Device and method capable of measuring surface pH of photoelectrode in real time

The invention discloses a device and method capable of measuring the pH value of the surface of a photoelectrode in real time, and belongs to the technical field of photoelectrochemistry. According to the device disclosed by the invention, the illumination intensity, time and pH are linked together by utilizing the real-time pH-sensitive fluorescent probe, so that the real-time measurement of the pH value on the surface of the photoelectrode is realized, the visual research on the photoelectrocatalytic activity is further realized, the activity of the photoelectrode and the spatial distribution of active sites are disclosed, and the photocatalytic performance can be better evaluated. The method and the device can be used for measuring the pH distribution of the surface of the electrode in the photoelectrochemical water decomposition process in real time, and can be applied to research in the fields of solar hydrogen production and the like.

Microwave auxiliary thermal treatment method for ceramic fibre and thermal insulation body structure

The invention provides a microwave auxiliary heat treatment method for ceramic fiber, and a heat insulator structure thereof, and relates to a ceramic fiber. The invention provides the microwave auxiliary heat treatment method for ceramic fiber, and the heat insulator structure thereof. The prepared fiber has a single-phase structure, has the length-diameter ratio more than 200, is compact in inside, and can be used for 1-3 type piezoelectric composite materials. The ceramic fiber is obtained by putting gel fiber into a crucible, putting the crucible with the gel fiber into a heat insulator, presintering the whole heat insulator in a microwave oven and then subjecting the presentered fiber to heat treatment in a muffle furnace. The heat insulator structure thereof is provided with an outer-layer heat insulator, a secondary-outer-layer Al2O3 heat insulator and an inner-layer crucible, and a microwave auxiliary absorbing medium is arranged between the secondary-outer-layer Al2O3 heat insulator ...

Method for preparing lead zirconate titanate ceramics fibre

Device and method for measuring hole concentration on surface of photoelectrode

The invention discloses a photoelectrode surface hole concentration measuring device and method. The photoelectrode surface hole concentration measuring device comprises an electrolytic tank, a first light source, a second light source, an optical element, a silicon diode detector, a data acquisition device, an electrochemical workstation and a computer, according to the invention, the photoelectrode in the electrolytic tank is periodically irradiated by two beams of light with different periods and different wavelengths, so that the concentration of photogenerated holes on the surface of the electrode and the quantitative relation between the concentration and photocurrent are detected in situ. The method can be applied to research on an electrode interface reaction kinetics process in a photoelectrochemical system so as to more scientifically guide preparation of the photoelectrode.

Method for preparing lead zirconate titanate ceramics fibre

The invention provides a preparation method of lead zirconate-titante ceramic fiber, which relates to a ceramic fiber. The fiber obtained with the diameter less than 30Mum and the length about 1cm has a single perovskite phase and comparatively high consistency and the invention can be a preparation method of lead zirconate-titante ceramic fiber of ceramic fiber for 1-3 piezoelectric composites. The preparation of lead zirconate-titante precursor solution is : lead acetate trihydrate is added into n-Butyl alcohol, complexing agent glacial acetic acid is added then; the mixture is heated, dissolved and cooled to obtain solution A; zirconium butoxide and titanium butoxide are poured into the n-Butyl alcohol in sequence to obtain the binary mixed solution of zirconium and titanium, and then acetyl acetone is added into the binary mixed solution and solution B is obtained after backflowing; the solution A and the solution B are mixed and the lead zirconate-titante precursor solution is obtained ...

Interdigital type piezoelectric fibre composite material, preparation method and application thereof

The invention relates to an interdigital type piezoelectric fibre composite material, a preparation method and an application thereof, which relates to a functional material and provides the interdigital type piezoelectric fibre composite material which works based on a bending vibration mode and can induce stress waves in different directions, the preparation method and the application thereof. An upper electrode of the piezoelectric fibre composite material of the fork finger type piezoelectric fibre composite material is an interdigital electrode, the interdigital fingerbreadth is 0.05mm, the interdigital finger distance is 0.2mm, polarization directions between the adjacent interdigitals are opposite, and the interdigitals are electrically connected in parallel. The preparation methodcomprises the following steps: carrying out postheating treatment on the piezoelectric fibre and converting into piezoelectric ceramic fibre; taking epoxy resin or silicone and the like as a basal body ...

Microwave auxiliary thermal treatment method for ceramic fibre and thermal insulation body structure

The invention provides a microwave auxiliary heat treatment method for ceramic fiber, and a heat insulator structure thereof, and relates to a ceramic fiber. The invention provides the microwave auxiliary heat treatment method for ceramic fiber, and the heat insulator structure thereof. The prepared fiber has a single-phase structure, has the length-diameter ratio more than 200, is compact in inside, and can be used for 1-3 type piezoelectric composite materials. The ceramic fiber is obtained by putting gel fiber into a crucible, putting the crucible with the gel fiber into a heat insulator, presintering the whole heat insulator in a microwave oven and then subjecting the presentered fiber to heat treatment in a muffle furnace. The heat insulator structure thereof is provided with an outer-layer heat insulator, a secondary-outer-layer Al2O3 heat insulator and an inner-layer crucible, and a microwave auxiliary absorbing medium is arranged between the secondary-outer-layer Al2O3 heat insulator ...