Herein, Ni²⁺ species-doped and TS-1-coupled porous LaFeO₃ nanocomposites have been successfully fabricated via carbon nanospheres (CNS) in a sequential template approach (STA). XPS, inductively coupled plasma emission spectroscopy (ICP-AES), TEM, DRS, fluorescence spectra related to ˙OH amount, photoelectrochemical I–V curves, TPD and BET results have confirmed that the introduction of pores increased the surface area, and the incorporation of Ni²⁺ species extended the light absorption capability by creating surface states and optimizing the band gap positions. The coupling of TS-1 performed the dual function of expanding the surface area and enhancing the charge separation by upgrading high-level energy electrons. Compared to the pristine porous LaFeO₃, the optimized 3Ni-PLFO and 5TS/3Ni-PLFO nanocomposites have suitable band gap positions and efficient visible-light photocatalytic activities for CO₂ reduction and 2,4,6-trinitrophenol degradation. Interestingly, compared to PLFO, the resulting 5TS/3Ni-PLFO nanocomposite showed 2.5-times improvement for CO₂ reduction and 3-times improvement for 2,4,6-trinitrophenol (TNP) degradation. It was confirmed from radical trapping experiments that the photogenerated holes and ˙OH are the potent oxidants in the photocatalytic degradation of 2,4,6-trinitrophenol degradation. The single wavelength photocurrent action spectrum confirmed that the simultaneous doping of Ni²⁺ species and coupling of TS-1 optimized the band gap and upgraded HLEEs of LaFeO₃, respectively. This novel research approach opens a new gateway for synthesizing large surface area and visible-light-active efficient LaFeO₃-based photocatalysts for CO₂ conversion and environmental remediation.

中文翻译：

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通过同步掺杂 Ni2+ 和偶联 TS-1 来增强多孔 LaFeO3 的可见光光活性，用于 CO2 还原和 2,4,6-三硝基苯酚降解

在此，Ni ²⁺物种掺杂和TS-1 耦合的多孔LaFeO ₃纳米复合材料已通过碳纳米球（CNS）以顺序模板方法（STA）成功制备。XPS、电感耦合等离子体发射光谱 (ICP-AES)、TEM、DRS、与 ˙OH 量相关的荧光光谱、光电化学I - V曲线、TPD 和 BET 结果证实孔隙的引入增加了表面积，并且掺入镍²⁺物种通过创建表面状态和优化带隙位置来扩展光吸收能力。TS-1 的耦合通过升级高能电子来实现扩大表面积和增强电荷分离的双重功能。与原始多孔 LaFeO ₃相比，优化的 3Ni-PLFO 和 5TS/3Ni-PLFO 纳米复合材料具有合适的带隙位置和有效的可见光光催化活性，可用于 CO ₂还原和 2,4,6-三硝基苯酚降解。有趣的是，与 PLFO 相比，所得 5TS/3Ni-PLFO 纳米复合材料对 CO _{2 的性能}提高了 2.5 倍2,4,6-三硝基苯酚 (TNP) 降解的减少和 3 倍改进。自由基捕获实验证实，光生空穴和·OH是光催化降解2,4,6-三硝基苯酚的强氧化剂。单波长光电流作用光谱证实，Ni ²⁺物种的同时掺杂和TS-1的耦合分别优化了LaFeO ₃的带隙和升级的HLEE 。这种新颖的研究方法为合成大表面积和可见光活性高效 LaFeO ₃基光催化剂用于 CO ₂转化和环境修复开辟了新途径。