Room Temperature ◽

Magnetic Behaviour ◽

Spectroscopic Methods ◽

X Ray Diffraction ◽

X Ray ◽

Doped Zno ◽

Mn Doped ◽

Weak Ferromagnetic

AbstractFollowing the theory, ferromagnetism is predicted in Mn- doped ZnO, Indeed, ferromagnetism above room temperature was recently reported in thin films as well as in bulk samples made of this material. Here, we have prepared Mn doped ZnO by electrodeposition. The samples have been characterized by X-ray diffraction and spectroscopic methods to ensure that the dopants are substitutional. Some samples exhibit weak ferromagnetic properties at room temperature, however to be useful for spintronics this material need additional carriers provided by others means.

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Photocatalytic Degradation of Different VOCs in the Gas-Phase over TiO2 Thin Films Prepared by Ultrasonic Spray Pyrolysis

Catalysts ◽

10.3390/catal9110915 ◽

2019 ◽

Vol 9 (11) ◽

pp. 915 ◽

Cited By ~ 4

Author(s):

Ibrahim Dundar ◽

Marina Krichevskaya ◽

Atanas Katerski ◽

Malle Krunks ◽

Ilona Oja Acik

Keyword(s):

Thin Film ◽

Thin Films ◽

Photocatalytic Degradation ◽

Spray Pyrolysis ◽

Tio2 Thin Film ◽

Ultrasonic Spray Pyrolysis ◽

Airflow Rate ◽

Tio2 Films ◽

Tio2 Thin Films ◽

Ultrasonic Spray

In this study, we deposited TiO2 thin films onto borosilicate glass by ultrasonic spray pyrolysis at 350 and 450 °C. The aim of study is to determine the effect of deposition temperature on photocatalytic activity of TiO2 thin films and to investigate the performance of TiO2 thin films on photocatalytic degradation of methyl tert-butyl ether (MTBE), acetone, acetaldehyde, and heptane as functions of different operating parameters. TiO2 thin films deposited at 350 and 450 °C have a thickness value of 190 and 330 nm, respectively. All as-prepared TiO2 films possess an anatase crystalline structure. According to the X-ray photon spectroscopy (XPS) study, the TiO2 thin film deposited at 350 °C showed a higher amount of oxygen vacancies and hydroxyl groups on the film surface after UV treatment. The aged-TiO2 thin film deposited at 350 °C showed a water contact angle (WCA) value of 0° after 10 min UV irradiation, showing superhydrophilic surface behavior. The TiO2 film deposited at 350 °C exhibited the highest amount of conversion of MTBE (100%). The results also showed that TiO2 films are capable of photocatalytic degradation of MTBE (100%) and acetaldehyde (approx. 80%) in humid air conditions and high airflow rate. The visible-light-activity of TiO2 thin films was tested with 5 ppm MTBE and acetone. TiO2 thin films deposited at 350 °C with a surface area of 600 cm2 showed 60% of MTBE and 33% of acetone degradation under VIS light.

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