▎ 摘　　要

NOVELTY - A filter device comprises funnel, filter bottle, flow control valve (I), flow control valve (II), micro-pump (I), micro-pump (II), hydrochloric acid container bottle, deionized water container bottle, vacuum pump, level gauge (I), level gauge (II), pH meter and ultra-pure water meter that are respectively connected with computer. The funnel is connected with opening of filter bottle. The upper nozzle outlet of filter bottle is connected with vacuum pump through pipe. The edge portion of funnel is provided with feed port (I) and feed port (II). USE - Filter device for filtering graphene oxide. DETAILED DESCRIPTION - A filter device comprises a funnel, a filter bottle, a flow control valve (I), flow control valve (II), a micro-pump (I), a micro-pump (II), an hydrochloric acid container bottle, a deionized water container bottle, a vacuum pump, a level gauge (I), a level gauge (II), a pH meter and an ultra-pure water meter. The funnel is connected with opening of the filter bottle. The upper nozzle outlet of the filter bottle is connected with the vacuum pump through a pipe. The edge portion of the funnel is provided with feed port (I) and feed port (II). The feed port (I) is connected to the hydrochloric acid container bottle via a pipeline. The feed port (II) is connected to the deionized water container bottle via a pipeline. The deionized water container bottle is connected with the water outlet of the ultra-pure water meter. The flow control valve (I) and micro-pump (I) are sequentially arranged between the feed port (I) and hydrochloric acid container bottle. The flow control valve (II) and micro-pump (II) are sequentially arranged between the feed port (II) and deionized water container bottle. The level gauge (I) is arranged at feed port (I) of the funnel. The level gauge (II) is located within deionized water container bottle. The pH meter is arranged at a feed port (II) of the funnel. The funnel, filter bottle, flow control valve (I), flow control valve (II), micro-pump (I), micro-pump (II), hydrochloric acid container bottle, deionized water container bottle, vacuum pump, hopper, level gauge (I), level gauge (II), pH meter and ultra-pure water meter are respectively connected with a computer.