The emission of various volatile organic compounds (VOCs) caused by indoor decoration and furniture placement are the causes of health hazards in people's lives. Here, we demonstrate a self-powered air purifier for indoor organic pollutant removal based on triboelectric nanogenerator (TENG), coupling non-thermal plasma (NTP) with photocatalytic oxidation (PCO). An adjustable external high voltage field is generated by our homemade TENG, in which the output open-circuit voltage (V_oc) ranges from 10 to 30 kV. After connecting the TENG with a non-thermal plasma generator (NTP-G), a maximum ozone concentration of 14.7 mg/m³ and NTP can be generated. The prepared three-dimensional porous framework is used as a photocatalytic layer, which can support more titanium oxide and increase the contact area between the photocatalyst and formaldehyde. This designed self-powered air purifier can reduce the formaldehyde concentration from 2.06 ppm to 0 ppm in 21 min in a 13 L closed air chamber. The design and concept proposed in this work has multiple ways for formaldehyde degradation and are not limited by sunlight, and can remove indoor formaldehyde around the clock, providing an effective way to create a cleaner and healthier indoor environment.

室内装修和家具摆放所引起的各种挥​​发性有机化合物（VOCs）的排放是危害人们生活健康的原因。在这里，我们展示了一种基于摩擦纳米发电机 (TENG)、非热等离子体 (NTP) 与光催化氧化 (PCO) 耦合的用于室内有机污染物去除的自供电空气净化器。我们自制的TENG产生一个可调的外部高压场，其中输出开路电压（V _oc) 范围从 10 到 30 kV。将 TENG 与非热等离子体发生器 (NTP-G) 连接后，可产生 14.7 mg/m³ 的最大臭氧浓度和 NTP。制备的三维多孔骨架用作光催化层，可以承载更多的二氧化钛，增加光催化剂与甲醛的接触面积。这款设计的自供电空气净化器可在 13 L 密闭气室中，在 21 分钟内将甲醛浓度从 2.06 ppm 降至 0 ppm。本作品提出的设计理念具有多种甲醛降解方式，不受阳光限制，可全天候去除室内甲醛，为营造更清洁、更健康的室内环境提供了有效途径。