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Fabrication and Functionalization of Other Inorganic Nanoparticles and Nanocomposites
Published in Vineet Kumar, Praveen Guleria, Nandita Dasgupta, Shivendu Ranjan, Functionalized Nanomaterials I, 2020
Kiranmai Mandava, Uma Rajeswari B.
Tin oxide, an n-type semiconductor, has been extensively used as gas sensor. Therefore, a sensor was developed using tin oxide nanoparticles fabricated by a chloride solution combustion synthesis method to detect volatile organic compound indoor pollutants. Nevertheless, the major drawback of this gas sensor is that it is unable to distinguish a specified compound when they are exposed to a mixture of reducing gases (Norouz-Oliaee et al., 2010). To overcome this disadvantage, the tin oxide sensor was doped with samarium oxide (Sm2O3), a rare earth metal oxide, using the chloride solution combustion synthesis method (Habibzadeh et al., 2010; Ahmadnia-Feyzabada et al., 2013). A new method was also reported to improve the gas-sensing properties by functionalizing networked tin oxide nanowires with silver and palladium nanoparticles using X-ray radiolysis (Choi et al., 2012).
First Principles Calculations in Exploring the Magnetism of Oxide-Based DMS
Published in Jiabao Yi, Sean Li, Functional Materials and Electronics, 2018
Tin dioxide (SnO2) is always in a rutile form with tin atoms at octahedral coordinated positions and oxygen atoms at trigonal planar coordinated positions [94] (as depicted in Fig. 7.10). The lattice constant of SnO2 is a = b = 4.373 A, c = 3.185 A from experiments [95]. SnO2 is a typical n-type semiconductor with a wide band gap of about 3.7 eV. It is a multifunctional oxide which exhibits many interesting properties, such as transparency, conductivity, and ferromagnetism at low dimensional structures [96].
Anion doping enabling SnO2 superior electrocatalytic performances for vanadium redox reactions
Published in International Journal of Green Energy, 2022
Xiaojian Feng, Yujie Yang, Yujie Ren, Yanrong Lv, Zhehao Qu, Yingqiao Jiang, Qingchun Jiang, Yongguang Liu, Yuehua Li, Lei Dai, Ling Wang, Zhangxing He
F-doped SnO2 nanomaterials were prepared by a sol–gel method. 2.2465 g SnCl2·2 H2O (Sinopharm Chemical Reagent Co. Ltd., AR) was used as tin source and hydrofluoric acid was used as the F source. First, SnCl2·2 H2O was placed in 20 mL anhydrous ethanol. Then, the SnCl2 was fully dissolved in ethanol by ultrasonic for 30 min. The resulting clear and lucid solution was heated at 65 ℃ in a water bath. The resulting solution was stirred for 2 h until a light-yellow gel was formed. HF (Tianjin Institute of Chemical Reagents, 40 wt.%) was weighed according to the mass ratios of 5%, 10%, and 20%. The solution was then continuously stirred until it gelled. The resulting gel was aged at room temperature for 24 h and then dried in an oven for 10 h at 80 ℃. The obtained solid powder was calcined in a muffle furnace for 2 h at 600 ℃. Samples with different F doping ratios were named SnO2/F-5, SnO2/F-10, and SnO2/F-20, respectively. Following the same procedure, a sample of undoped tin dioxide was synthesized, named SnO2.
Comparison of the melting properties of glass substrates for thin film transistor liquid crystal display and organic light-emitting diode
Published in Journal of Asian Ceramic Societies, 2021
Jiedong Cui, Xin Cao, Fengyang Zhao, Zhaojin Zhong, Na Han
In mass production of glass industry, stannous oxide SnO and tin dioxide SnO2 were both used as fining agent. SnO is a kind of redox fining agent, which can absorb O2 and release O2 by changing the valence of tin ion. The fining mechanism is as follows: SnO reacts with oxygen to form SnO2 when the temperature is lower than 800°C, and when the temperature is higher than 1400°C, the high valence SnO2 releases O2 through the decomposition, and the released O2 diffuses into the bubbles in the glass melt, absorbing and merging other bubbles in the melt. Then, the bubbles increase and float, and finally ascend to escape from the glass melt. SnO2 is also a kind of fining agent, whose decomposition formula is as follows: 2SnO2 ↔ 2SnO+O2↑. The fining effect between them was studied.
Preparation and photocatalytic kinetic study of ternary composite photocatalyst 12-phosphotungstic acid/PANI/SnO2
Published in Journal of Coordination Chemistry, 2019
Figure 1 shows the infrared spectrum of SnO2, PANI/SnO2 and composite catalyst PW12/PANI/SnO2. SnO2 has a Sn-O stretch absorption at 623 cm−1 consistent with related reports [7]. Characteristic absorption peaks of polyaniline are seen at 1506 cm−1, 1356 cm−1 and 1191 cm−1; the peak at 1506 cm−1 is attributed to C = C stretch in the benzene ring, the peak at 1356 cm−1 represents the stretching vibration mode of C-N in Ar-NH-Ar, and the peak at 1143 cm−1 is the absorption of N-Ar-N. Comparing with the eigenstate polyaniline absorption peak (1677 cm−1, 1494 cm−1 and 1187 cm−1) [8], different degrees of red-shift occurred. This is because the hydrogen bond between PANI and SnO2 causes a decrease in the force constant. The characteristic absorptions of Keggin structure heteropoly acid PW12 appeared at 700–1100 cm−1, 1080 cm−1, 983 cm−1, 891 cm−1 and 799 cm−1 [9]. The photocatalyst is composed of polyaniline, tin dioxide and phosphotungstic acid.