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In situ α-Fe2O3 modified La2Ti2O7 with enhanced photocatalytic CO2 reduction activity
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2021-08-19 , DOI: 10.1039/d1cy01275d Zifan Zhang 1 , Yuan Lin 1 , Qianwen Liu 1 , Xuxu Wang 1 , Xianzhi Fu 1 , Wenyue Su 1
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2021-08-19 , DOI: 10.1039/d1cy01275d Zifan Zhang 1 , Yuan Lin 1 , Qianwen Liu 1 , Xuxu Wang 1 , Xianzhi Fu 1 , Wenyue Su 1
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Developing high-efficiency photocatalysts for CO2 photoreduction is one of the potential solutions to address both energy and pollution issues. In this study, α-Fe2O3 modified La2Ti2O7 was successfully synthesized with intimate contact between La2Ti2O7 and α-Fe2O3, greatly facilitating the carrier separation and transfer during the photocatalytic reaction. The activity and stability for photocatalytic CO2 reduction over α-Fe2O3/La2Ti2O7 were significantly improved as compared with the La2Ti2O7 substrate. The optimized 3% α-Fe2O3/ La2Ti2O7 composite showed excellent CO2 reduction activity after 5 h consecutive illumination, and the total utilized photoelectron number (UPN) reached 7.76 μmol, which was about 4.4 times higher than that of the pristine La2Ti2O7. The steady-state photoluminescence spectra, time-resolved photoluminescence spectra (TRPL) and photocurrent response results showed that the improved charge separation efficiency was the key factor to enhance the photocatalytic activity. This work provides novel insights into the design and fabrication of photocatalysts of high performance for CO2 reduction for solar-to-energy applications.
中文翻译：
具有增强的光催化 CO2 还原活性的原位 α-Fe2O3 改性 La2Ti2O7
开发用于 CO 2光还原的高效光催化剂是解决能源和污染问题的潜在解决方案之一。在这项研究中，α-Fe 2 O 3改性的La 2 Ti 2 O 7被成功合成，La 2 Ti 2 O 7和α-Fe 2 O 3之间紧密接触，极大地促进了光催化反应过程中的载流子分离和转移。α-Fe 2 O 3 /La 2 Ti 2光催化还原CO 2的活性和稳定性与La 2 Ti 2 O 7基板相比，O 7得到了显着改善。优化后的 3% α-Fe 2 O 3 / La 2 Ti 2 O 7复合材料在连续照射 5 h 后表现出优异的 CO 2还原活性，总利用光电子数（UPN）达到 7.76 μmol，约为原始的 La 2 Ti 2 O 7. 稳态光致发光光谱、时间分辨光致发光光谱（TRPL）和光电流响应结果表明，提高电荷分离效率是提高光催化活性的关键因素。这项工作为太阳能转化为能源应用的CO 2还原高性能光催化剂的设计和制造提供了新的见解。
更新日期：2021-09-02
中文翻译：
具有增强的光催化 CO2 还原活性的原位 α-Fe2O3 改性 La2Ti2O7
开发用于 CO 2光还原的高效光催化剂是解决能源和污染问题的潜在解决方案之一。在这项研究中，α-Fe 2 O 3改性的La 2 Ti 2 O 7被成功合成，La 2 Ti 2 O 7和α-Fe 2 O 3之间紧密接触，极大地促进了光催化反应过程中的载流子分离和转移。α-Fe 2 O 3 /La 2 Ti 2光催化还原CO 2的活性和稳定性与La 2 Ti 2 O 7基板相比，O 7得到了显着改善。优化后的 3% α-Fe 2 O 3 / La 2 Ti 2 O 7复合材料在连续照射 5 h 后表现出优异的 CO 2还原活性，总利用光电子数（UPN）达到 7.76 μmol，约为原始的 La 2 Ti 2 O 7. 稳态光致发光光谱、时间分辨光致发光光谱（TRPL）和光电流响应结果表明，提高电荷分离效率是提高光催化活性的关键因素。这项工作为太阳能转化为能源应用的CO 2还原高性能光催化剂的设计和制造提供了新的见解。
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