A sea urchin-shaped, single-layer, and hollow NiO–NiS photocatalyst with a large surface area was designed for carbon dioxide (CO₂) conversion in this study. A d-glucose polymeric hollow frame was fabricated using a d-glucose monomer, and NiO particles were stably grown on it using the hydrothermal method to form a hollow NiO surface. The d-glucose frame was removed by heat treatment to create hollowed NiO; hollowed NiO–NiS (h-NiO–NiS) was subsequently obtained through ion exchange between the O ions in NiO and S ions in the sulfur powder. Additionally, we attempted to determine the correlation among the surface area of the h-NiO–NiS catalyst, CO₂ gas adsorption capacity, and catalyst performance. The surface area of the h-NiO–NiS catalyst was ten times larger than that of the nanometer-sized NiO–NiS (n-NiO–NiS, 21.2 m² g⁻¹) catalyst. The CO₂ photocatalytic conversion performance of the hollowed catalyst was approximately seven times larger than that of the nanosized catalyst. As the amount of ion-exchanged S increased, methane selectivity increased, and optimal methane production was obtained when the weight ratio of NiO and sulfur powder was 1 : 4. Using temperature-programmed desorption (TPD) analyses of CO₂ and H₂O, the adsorption of water molecules on the Ni–S surface and that of CO₂ gas on the Ni–O surface during CO₂ conversion reaction were confirmed. The h-NiO–NiS catalyst facilitated an effective charge separation through a well-developed interfacial transition between the linked NiS and NiO, and resulted in increased CO₂ photoreduction performance under sunlight.

在这项研究中，设计了一种海胆形，单层且中空的具有大表面积的NiO-NiS光催化剂，用于二氧化碳（CO ₂）的转化。甲d -葡萄糖聚合物空心框架是使用制造的d葡萄糖单体，和NiO颗粒使用水热法，以形成中空的NiO表面上稳定地生长。所述d通过热处理除去葡萄糖帧创建挖空的NiO; 随后通过NiO中的O离子与硫粉中的S离子之间的离子交换获得了空心的NiO-NiS（h -NiO-NiS）。此外，我们试图确定h -NiO-NiS催化剂，CO ₂的表面积之间的相关性。气体吸附能力和催化剂性能。所述的表面面积ħ -NiO-NiS的催化剂是比上述纳米尺寸的NiO-NiS的第（n-的NiO-NiS的，21.2微米的大十倍² 克^-1）催化剂。中空催化剂的CO ₂光催化转化性能大约是纳米催化剂的七倍。当NiO和硫粉的重量比为1：4时，随着离子交换S量的增加，甲烷的选择性增加，并获得了最佳的甲烷生成量。使用温度程序解吸（TPD）分析CO ₂和H ₂ O ，水分子在Ni–S表面的吸附和CO ₂的吸附确认了CO ₂转化反应过程中Ni-O表面有气体。的ħ -NiO-NiS的催化剂通过联系的NiS和NiO之间发达的界面过渡促进有效的电荷分离，并导致增加的CO ₂在日光下光还原的性能。