. Front view of the experimental setup for visible-light irradiation of the photocatalysts libraries^[9]

. (a) Schematic diagram of drop-on-demand inkjet delivery system (mainly with micro-piezoelectric inkjet head, solution reservoir, x-y moving stage, microreactor and substrate)^[12]; (b) schematic diagram of Sol-Gel device (1-box with temperature controlling insides; 4-shaking motor; 5-support rod; 7-reaction chamber; 8-microreactor array)^[16]

. (a) Schematic diagram of a typical triple-laser-beam parallel heating system(mainly including laser sources, reflectors, sample library holder and moving platform, computer and controllers)^[21]; (b) Schematic diagram of a representative triple channel optical spectrometer(mainly including fiber optical spectrometer, spectral calibration device, modular LE and LED excitation source, sample library holder and moving platform)^[22]

. View of the multi-autoclave showing the mode of stacking of the Teflon blocks and one of the alternative designs using Teflon inserts which can be stacked vertically^[23]

. (a) Schematic layout of the high-throughput hydrothermal (HiTCH) flow synthesis system, and (b) shematic of freeze-dried powders fired at 1000 ℃ and filled into a PTFE triangular holder^[29]

. Schematic diagram (a) and photograph (b) of the ceramic substrate-copper net-metal mask microreactor array, (c) a plastic substrate with the same predrilled shallow wells (2 mm in depth) as the library, then flipped over the synthesized powders into the shallow wells, and (d) a metal plate used to compact powders^[39]

. Schematic diagram of microfluidic chip for synthesis of three-elements compounds^[42]

. Setup of the microchip-based photocatalyst screening system (a), schematic diagram of the multi-channel array ship with a wedge structure in each channel (b), schematic diagram of the catalyst loading (c), and illustration of the catalyst screening procedure (d)^[43]

. Photos of the microfluidic-based composition and temperature controlling platform with two inlets and 20 outlets (a), details of the micro-reactor arrays (120-230 ℃, 100 holes) and microfluidic chip having Christmas-tree-type structure (b)^[48]

. Ternary combi-chem libraries for (a) (Ca,Sr,Mg)₂Si₅N₈: Eu²⁺, (b) (Ca,Sr,Mg)₂Si₅N₈:Eu²⁺, (c) (Ca,Sr,Ba)₂Si₅N₈:Eu²⁺, and (d) (Sr,Ba,Mg)₂Si₅N₈:Eu²⁺ in terms of photoluminescent intensity and color chromaticity^[49]

. Internal structure(a), schematic diagram (b) and operation flow chart (c) of the high throughput equipment^[53]

. Schematic diagram of high-throughput electric field-assisted combustion synthesis system^[55]