Simultaneous Photocatalytic Sugar Conversion and Hydrogen Production Using Pd Nanoparticles Decorated on Iron-Doped Hydroxyapatite
Simultaneous Photocatalytic Sugar Conversion and Hydrogen Production Using Pd Nanoparticles Decorated on Iron-Doped Hydroxyapatite
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DOI：
10.3390/catal13040675
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发表时间：
2023-03
期刊：
影响因子：
3.9
通讯作者：
Chitiphon Chuaicham;Yuto Noguchi;Sulakshana Shenoy;Kaiqian Shu;Jirawat Trakulmututa;Assadawoot Srikhaow
中科院分区：
文献类型：
--
作者：
Chitiphon Chuaicham;Yuto Noguchi;Sulakshana Shenoy;Kaiqian Shu;Jirawat Trakulmututa;Assadawoot Srikhaow
Pd 纳米颗粒 (PdNPs) 成功沉积在 Fe(III) 修饰的羟基磷灰石 (HAp) 表面，随后将其用作光催化剂，同时光催化析氢和木糖转化。使用 XRD、SEM 和 TEM 仪器检查了原始 HAp、FeHAp 和 Pd@FeHAp 的结构相和形态。在20°C时，Pd@FeHAp提供了比原始HAp和FeHAp更高的木糖转化率，分别约为2.15倍和1.41倍。此外，使用 Pd@FeHAp 还增加了乳酸和甲酸的产量。使用 Pd@FeHAp 进一步研究了最佳条件，结果表明在 30 °C 下 60 分钟内木糖转化率约为 70%。此外，只有Pd@FeHAp在光照射下产生H2。为了阐明 FeHAp 中 Fe(III) 掺杂以及复合材料中 PdNPs 和 FeHAp 之间异质结相对于纯 Hap 的影响，分析了 Pd@FeHAp 样品的光学和物理化学性质，结果揭示了该材料分离和传输光生电子空穴对的非凡能力，与 Hp 和 FeHAp 相比，光致发光强度大幅降低就证明了这一点。此外，使用反向双束光声光谱法发现 Pd@FeHAp 复合材料中电子陷阱密度的降低归因于较高的光催化活性率。此外，通过在 FeHAp 的 HAp 结构中添加 Fe(III) 来开发新的电子能级，可以通过减小能带隙来提高吸收光的能力。通过降低电荷复合和缩小能带隙，提高了 Pd@FeHAp 复合材料的光催化性能。因此，新开发的 Pd@FeHAp 复合材料可以用作光催化剂来产生替代氢气能源和高价值化学品。
Pd nanoparticles (PdNPs) were successfully deposited on the surface of Fe(III)-modified hydroxyapatite (HAp), which was subsequently used as a photocatalyst for simultaneous photocatalytic H2 evolution and xylose conversion. The structural phase and morphology of the pristine HAp, FeHAp, and Pd@FeHAp were examined using XRD, SEM, and TEM instruments. At 20 °C, Pd@FeHAp provided a greater xylose conversion than pristine HAp and FeHAp, about 2.15 times and 1.41 times, respectively. In addition, lactic acid and formic acid production was increased by using Pd@FeHAp. The optimal condition was further investigated using Pd@FeHAp, which demonstrated around 70% xylose conversion within 60 min at 30 °C. Moreover, only Pd@FeHAp produced H2 under light irradiation. To clarify the impact of Fe(III) doping in FeHAp and heterojunction between PdNPs and FeHAp in the composite relative to pure Hap, the optical and physicochemical properties of Pd@FeHAp samples were analyzed, which revealed the extraordinary ability of the material to separate and transport photogenerated electron-hole pairs, as demonstrated by a substantial reduction in photoluminescence intensity when compared to Hp and FeHAp. In addition, a decrease in electron trap density in the Pd@FeHAp composite using reversed double-beam photoacoustic spectroscopy was attributed to the higher photocatalytic activity rate. Furthermore, the development of new electronic levels by the addition of Fe(III) to the structure of HAp in FeHAp may improve the ability to absorb light by lessening the energy band gap. The photocatalytic performance of the Pd@FeHAp composite was improved by lowering charge recombination and narrowing the energy band gap. As a result, a newly developed Pd@FeHAp composite might be employed as a photocatalyst to generate both alternative H2 energy and high-value chemicals.