Safe and precise control of gas flow is one of the key factors to many physical and chemical processes, such as degassing, natural gas transportation, and gas sensor. In practical application, it is essential for the gas-involved physicochemical process to keep everything under control and safe, which significantly relies on the controllability, safety, and stability of their valves. Here we show a light-responsive and corrosion-resistant gas valve with non-thermal effective liquid-gating positional flow control under a constant pressure by incorporating dynamic gating liquid with light responsiveness of solid porous substrate. Our experimental and theoretical analysis reveal that the photoisomerization of azobenzene-based molecular photoswitches on the porous substrate enabled the gas valve to possess a light-responsive and reversible variation of substantial critical pressure of non-thermal effective gas flow switch. Moreover, the chemically inert gating liquid prevented the solid substrate from corrosion and, by combining with the high spatiotemporal resolution of light, the gas valve realizes a precisely positional open and close under a steady-state pressure. The application demonstrations in our results show the potentials of the new gas valve for bringing opportunities to many applications, such as gas-involved reaction control in microfluidics, soft actuators, and beyond.

气体流量的安全和精确控制是许多物理和化学过程的关键因素之一，例如脱气、天然气输送和气体传感器。在实际应用中，涉及气体的理化过程必须做到一切尽在掌控和安全，这在很大程度上取决于其阀门的可控性、安全性和稳定性。在这里，我们展示了一种光响应和耐腐蚀的气阀，通过将动态浇注液体与固体多孔基板的光响应性结合起来，在恒压下具有非热有效液体浇注位置流量控制。我们的实验和理论分析表明，基于偶氮苯的分子光开关在多孔基板上的光异构化使气阀能够对非热有效气体流量开关的实质性临界压力具有光响应和可逆变化。此外，化学惰性的门控液体可防止固体基体腐蚀，结合光的高时空分辨率，气阀在稳态压力下实现精确的位置打开和关闭。我们结果中的应用演示展示了新型气阀为许多应用带来机会的潜力，例如微流体、软执行器等中涉及气体的反应控制。化学惰性的门控液可防止固体基体腐蚀，结合光的高时空分辨率，气阀在稳态压力下实现精确定位打开和关闭。我们结果中的应用演示展示了新型气阀为许多应用带来机会的潜力，例如微流体、软执行器等中涉及气体的反应控制。化学惰性的门控液可防止固体基体腐蚀，结合光的高时空分辨率，气阀在稳态压力下实现精确定位打开和关闭。我们结果中的应用演示展示了新型气阀为许多应用带来机会的潜力，例如微流体、软执行器等中涉及气体的反应控制。