A nanoscale heterogeneous environmental catalyst, FePC alloy, was successfully fabricated by a single-roller melt spinning technique. The prepared catalyst had a biphasic disorder structure with -Fe nanocrystallites embedded in the amorphous matrix. The pulsed laser process effectively improved the nanoscale heterogeneity degree, thermodynamic properties, surface photothermal conversion, corrosion resistance and hydrophilicity of the catalyst. The 60 W pulsed laser processing induced the nanocrystalline FeP precipation in the catalyst, which is transformed from -Fe and amorphous matrix, promoting the electron donation rate of the galvanic cell system; therefore, the 60 W pulsed laser processed catalyst exhibited an excellent catalytic performance, such as a high value, strong TOC removal rate and low activation energy. In addition, compared with other oxide, metallic crystal and metallic glass catalysts, this catalyst exhibited a much higher surface area-normalized rate constant . The reusability test showed that this catalyst exhibited a reliable stability, and its decolorization efficiency at the 20th cycle still remained above 95 %; moreover, the parameter analysis showed that it had a strong adaptability in the persulfate system. This study provides a new strategy for designing and fabricating the efficient, low-cost and environmental catalysts for dye wastewater degradation.

中文翻译：

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脉冲激光诱导 FePC 合金纳米级相变，增强染料废水降解催化活性

采用单辊熔融纺丝技术成功制备了纳米级多相环境催化剂FePC合金。所制备的催化剂具有双相无序结构，其中-Fe纳米晶嵌入非晶基质中。脉冲激光工艺有效提高了催化剂的纳米级非均质程度、热力学性能、表面光热转化、耐腐蚀性和亲水性。 60 W脉冲激光加工诱导催化剂中出现纳米晶FeP沉淀，其由-Fe和非晶基体转变而来，提高了原电池系统的电子供给率；因此，60 W脉冲激光处理的催化剂表现出优异的催化性能，如高值、强TOC去除率和低活化能。此外，与其他氧化物、金属晶体和金属玻璃催化剂相比，该催化剂表现出更高的表面积归一化速率常数。重复使用性测试表明，该催化剂表现出可靠的稳定性，第20次循环脱色效率仍保持在95%以上；而且参数分析表明其在过硫酸盐体系中具有很强的适应性。该研究为设计和制造高效、低成本、环保的染料废水降解催化剂提供了新的策略。