【物理化学学报】doi: 10.3866/PKU.WHXB202304024
传统的油墨打印具有方便快捷的优势,但打印过程中墨水或碳粉的大量使用对人体和环境造成了不可忽视的危害。基于激光的高能粒子特性和光热辐射热效应,利用激光欠焦和聚焦两种工作模式,可实现激光无墨打印和微区加工。本文报道了一种基于羟基磷灰石的“有机-无机-有机”三明治结构多功能纸,并利用激光的光热辐射效应使功能纸表层有机材料——纤维素纤维表面温度升高,实现表层均匀碳化,夹层无机材料——羟基磷灰石阻挡能量继续传导防止纸张烧穿,以此来达到无墨打印的效果。基于激光烧蚀的无墨打印,能够显著降低打印成本,有利于激光烧蚀打印技术的推广。此外,采用激光烧蚀打印技术作用于功能纸上的打印效果具有稳定、绿色环保等特点,在档案存储用纸、食品包装用纸和后天致盲患者阅读等方面具有广泛的应用。
【物理化学学报】doi: 10.3866/PKU.WHXB202310004
自供电光电探测器可在无外部供能时将入射光信号转换为电信号,实现光探测功能。结合低维材料可将自供电光电探测器尺寸缩小至微纳量级,从而进一步实现器件的微型化和集成化。本文介绍了基于自供电技术的低维材料光电探测器的架构及工作原理,总结了当前自供电光电探测器应用进展,讨论了自供电光电探测器未来的发展方向与存在的问题,希望能为新型自供电光电探测器的材料选择和开发提供参考。
【大学化学】doi: 10.12461/PKU.DXHX202502018
新修订出台的《科学技术普及法》为高校深入推进科学普及工作构筑起全新的法律根基。本文立足高校独有的丰富科普资源储备,综合考量科普融入教学、科研等多样化的教育教学手段,开展了面向青少年的科技创新引领、面向师生和社会的前沿传递、面向少儿的趣味化学启蒙等系列特色科普活动,彰显了高校在化学科普中的潜力与引领作用。
【无机化学学报】doi: 10.11862/CJIC.20260055
Aiming at the problem of water pollution, a broad-spectrum response composite material CQDs/PW12/CdS modified by carbon quantum dots (CQDs) was prepared via a microwave-assisted hydrothermal method using glucose as the carbon source, cadmium sulfide (CdS) and phosphotungstic acid (PW12) as precursors. The photocatalytic mechanism of CQDs/PW12/CdS is more inclined towards the Z-scheme heterojunction. The optimized CQDs/PW12/CdS heterojunction composites achieved 93.01% photodegradation efficiency of rhodamine B (RhB) at 120 min of simulated sunlight irradiation, and they also exhibited a favorable degrading effect on common dyes and antibiotics in water. Using lactic acid as the sacrificial reagent, the photocatalytic hydrogen production activity of the developed photocatalyst was evaluated under simulated sunlight irradiation. According to the experimental results, after 8 h of irradiation, the CQDs/PW12/CdS composite material showed the highest H2 production rate (12.34 mmol·g-1), which was six times that of the monomer CdS (2.05 mmol·g-1). The enhancement of photocatalytic activity is attributed to the effective separation of photogenerated charges caused by the anisotropic junctions in the CQDs/PW12/CdS system.
