The synthesis of one-dimensional (1D) semiconductor nanostructures has been studied intensively for a wide range of materials due to their unique structural and physical properties and promising potential for future...The synthesis of one-dimensional (1D) semiconductor nanostructures has been studied intensively for a wide range of materials due to their unique structural and physical properties and promising potential for future technological applications. Among various strategies for synthesizing 1D semiconductor nanostructures, solution-phase synthetic routes are advantageous in terms of cost, throughput, modulation of composition, and the potential for large-scale and environmentally benign production. This article gives a concise review on the recent developments in the solution-phase synthesis of ID semiconductor nanostructures of different compositions, sizes, shapes, and architectures. We first introduce several typical solution-phase synthetic routes based on controlled precipitation from homogeneous solutions, including hydrothermal/solvothermal process, solution-liquid-solid (SLS) process, high-temperature organic-solution process, and low-temperature aqueous-solution process. Subsequently, we discuss two solution-phase synthetic strategies involving solid tem- plates or substrates, such as the chemical transformation of 1D sacrificial templates and the oriented growth of 1D nanostructure arrays on solid substrates. Finally, prospects of the solution-phase approaches to 1D semiconductor nanostructures will be briefly discussed.展开更多
Solution-phase hydrogen reduction(Sp HR)was introduced into V_(2)O_(3)preparation to overcome disadvantages of traditional reduction roasting,which include a long process,high energy consumption,and generation of poll...Solution-phase hydrogen reduction(Sp HR)was introduced into V_(2)O_(3)preparation to overcome disadvantages of traditional reduction roasting,which include a long process,high energy consumption,and generation of pollution.The research mainly focuses onφ-pH diagrams and kinetics of SpHR.Thermodynamic analysis ofφ-pH diagrams for the V-H_(2)O system demonstrates that V_(2)O_(3)preparation via Sp HR requires a high temperature,a high vanadium concentration,and sufficient hydrogen in acidic solution.Kinetic analyses show that the activation energy of V_(2)O_(3)preparation via SpHR is 38.0679 k J/mol,indicating that the reduction is controlled by a combination of interfacial chemical reaction and internal diffusion.Effects of H;partial pressure(slope K=0.05246)on the reaction rate is not as significant as the vanadium concentration(K=1.58872).V_(2)O_(3)crystals with a purity of 99.59%and a vanadium precipitation rate of 99.83%were obtained under the following conditions:pH=5-6,c(V_(2)O_(3))=0.5 mol/L,p(H;)=4 MPa,m(PdCl;)=10 mg,T=250℃,and t=2.5 h.展开更多
The synthesis of high quality all-inorganic perovskite nanowires needs the harsh conditions,complex process and precision instruments,which are not beneficial to their extensive application.Here,all-inorganic perovski...The synthesis of high quality all-inorganic perovskite nanowires needs the harsh conditions,complex process and precision instruments,which are not beneficial to their extensive application.Here,all-inorganic perovskite ce- sium lead bromine (CsPbBr3)nanowires (NWs)are demonstrated with the combination of solution-phase process and halide exchange technology.A metal-semiconductor-metal structure CsPbBr3 nanowire photodetector was prepared, which showed a detectivity as high as 1.7×10^11 cm Hz^1/2W^-1 (Jones)with rapid response time (The rise and decay time are 10ms and 22 ms,respectively).Moreover,our photodetectors have high stability under ultraviolet (UV)light,high temperature and humidity.展开更多
This paper reviews the solution-phase synthesis of nanoparticles via some routes at low temperatures, such as room temperature route, wave-assisted synthesis (γ-irradiation route and sonochemical route), directly hea...This paper reviews the solution-phase synthesis of nanoparticles via some routes at low temperatures, such as room temperature route, wave-assisted synthesis (γ-irradiation route and sonochemical route), directly heating at low temperatures, and hydrothermal/solvothermal methods. A number of strategies were developed to control the shape, the size, as well as the dispersion of nanostructures. Using diethylamine or n-butylamine as solvent, semiconductor nanorods were yielded. By the hydrothermal treatment of amorphous colloids, Bi2S3 nanorods and Se nanowires were obtained. CdS nanowires were prepared in the presence of polyacrylamide. ZnS nanowires were obtained using liquid crystal. The polymer poly (vinyl acetate) tubule acted as both nanoreactor and template for the CdSe nanowire growth. Assisted by the surfactant of sodium dodecyl benzenesulfonate (SDBS), nickel nanobelts were synthesized. In addition, Ag nanowires, Te nanotubes and ZnO nanorod arrays could be prepared without adding any additives or templates.展开更多
The solution-phase synthesis of a muramyl dipeptide(MDP) analogue of N~α-[4-chlorocinnamoyl-L-alanyl-D-isoglutaminyl]-L-lysine (MDA,2) is reported that possesses the features of easy feasibility,safety and low co...The solution-phase synthesis of a muramyl dipeptide(MDP) analogue of N~α-[4-chlorocinnamoyl-L-alanyl-D-isoglutaminyl]-L-lysine (MDA,2) is reported that possesses the features of easy feasibility,safety and low cost in large scale of synthesis.展开更多
Phakellistatin 13 is a good antitumor lead compound isolated from halobios. It was synthesized first time by solution method in combination of stepwise coupling and segment condensation. Final deprotection and cycliza...Phakellistatin 13 is a good antitumor lead compound isolated from halobios. It was synthesized first time by solution method in combination of stepwise coupling and segment condensation. Final deprotection and cyclization were achieved according to our designed method, which was different from the reported process. The spectral data of synthetic product is consisted with literatureal data of natural product. Total synthesis of phakellistatin 13 is a significant achievement to further study of its derivatives and developing novel antitumor drugs.展开更多
To find novel lead compound, seventy-four compound libraries were built through two rounds by a solution-phase CC on the basis of our developed method for the synthesis of dithiocarbamic acid ester. After evaluation f...To find novel lead compound, seventy-four compound libraries were built through two rounds by a solution-phase CC on the basis of our developed method for the synthesis of dithiocarbamic acid ester. After evaluation for the antitumor activities of libraries, six compounds were selected to be synthesized and examined their antitumor activities. It was found that compound 13 (HGWJ-11 C) with novel structure exhibited significant antitumor activities and the scaffold of dithiocarbamic acid was very crucial for the antitumor activity. The compound 13 is worth studying deeply as a potent hit compound.展开更多
Due to easy re-stacking,low yield of few-layered MXenes(f-MXenes),the applications of MXenes are mainly restricted in multi-layered MXenes(m-MXenes)state.Although f-MXenes can be prepared from m-MXenes,after exfoliati...Due to easy re-stacking,low yield of few-layered MXenes(f-MXenes),the applications of MXenes are mainly restricted in multi-layered MXenes(m-MXenes)state.Although f-MXenes can be prepared from m-MXenes,after exfoliation process,a mass of sediments which are still essentially compact MXenes are usually directly discarded,leading to low utilization of raw m-MXenes.Herein,a classified preparation strategy is adopted to exploit the raw m-MXenes and traditional MXenes sediments,taking multi-layered Ti_(3)C_(2)T_(x)MXene as an example.Via rational delamination and subsequent treatment to Ti_(3)C_(2)T_(x)sediments,we succeed in achieving classified and large-scale preparation of various Ti_(3)C_(2)T_(x)MXene derivatives,including few-layered Ti_(3)C_(2)T_(x)(f-Ti_(3)C_(2)T_(x))powders,f-Ti_(3)C_(2)T_(x)films,and Ti_(3)C_(2)T_(x)MXene-derived nanowires with heterostructure of potassium titanate and Ti_(3)C_(2)T_(x).We demonstrate the necessity of“step-by-step delamination”towards traditional Ti_(3)C_(2)T_(x)sediments to improve the yield of f-Ti_(3)C_(2)T_(x)from 15%to 72%;the feasibility of“solution-phase flocculation(SPF)”to fundamentally solve the re-stacking phenomenon,and oxidation degradation issues of f-Ti_(3)C_(2)T_(x)during storage;as well as the convenience of SPF to deal with time-consuming issues of fabricating Ti_(3)C_(2)T_(x)films.What’s more,alkali-heat treatment of final Ti_(3)C_(2)T_(x)sediments turns waste into treasure of Ti_(3)C_(2)T_(x)-derived nanowires,leading to 100%utilization of raw Ti_(3)C_(2)T_(x).The content of one-dimensional(1D)nanowires in the hybrids can be adjusted by controlling alkalization time.The 3D architecture heterostructure composed of 1D nanowires and 2D nanosheets exhibits gorgeous application potential.This work can expand preparation and application of various MXenes derivatives,promoting process of various MXenes.展开更多
In this artide, highly [010]-oriented self-assembled LiCoPO4/C nanoflakes were prepared through simple and facile solution-phase strategies at low temperature and ambient pressure. The formation of 5-hydroxylmethylfur...In this artide, highly [010]-oriented self-assembled LiCoPO4/C nanoflakes were prepared through simple and facile solution-phase strategies at low temperature and ambient pressure. The formation of 5-hydroxylmethylfurfural and levoglucosan via the dehydration of glucose during the reaction played a key role in mediating the morphology and structure of the resulting products. LiCoPO4 highly oriented along the (010)-facets exposed Li^+ ion transport channels, facilitating ultrafast lithium ion transportation. In turn, the unique assembled mesoporous structure and the flake-like morphology of the prepared products benefit lithium ion batteries constructed using two-dimensional (2D) LiCoPO4/C nanoflakes self- assembles as cathodes and commercial Li4Ti5O12 as anodes. The tested batteries provide high capacities of 154.6 mA·h·g^-1 at 0.1 C (based on the LiCoPO4 weight of 1 C = 167 mA·h·g^-1) and stable cycling with 93.1% capacity retention after 100 cycles, which is outstanding compared to other recently developed LiCoPO4 cathodes.展开更多
A method using N,O-bis(trimethylsilyl)acetamide/N-hydroxysuccinimide ester(BSA/NHS) as coupling agents for dipeptide synthesis is descried. The coupling reaction between N-hydroxysuccinimide(NHS)esters and amine...A method using N,O-bis(trimethylsilyl)acetamide/N-hydroxysuccinimide ester(BSA/NHS) as coupling agents for dipeptide synthesis is descried. The coupling reaction between N-hydroxysuccinimide(NHS)esters and amines could be performed under mild conditions with N,O-bis(trimethylsilyl)acetamide(BSA) as coupling reagent and no additional acid/base is required. All byproducts and excessive reactants are water soluble or hydrolysable and easy to eliminate through water-washing at the purification stage.Moreover, all the reactants are inexpensive and widely used in conventional drug production.展开更多
Main observation and conclusion We describe a practical and general protocol for immobilization of heterogeneous catalysts to mechanically robust porous ultra-high molecular weight polyethylene tablets using inter-fac...Main observation and conclusion We describe a practical and general protocol for immobilization of heterogeneous catalysts to mechanically robust porous ultra-high molecular weight polyethylene tablets using inter-facial Lifshitz-van der Waals Interactions.Diverse types of powderous catalysts,including Cu,Pd/C,Pd/Al2O3,Pt/C,and Rh/C have been immobilized successfully.The immobilized catalysts are mechanistically robust towards stirring in solutions,and they worked well in diverse synthetic reactions.The immobilized catalyst tablets are easy to handle and reused.Moreover,the metal leaching of immobilized catalysts was reduced significantly.展开更多
文摘The synthesis of one-dimensional (1D) semiconductor nanostructures has been studied intensively for a wide range of materials due to their unique structural and physical properties and promising potential for future technological applications. Among various strategies for synthesizing 1D semiconductor nanostructures, solution-phase synthetic routes are advantageous in terms of cost, throughput, modulation of composition, and the potential for large-scale and environmentally benign production. This article gives a concise review on the recent developments in the solution-phase synthesis of ID semiconductor nanostructures of different compositions, sizes, shapes, and architectures. We first introduce several typical solution-phase synthetic routes based on controlled precipitation from homogeneous solutions, including hydrothermal/solvothermal process, solution-liquid-solid (SLS) process, high-temperature organic-solution process, and low-temperature aqueous-solution process. Subsequently, we discuss two solution-phase synthetic strategies involving solid tem- plates or substrates, such as the chemical transformation of 1D sacrificial templates and the oriented growth of 1D nanostructure arrays on solid substrates. Finally, prospects of the solution-phase approaches to 1D semiconductor nanostructures will be briefly discussed.
基金financially supported by the National Key R&D Program of China(No.2020YFC1909700)Outstanding Young and Middle-aged Science and Technology Innovation Team Project of Hubei Province,China(No.T201802)the National Natural Science Foundation of China(No.52004187)。
文摘Solution-phase hydrogen reduction(Sp HR)was introduced into V_(2)O_(3)preparation to overcome disadvantages of traditional reduction roasting,which include a long process,high energy consumption,and generation of pollution.The research mainly focuses onφ-pH diagrams and kinetics of SpHR.Thermodynamic analysis ofφ-pH diagrams for the V-H_(2)O system demonstrates that V_(2)O_(3)preparation via Sp HR requires a high temperature,a high vanadium concentration,and sufficient hydrogen in acidic solution.Kinetic analyses show that the activation energy of V_(2)O_(3)preparation via SpHR is 38.0679 k J/mol,indicating that the reduction is controlled by a combination of interfacial chemical reaction and internal diffusion.Effects of H;partial pressure(slope K=0.05246)on the reaction rate is not as significant as the vanadium concentration(K=1.58872).V_(2)O_(3)crystals with a purity of 99.59%and a vanadium precipitation rate of 99.83%were obtained under the following conditions:pH=5-6,c(V_(2)O_(3))=0.5 mol/L,p(H;)=4 MPa,m(PdCl;)=10 mg,T=250℃,and t=2.5 h.
基金supported by the National Natural Science Foundation of China (51372075)
文摘The synthesis of high quality all-inorganic perovskite nanowires needs the harsh conditions,complex process and precision instruments,which are not beneficial to their extensive application.Here,all-inorganic perovskite ce- sium lead bromine (CsPbBr3)nanowires (NWs)are demonstrated with the combination of solution-phase process and halide exchange technology.A metal-semiconductor-metal structure CsPbBr3 nanowire photodetector was prepared, which showed a detectivity as high as 1.7×10^11 cm Hz^1/2W^-1 (Jones)with rapid response time (The rise and decay time are 10ms and 22 ms,respectively).Moreover,our photodetectors have high stability under ultraviolet (UV)light,high temperature and humidity.
基金Supported by the National Basic Research Program of China (Grant No.2005CB623601)the National Natural Science Foundation of China (Grant No.20431020)
文摘This paper reviews the solution-phase synthesis of nanoparticles via some routes at low temperatures, such as room temperature route, wave-assisted synthesis (γ-irradiation route and sonochemical route), directly heating at low temperatures, and hydrothermal/solvothermal methods. A number of strategies were developed to control the shape, the size, as well as the dispersion of nanostructures. Using diethylamine or n-butylamine as solvent, semiconductor nanorods were yielded. By the hydrothermal treatment of amorphous colloids, Bi2S3 nanorods and Se nanowires were obtained. CdS nanowires were prepared in the presence of polyacrylamide. ZnS nanowires were obtained using liquid crystal. The polymer poly (vinyl acetate) tubule acted as both nanoreactor and template for the CdSe nanowire growth. Assisted by the surfactant of sodium dodecyl benzenesulfonate (SDBS), nickel nanobelts were synthesized. In addition, Ag nanowires, Te nanotubes and ZnO nanorod arrays could be prepared without adding any additives or templates.
基金supported financially by the National Natural Science Foundation of China(No.90713045)
文摘The solution-phase synthesis of a muramyl dipeptide(MDP) analogue of N~α-[4-chlorocinnamoyl-L-alanyl-D-isoglutaminyl]-L-lysine (MDA,2) is reported that possesses the features of easy feasibility,safety and low cost in large scale of synthesis.
文摘Phakellistatin 13 is a good antitumor lead compound isolated from halobios. It was synthesized first time by solution method in combination of stepwise coupling and segment condensation. Final deprotection and cyclization were achieved according to our designed method, which was different from the reported process. The spectral data of synthetic product is consisted with literatureal data of natural product. Total synthesis of phakellistatin 13 is a significant achievement to further study of its derivatives and developing novel antitumor drugs.
基金National Natural Science Foundation of China(Grant No.21172011)
文摘To find novel lead compound, seventy-four compound libraries were built through two rounds by a solution-phase CC on the basis of our developed method for the synthesis of dithiocarbamic acid ester. After evaluation for the antitumor activities of libraries, six compounds were selected to be synthesized and examined their antitumor activities. It was found that compound 13 (HGWJ-11 C) with novel structure exhibited significant antitumor activities and the scaffold of dithiocarbamic acid was very crucial for the antitumor activity. The compound 13 is worth studying deeply as a potent hit compound.
基金the National Natural ScienceFoundation of China(No.51901206)the fund from Taihu Electric Corporation 0001.
文摘Due to easy re-stacking,low yield of few-layered MXenes(f-MXenes),the applications of MXenes are mainly restricted in multi-layered MXenes(m-MXenes)state.Although f-MXenes can be prepared from m-MXenes,after exfoliation process,a mass of sediments which are still essentially compact MXenes are usually directly discarded,leading to low utilization of raw m-MXenes.Herein,a classified preparation strategy is adopted to exploit the raw m-MXenes and traditional MXenes sediments,taking multi-layered Ti_(3)C_(2)T_(x)MXene as an example.Via rational delamination and subsequent treatment to Ti_(3)C_(2)T_(x)sediments,we succeed in achieving classified and large-scale preparation of various Ti_(3)C_(2)T_(x)MXene derivatives,including few-layered Ti_(3)C_(2)T_(x)(f-Ti_(3)C_(2)T_(x))powders,f-Ti_(3)C_(2)T_(x)films,and Ti_(3)C_(2)T_(x)MXene-derived nanowires with heterostructure of potassium titanate and Ti_(3)C_(2)T_(x).We demonstrate the necessity of“step-by-step delamination”towards traditional Ti_(3)C_(2)T_(x)sediments to improve the yield of f-Ti_(3)C_(2)T_(x)from 15%to 72%;the feasibility of“solution-phase flocculation(SPF)”to fundamentally solve the re-stacking phenomenon,and oxidation degradation issues of f-Ti_(3)C_(2)T_(x)during storage;as well as the convenience of SPF to deal with time-consuming issues of fabricating Ti_(3)C_(2)T_(x)films.What’s more,alkali-heat treatment of final Ti_(3)C_(2)T_(x)sediments turns waste into treasure of Ti_(3)C_(2)T_(x)-derived nanowires,leading to 100%utilization of raw Ti_(3)C_(2)T_(x).The content of one-dimensional(1D)nanowires in the hybrids can be adjusted by controlling alkalization time.The 3D architecture heterostructure composed of 1D nanowires and 2D nanosheets exhibits gorgeous application potential.This work can expand preparation and application of various MXenes derivatives,promoting process of various MXenes.
基金This work is financially supported by the National Natural Science Foundation of China (Nos. 51671072, 21303042, and 21671096), the Natural Science Foundation of Shenzhen (Nos. JCYJ20170412153139454 and JCYJ20150331101823677), and the Shenzhen Key Laboratory Project (No. ZDSYS201603311013489).
文摘In this artide, highly [010]-oriented self-assembled LiCoPO4/C nanoflakes were prepared through simple and facile solution-phase strategies at low temperature and ambient pressure. The formation of 5-hydroxylmethylfurfural and levoglucosan via the dehydration of glucose during the reaction played a key role in mediating the morphology and structure of the resulting products. LiCoPO4 highly oriented along the (010)-facets exposed Li^+ ion transport channels, facilitating ultrafast lithium ion transportation. In turn, the unique assembled mesoporous structure and the flake-like morphology of the prepared products benefit lithium ion batteries constructed using two-dimensional (2D) LiCoPO4/C nanoflakes self- assembles as cathodes and commercial Li4Ti5O12 as anodes. The tested batteries provide high capacities of 154.6 mA·h·g^-1 at 0.1 C (based on the LiCoPO4 weight of 1 C = 167 mA·h·g^-1) and stable cycling with 93.1% capacity retention after 100 cycles, which is outstanding compared to other recently developed LiCoPO4 cathodes.
基金financially supported by the National Science and Technology Major Project of China(No.521042)
文摘A method using N,O-bis(trimethylsilyl)acetamide/N-hydroxysuccinimide ester(BSA/NHS) as coupling agents for dipeptide synthesis is descried. The coupling reaction between N-hydroxysuccinimide(NHS)esters and amines could be performed under mild conditions with N,O-bis(trimethylsilyl)acetamide(BSA) as coupling reagent and no additional acid/base is required. All byproducts and excessive reactants are water soluble or hydrolysable and easy to eliminate through water-washing at the purification stage.Moreover, all the reactants are inexpensive and widely used in conventional drug production.
基金National Natural Science Foundation of China(NSFC-21871046)Fundamental Research Funds for the Central Universities and Graduate Student Innovation Fund of Donghua University.
文摘Main observation and conclusion We describe a practical and general protocol for immobilization of heterogeneous catalysts to mechanically robust porous ultra-high molecular weight polyethylene tablets using inter-facial Lifshitz-van der Waals Interactions.Diverse types of powderous catalysts,including Cu,Pd/C,Pd/Al2O3,Pt/C,and Rh/C have been immobilized successfully.The immobilized catalysts are mechanistically robust towards stirring in solutions,and they worked well in diverse synthetic reactions.The immobilized catalyst tablets are easy to handle and reused.Moreover,the metal leaching of immobilized catalysts was reduced significantly.