Low cost and large-scale fabrication of high-efficiency near-infrared (NIR) photocatalysts are especially promising for the degradation of organic pollutants. Herein, a facile in-situ etching method by growing BiOCl nanosheets on self-crystallized upconversion SrO-Bi₂O₃-B₂O₃ (SBBO) glass-ceramic (GC) is developed to synthesize an efficient NIR GC photocatalyst. Through structure and morphology characterizations, it is found that the NIR GC photocatalyst possesses the core-shell structure, where the SBBO GC micro-powders including optically active centers (Er³⁺, Yb³⁺, and Y³⁺) doped SrF₂ nanocrystals are displayed as the cores, and the BiOCl is as the superficial coating. The NIR GC photocatalysts can efficiently harvest the NIR photons and emit strong UV (379 nm), violet (408 nm), green (523 and 540 nm), and red (656 nm) light, which are able to be utilized by themselves for photocatalysis. In the degradation of organic pollutants under NIR irradiation for 90 min, high removal rates of 66 % (antibiotic norfloxacin) and 79 % (methyl orange) are achieved. Furthermore, the NIR GC photocatalyst can be facile regenerated by using HCl etching again, and suitable for large-scale fabrication that will supply a new strategy for development of efficient photocatalyst.

低成本，高效率地制造高效率的近红外（NIR）光催化剂对于有机污染物的降解尤其有希望。在本文中，开发了一种通过在自结晶上转换SrO-Bi ₂ O ₃ -B ₂ O ₃（SBBO）玻璃陶瓷（GC）上生长BiOCl纳米片的简便原位蚀刻方法来合成高效的NIR GC光催化剂。通过结构和形态表征，发现NIR GC光催化剂具有核-壳结构，其中SBBO GC微粉包括光学活性中心（Er ³⁺，Yb ³⁺和Y ³⁺）掺杂了SrF _2。纳米晶体被展示为核心，而BiOCl被展示为表面涂层。NIR GC光催化剂可以有效地收集NIR光子，并发出强紫外线（379 nm），紫色（408 nm），绿色（523和540 nm）和红色（656 nm）的光，这些光可以自己用于光催化。在90分钟的NIR照射下降解有机污染物时，可实现66％（抗生素诺氟沙星）和79％（甲基橙）的高去除率。此外，可以通过再次使用HCl蚀刻轻松地再生NIR GC光催化剂，并且适用于大规模制造，这将为开发高效的光催化剂提供新的策略。