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Photocatalytic H2O2 production over Ti(HPO4)2 S-scheme heterojunction through push-pull electronic effects enhance the oxygen reduction
Shanyue He, Xin Zhang, Mei Chen, Hongquan Jiang, Yang Qu, Yanduo Liu, Jizhou Jiang
Composite Functional Materials ›› 2025, Vol. 1 ›› Issue (2) : 20250203.
PDF(19142 KB)
PDF(19142 KB)
Photocatalytic H2O2 production over Ti(HPO4)2 S-scheme heterojunction through push-pull electronic effects enhance the oxygen reduction
This study focuses on enhancing the photocatalytic performance of Ti(HPO4)2 for H2O2 synthesis. Ti(HPO4)2, an intercalated structure photocatalyst with suitable band gap energy, has great potential in photocatalytic applications. However, its performance in H2O2 photosynthesis needs improvement in oxygen reduction kinetics and electron lifetime. We employed oxygen vacancy engineering to modulate the local oxygen environment of Ti(HPO4)2. This process reconstructs the Ti3+-Ov-P structures by leveraging push-pull electronic effects to increase the electron density at Ti4+ sites, thereby enhancing O2 adsorption and activation. Moreover, we constructed an S-scheme heterojunction using WO3 as a complementary oxidative cocatalyst. This heterojunction effectively suppressed carrier recombination and preserved the intrinsic redox abilities of each component. The optimized WO3/TPOv showed remarkable performance in a pure H2O/O2 system without sacrificial agents. It exhibited a 15-fold activity enhancement over pristine TPO and achieved an SCC efficiency of 0.75%. Our work offers a novel strategy of defect and heterojunction engineering for optimizing carrier lifetime and surface reactivity in photocatalytic systems.
Ti(HPO4)2 / push-pull electronic effects / photocatalytic H2O2 production / S-scheme heterojunction
| [1] |
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| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
|
| [30] |
|
| [31] |
|
| [32] |
|
| [33] |
|
| [34] |
|
| [35] |
|
| [36] |
|
| [37] |
|
| [38] |
|
| [39] |
|
| [40] |
|
| [41] |
|
| [42] |
|
| [43] |
|
| [44] |
|
| [45] |
|
| [46] |
|
| [47] |
|
| [48] |
|
| [49] |
|
| [50] |
|
| [51] |
|
| [52] |
|
| [53] |
|
| [54] |
|
| [55] |
|
| [56] |
|
| [57] |
|
| [58] |
|
| [59] |
|
| [60] |
|
| [61] |
|
| [62] |
|
| [63] |
|
| [64] |
|
| [65] |
|
| [66] |
|
| [67] |
|
| [68] |
Chinthala Praveen Kumar. Neeruganti Obularajugari Gopal, Ting Chung Wang, Mingshow Wong, Shyue Chu Ke. EPR investigation of TiO2 nanoparticles with temperature-dependent properties. The Journal of Physical Chemistry B, 2006, 110, 5223-5229. https://doi.org/10.1021/jp057053t
|
| [69] |
|
| [70] |
|
| [71] |
|
| [72] |
|
| [73] |
|
| [74] |
|
| [75] |
|
| [76] |
|
| [77] |
|
| [78] |
|
| [79] |
|
| [80] |
|
| [81] |
|
| [82] |
|
| [83] |
|
| [84] |
|
| [85] |
|
| [86] |
|
| [87] |
|
| [88] |
|
| [89] |
|
| [90] |
|
| [91] |
|
The authors acknowledge support from National Natural Science Foundation of China (Nos. U24A2071, 62004143), the Key Project of Scientific Research Plan of Hubei Provincial Department of Education (No. D20241501).
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