High-purity AlF3 was prepared by the combined process of leaching the raw material of waste aluminum electrolytes with aluminum chloride,electrolyzing the leaching solution,and then mixing with ammonium hydrogen fluor...High-purity AlF3 was prepared by the combined process of leaching the raw material of waste aluminum electrolytes with aluminum chloride,electrolyzing the leaching solution,and then mixing with ammonium hydrogen fluoride for roasting.Under the optimal leaching conditions of a fluorine to aluminum molar ratio of 2.0,a liquid-to-solid ratio of 12,a temperature of 90℃,and time of 4 h,the fluorine leaching rate can reach 99.15%.Under the action of electrolysis,the H+is reduced to H2 in the cathode,while the remaining OH−combines with AlF^(2+)and AlF^(2+)to precipitate aluminium hydroxyfluoride hydrate.The results show that electrolysis is beneficial to reduce the impurity content of aluminium hydroxyfluoride hydrate.When the current density is 0.2 A/cm^(2),the temperature is 90℃,the stirring speed is 200 r/min,and the electrolysis endpoint pH is 3.0,the total content of Na,K and Ca impurities in the precipitation is only 0.64 wt.%.Moreover,the hydrolysis can be inhibited effectively by adding ammonium hydrogen fluoride in the mixed-roasting process.When the mass ratio of aluminium hydroxyfluoride hydrate to ammonium hydrogen fluoride is 2꞉1,the purity of the AlF3 product is even 99.51 wt.%.Conducively,the high-purity AlF_(3)can be returned to the aluminum electrolysis industry or used as a reagent.展开更多
Near-infrared Ⅱ(NIR-Ⅱ)fluorescent nanoparticles(NPs)based on aggregation-induced emission(AIE)have attracted significant attention due to theirmultimodal imaging capabilities aswell as the combined photothermal and ...Near-infrared Ⅱ(NIR-Ⅱ)fluorescent nanoparticles(NPs)based on aggregation-induced emission(AIE)have attracted significant attention due to theirmultimodal imaging capabilities aswell as the combined photothermal and photodynamic therapeutic effects in cancer therapy.Reported herein is the rational designed AIE molecule(BPT),via incorporating phenothiazine units with strong electron-donating and reactive oxygen species(ROS)generation capabilities into the classical AIE scaffold tetraphenylethylene,further coupled with a strong electron-acceptor named benzo[1,2-c:4,5-c’]bis[1,2,5]thiadiazole.The BPT NPs exhibited maximum NIR-Ⅱ fluorescence emission at 1083 nm,a fluorescence quantum yield of 1.53%,photothermal conversion efficiency of 63%,and photoacoustic imaging capabilities,alongside considerable type I ROS generation ability.Additionally,when a kind of nitric oxide(NO)donor named O_(2)-(2,4-dinitrophenyl)1-[(4-ethoxycarbonyl)piperazin-1-yl]diazen-1-ium-1,2-diolate(JSK)was incorporated,the corresponding JSK-BPT NPs could generate O_(2)^(−),NO,and peroxynitrite to induce phototoxicity.By applying it to the 4T1 breast tumor model,JSK-BPT NPs achieved high-quality multimodal imaging of the vasculature and tumor regions in mice.Under the multimodal imaging guidance,the 4T1 tumor could be ablated completely after a single dose of JSK-BPT NPs and under the irradiation of an 808 nm laser.展开更多
文摘High-purity AlF3 was prepared by the combined process of leaching the raw material of waste aluminum electrolytes with aluminum chloride,electrolyzing the leaching solution,and then mixing with ammonium hydrogen fluoride for roasting.Under the optimal leaching conditions of a fluorine to aluminum molar ratio of 2.0,a liquid-to-solid ratio of 12,a temperature of 90℃,and time of 4 h,the fluorine leaching rate can reach 99.15%.Under the action of electrolysis,the H+is reduced to H2 in the cathode,while the remaining OH−combines with AlF^(2+)and AlF^(2+)to precipitate aluminium hydroxyfluoride hydrate.The results show that electrolysis is beneficial to reduce the impurity content of aluminium hydroxyfluoride hydrate.When the current density is 0.2 A/cm^(2),the temperature is 90℃,the stirring speed is 200 r/min,and the electrolysis endpoint pH is 3.0,the total content of Na,K and Ca impurities in the precipitation is only 0.64 wt.%.Moreover,the hydrolysis can be inhibited effectively by adding ammonium hydrogen fluoride in the mixed-roasting process.When the mass ratio of aluminium hydroxyfluoride hydrate to ammonium hydrogen fluoride is 2꞉1,the purity of the AlF3 product is even 99.51 wt.%.Conducively,the high-purity AlF_(3)can be returned to the aluminum electrolysis industry or used as a reagent.
基金support from Shenzhen Medical Research Fund(B2402042)National Natural Science Foundation of China(22274069 and 22304070)+1 种基金Shenzhen Science and Technology Program project(JCYJ20240813094504007 and JCYJ20210324104007020)Guangdong Provincial Key Laboratory of Advanced Biomaterials(2022B1212010003).
文摘Near-infrared Ⅱ(NIR-Ⅱ)fluorescent nanoparticles(NPs)based on aggregation-induced emission(AIE)have attracted significant attention due to theirmultimodal imaging capabilities aswell as the combined photothermal and photodynamic therapeutic effects in cancer therapy.Reported herein is the rational designed AIE molecule(BPT),via incorporating phenothiazine units with strong electron-donating and reactive oxygen species(ROS)generation capabilities into the classical AIE scaffold tetraphenylethylene,further coupled with a strong electron-acceptor named benzo[1,2-c:4,5-c’]bis[1,2,5]thiadiazole.The BPT NPs exhibited maximum NIR-Ⅱ fluorescence emission at 1083 nm,a fluorescence quantum yield of 1.53%,photothermal conversion efficiency of 63%,and photoacoustic imaging capabilities,alongside considerable type I ROS generation ability.Additionally,when a kind of nitric oxide(NO)donor named O_(2)-(2,4-dinitrophenyl)1-[(4-ethoxycarbonyl)piperazin-1-yl]diazen-1-ium-1,2-diolate(JSK)was incorporated,the corresponding JSK-BPT NPs could generate O_(2)^(−),NO,and peroxynitrite to induce phototoxicity.By applying it to the 4T1 breast tumor model,JSK-BPT NPs achieved high-quality multimodal imaging of the vasculature and tumor regions in mice.Under the multimodal imaging guidance,the 4T1 tumor could be ablated completely after a single dose of JSK-BPT NPs and under the irradiation of an 808 nm laser.
