The removal of harmful cyanobacterial blooms(HCBs)and reuse of the resulting algal sludge are pressing issues in current environmental governance and ecological conservation.Aiming at tackling the abovementioned chall...The removal of harmful cyanobacterial blooms(HCBs)and reuse of the resulting algal sludge are pressing issues in current environmental governance and ecological conservation.Aiming at tackling the abovementioned challenges,titanium(Ti)-based coagulants are promising candidates.However,most of them suffer from poor stability and weak actual algal removal ability,and recycling of the algal sludge usually produces titanium dioxide(TiO_(2))with low photocatalytic ability.In this work,a lanthanum(La)-modified polytitanium chloride(La-PTC)coagulant is reported.La in the La-PTC coagulant serves a"kill two birds with one stone"strategy in algae removal and algae sludge reuse.Owing to the introduction of La ions,the La-PTC coagulant exhibits ultra-high stability and excellent algae removal capability with an efficiency of 98.71%,which is 7.25%higher than that of PTC coagulant.Moreover,recycling algae sludge can prepare high catalytic(2.45 times the commercial P25 TiO_(2))La/C-TiO_(2),where the presence of La enhances its visible light response range and inhibits electron hole recombination.The strategy of this La modified coagulant can not only achieve efficient re moval of HCBs,but also transfo rm the recovered algal sludge into photocatalysts with higher catalytic capacity.展开更多
Chemical vapor deposition has emerged as the most promising technique for the growth of graphene.However, most reports of this technique use either flammable or explosive gases, which bring safety concerns and extra c...Chemical vapor deposition has emerged as the most promising technique for the growth of graphene.However, most reports of this technique use either flammable or explosive gases, which bring safety concerns and extra costs to manage risk factors. In this article, we demonstrate that continuous monolayer graphene can be synthesized via chemical vapor deposition technique on Cu foils using industrially safe gas mixtures. Important factors, including the appropriate ratio of hydrogen flow and carbon precursor,pressure, and growth time are considered to obtain graphene films. Optical measurements and electrical transport measurements indicate graphene films are with comparable quality to other reports. Such continuous large area graphene can be synthesized under non-flammable and non-explosive conditions, which opens a safe and economical method for mass production of graphene. It is thereby beneficial for integration of graphene into semiconductor electronics.展开更多
Phosphorescent iridium complexes ranged from far-red to NIR have attracted great attention as oxygen probes or photosensitizers recently.In this work,a far-red phosphorescent iridium complex((DPQ)2Ir(acac))was adopted...Phosphorescent iridium complexes ranged from far-red to NIR have attracted great attention as oxygen probes or photosensitizers recently.In this work,a far-red phosphorescent iridium complex((DPQ)2Ir(acac))was adopted to prepare biocompatible nanoparticles(Ir-NPs)for both phosphorescence imaging and photodynamic therapy of living cells.The iridium complex was highly sensitive to oxygen in organic solvent,but became less insensitive after being incorporated into NPs,though the particle matrix was highly permeable to oxygen.Moreover,the Ir-NPs exhibited a fast rate of singlet oxygen generation under 660 nm light irradiation.Taking advantage of these Ir-NPs,cellular imaging in the far-red range was realized;meanwhile,in vitro PDT was successfully performed.These results suggested that the Ir-NPs can function as both bio-imaging agents and nano-photosensitizers that work in the far red range.展开更多
基金Project supported by the National Natural Science Foundation of China(62175266,61775245)。
文摘The removal of harmful cyanobacterial blooms(HCBs)and reuse of the resulting algal sludge are pressing issues in current environmental governance and ecological conservation.Aiming at tackling the abovementioned challenges,titanium(Ti)-based coagulants are promising candidates.However,most of them suffer from poor stability and weak actual algal removal ability,and recycling of the algal sludge usually produces titanium dioxide(TiO_(2))with low photocatalytic ability.In this work,a lanthanum(La)-modified polytitanium chloride(La-PTC)coagulant is reported.La in the La-PTC coagulant serves a"kill two birds with one stone"strategy in algae removal and algae sludge reuse.Owing to the introduction of La ions,the La-PTC coagulant exhibits ultra-high stability and excellent algae removal capability with an efficiency of 98.71%,which is 7.25%higher than that of PTC coagulant.Moreover,recycling algae sludge can prepare high catalytic(2.45 times the commercial P25 TiO_(2))La/C-TiO_(2),where the presence of La enhances its visible light response range and inhibits electron hole recombination.The strategy of this La modified coagulant can not only achieve efficient re moval of HCBs,but also transfo rm the recovered algal sludge into photocatalysts with higher catalytic capacity.
文摘Chemical vapor deposition has emerged as the most promising technique for the growth of graphene.However, most reports of this technique use either flammable or explosive gases, which bring safety concerns and extra costs to manage risk factors. In this article, we demonstrate that continuous monolayer graphene can be synthesized via chemical vapor deposition technique on Cu foils using industrially safe gas mixtures. Important factors, including the appropriate ratio of hydrogen flow and carbon precursor,pressure, and growth time are considered to obtain graphene films. Optical measurements and electrical transport measurements indicate graphene films are with comparable quality to other reports. Such continuous large area graphene can be synthesized under non-flammable and non-explosive conditions, which opens a safe and economical method for mass production of graphene. It is thereby beneficial for integration of graphene into semiconductor electronics.
基金supported by the NSFC(Grants 61575017 and 11274038)the NCET(12-0771).
文摘Phosphorescent iridium complexes ranged from far-red to NIR have attracted great attention as oxygen probes or photosensitizers recently.In this work,a far-red phosphorescent iridium complex((DPQ)2Ir(acac))was adopted to prepare biocompatible nanoparticles(Ir-NPs)for both phosphorescence imaging and photodynamic therapy of living cells.The iridium complex was highly sensitive to oxygen in organic solvent,but became less insensitive after being incorporated into NPs,though the particle matrix was highly permeable to oxygen.Moreover,the Ir-NPs exhibited a fast rate of singlet oxygen generation under 660 nm light irradiation.Taking advantage of these Ir-NPs,cellular imaging in the far-red range was realized;meanwhile,in vitro PDT was successfully performed.These results suggested that the Ir-NPs can function as both bio-imaging agents and nano-photosensitizers that work in the far red range.
