钛-硅复合氧化物比表面积的影响因素研究

doi:10.11962/1006-4990.2020-0016

Abstract

Abstract:

TiO₂-SiO₂ composite oxide was prepared by sol-gel method using inorganic salts.The surface area of composite oxide materials was tested and analyzed by N₂-adsorption method,and the factors,such as ratio of raw materials,feeding ways,surface active agent,reaction temperature,aging temperature,aging time and calcination temperature etc.,on the specific surface area of composite oxide were investigated.Results showed that when the mass fraction of TiO₂ was 22%,additive was CTAB,reaction temperature was 30 ℃,aging temperature was 70 ℃,aging time was 1 h and calcination temperature was 150 ℃,then the specific surface area of prepared composite oxide was 361.4 m²/g,pore volume was 1.18 cm³/g and the average pore size was 13.0 nm.Different factors all had certain influence on the surface area,the composite oxide pore structure can controlled according to rules.

Key words: titanium silicon, composite oxide, specific surface area

CLC Number:

TQ134.11

Guo Qiushuang,Wu Tongxu,Cai Zhe,Cai Qi,Li Xiaoyun,Sun Yanmin. Study on influence factors of specific surface area of Ti-Si composite oxides[J]. Inorganic Chemicals Industry, 2020, 52(12): 109-112.

Figures/Tables 9

References 8

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w （TiO₂）/ %	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm	w （TiO₂）/ %	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm
0	325.8	1.41	17.3	60	319.6	0.52	6.5
15	334.4	1.22	14.2	80	217.6	0.51	9.3
22	345.1	0.98	11.3	100	95.6	0.18	7.5
40	321.5	0.62	7.7

加料方式	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm	加料方式	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm
正加	370.5	0.95	10.2	并加	412.5	0.70	6.8
反加	341.4	1.08	12.6

表面活性剂	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm	表面活性剂	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm
无	341.4	1.08	12.6	CTAB	375.4	1.28	13.7
PEG- 2000	315.8	1.10	13.9	乌洛托品	340.6	1.19	14.0

反应温度/℃	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm	反应温度/℃	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm
30	375.4	1.28	13.7	70	277.0	1.20	17.4
50	326.1	1.22	14.9	90	279.3	1.27	17.6

老化温度/℃	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm	老化温度/℃	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm
30	468.0	1.24	10.5	70	375.4	1.28	13.7
50	417.8	1.22	11.6	90	341.4	1.25	14.6

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on influence factors of specific surface area of Ti-Si composite oxides

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焙烧温度/℃	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm	焙烧温度/℃	比表面积/ （m²·g^-1）	孔容/（cm³·g^-1）	孔径/ nm
150	361.4	1.18	13.0	550	258.2	1.02	15.8
250	329.3	1.12	13.6	750	224.7	0.91	16.2
350	291.8	1.10	15.1	950	153.2	0.61	16.3
450	267.0	1.00	15.0

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