二氧化钛基纳米材料优化改性的研究进展

doi:10.19964/j.issn.1006-4990.2024-0405

Abstract

Abstract:

In the context of the escalating severity of global environmental pollution and energy challenges，TiO₂ nanomaterials，being a crucial semiconductor material with their outstanding photocatalytic performance，have demonstrated tremendous potential in the domains of solar energy utilization，clean energy production，and environmental pollution purification.Nevertheless，TiO₂ possesses a large band gap，with its light absorption predominantly confined to the ultraviolet region，its surface adsorption capacity being weak，and the recombination rate of photogenerated electron-hole pairs being high，leading to its restricted catalytic efficiency in visible light，which significantly constrains its extensive application in practical scenarios.An in-depth analysis of the mechanism of TiO₂ photocatalysis was conducted and the strategies such as compound modification，elemental doping，hydrogenation treatment were deliberated，and the introduction of oxygen vacancy and Ti³⁺ defects，which effectively enhanced the catalytic efficiency in visible light.Finally，the main directions for the optimized modification of TiO₂-based nanomaterials were prospected，which could effectively broaden the application scope in the two key fields of environmental protection and energy utilization，improve its efficiency in pollutant degradation and clean energy transformation，etc，and offer ideas and references for the development of new TiO₂-based nanomaterials with high catalytic activity.

Key words: titanium dioxide, degradation mechanism, doping modification, photocatalysis

CLC Number:

TQ134.11

WANG Xiaoyu, DU Ruicheng, LI Yan, YANG Shuyan. Research advances in optimization and modification of TiO₂-based nanomaterials[J]. Inorganic Chemicals Industry, 2025, 57(7): 24-34.

Figures/Tables 9

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催化剂	晶体相		晶格参数
催化剂	锐钛矿/nm	金红石/nm	a/Å	b/Å	c/Å	单胞体积/Å³
TiO₂（P-25）	22.64	32.78	3.788	3.788	9.531	136.76
Pt-TiO₂	22.28	28.78	3.785	3.785	9.545	136.74
Au-TiO₂	22.56	29.00	3.786	3.786	9.507	136.27
Pd-TiO₂	22.02	26.04	3.785	3.785	9.541	136.69

催化剂	w（Pt，Au，Pd）/%	BET表面积/ （m²·g^-1）	k/ （10⁴ s^-1）	R/（10⁸ mol·L^-1·s^-1）	ξ/%
TiO₂	0.0	50.46	3.88	7.76	7.68
Pt-TiO₂	0.4	31.13	4.42	8.84	8.75
	0.8	29.17	10.50	21.00	20.79
	1.2	20.45	5.87	11.74	11.62
	1.6	19.57	4.98	9.96	9.86
Au-TiO₂	0.4	46.14	7.38	14.76	14.61
	0.8	45.71	10.43	20.86	20.65
	1.2	45.36	5.52	11.03	10.92
	1.6	45.09	4.72	9.44	9.35
Pd-TiO₂	0.05	40.08	4.75	9.50	9.40
	0.10	37.82	4.50	9.00	8.91
	0.15	36.49	4.35	8.70	8.61
	0.20	35.10	3.90	7.80	7.72

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Research advances in optimization and modification of TiO₂-based nanomaterials

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Research advances in optimization and modification of TiO2-based nanomaterials