摘要：Layered transition metal hydroxides show distinct advantages in separately co-catalyzing CO_(2)reduction and H_(2)O oxidation at the electron-accumulating and hole-accumulating sites of wrapped heterojunction photocatalysts,while concurrently preventing side reactions and photocorrosion on the semiconductor ***,Ni-Co bimetallic hydroxides with varying Ni/Co molar ratios(Ni_(x)Co_(1-x)(OH)_(2),x=1,0.75,0.5,0.25,and 0)were grown in situ on a model 2D/2D S-scheme heterojunction composed of Cu_(2)O nanosheets and Fe_(2)O_(3)nanoplates to form a series of Cu_(2)O/Fe_(2)O_(3)@Ni_(x)Co_(1-x)(OH)_(2)(CF@NiCo)*** combined experimental and theoretical investigation demonstrates that incorporating an appropriate amount of Co into Ni(OH)_(2)not only modulates the energy band structure of Ni_(x)Co_(1-x)(OH)_(2),balances the electron-and hole-trapping abilities of the bifunctional cocatalyst and maximizes the charge separation efficiency of the heterojunction,but also regulates the d-band center of Ni_(x)Co_(1-x)(OH)_(2),reinforcing the adsorption and activation of CO_(2)and H_(2)O on the cocatalyst surface and lowering the rate-limiting barriers in the CO_(2)-to-CO and H_(2)O-to-O_(2)*** from the Ni-Co synergy,the redox reactions proceed *** optimized CF@Ni_(0.75)Co_(0.25)achieves CO and O_(2)yields of 552.7 and 313.0μmol gcat^(-1)h^(-1),respectively,11.3/9.9,1.6/1.7,and 4.5/5.9-fold higher than those of CF,CF@Ni,and CF@*** study offers valuable insights into the design of bifunctional noble-metal-free cocatalysts for high-performance artificial photosynthesis.

摘要：Storing solar energy in battery systems is crucial to achieving a green and sustainable ***,the efficient development of photo-enhanced zinc-air batteries(ZABs)is limited by the rapid recombination of photogenerated carriers on the *** this work,the visible-light-driven CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst with unique petal-like layer structure was designed and developed,which can be used as air electrode for visible-light-driven *** superior performance of ZABs assembled by CoS_(2)/CuS@CNT-C_(3)N_(4)was mainly attributed to the successful construction of Schottky heterojunction between g-C_(3)N_(4)and carbon nanotubes(CNTs),which accelerates the transfer of electrons from g-C_(3)N_(4)to CoS_(2)/CuS cocatalysts,improves the carrier separation ability,and extends the carrier ***,the visible-driven ZABs assembled by CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst has a power density of 588.90 mW cm-2 and a charge-discharge cycle of 643 h under visible light irradiation,which is the highest performance ever reported for photo-enhanced *** importantly,the charge-discharge voltage drop of ZABs was only 0.54 V under visible light irradiation,which is significantly lower than the voltage drop(0.94 V)in the *** study provides a new idea for designing efficient and stable visible-light-driven ZABs cathode catalysts.

摘要：Photocatalysis provides a promising solution to the worldwide shortages of energy and industrially important raw materials by utilizing sunlight for coupled hydrogen(H_(2))production with controllable organic ***,we demonstrate that PtFeNiCoCu high-entropy alloy(HEA)nanocrystals can act as efficient cocatalysts for H_(2)evolution coupled with selective oxidation of cinnamyl alcohol to cinnamaldehyde by cubic cadmium sulfide(CdS)quantum dots(QDs)with uniform sizes of 4.0±0.5 *** nanocrystals were prepared via a simple solvothermal approach,and were successfully integrated with CdS QDs by an electrostatic self-assembly method to construct HEA/CdS *** optimized HEA/CdS sample presented an enhanced photocatalytic H_(2)production rate of 7.15 mmol g^(-1)h^(-1),which was 13 times that of pure CdS ***,a cinnamyl alcohol conversion of 96.2%with cinnamaldehyde selectivity of 99.5%was achieved after photoreaction for 3 *** integration of HEA with CdS QDs extended the optical absorption edge from 475 to 484 *** d-band center analysis,Pt atoms in the HEA are the active sites for H_(2)evolution,exhibiting higher catalytic activity than pure ***,the band structure of the CdS QDs enables the oxidative transformation of cinnamyl alcohol to cinnamaldehyde with high ***,femtosecond transient absorption spectroscopy shows that HEA can significantly promote the separation of photogenerated carriers in CdS,which is vital for achieving enhanced photocatalytic *** work inspires atomic-level design of photocatalytic materials for coordinated production of green energy carriers and value-added products.

摘要：The photocatalytic degradation kinetics of carbofuran was optimized by central composite design based on response surface methodology for the first time. Three variables, TiO2 concentration, initial pH value and the concentration of carbofuran, were selected to determine the dependence of degradation efficiencies on independent variables. Response surface methodology modeling results indicated that the degradation efficiency of carbofuran was highly affected by the initial pH value and the concentration of carbofuran. Then nine degradation intermediates were detected by HPLC/MS/MS. The Frontier Electron Densities of carbofuran were calculated to predict the active sites on carbofuran attacked by hydroxyl radicals and photoholes. Point charges were used to elucidate the chemisorption pattern on TiO2 catalysts during the photocatalytic process. By combining the experimental results and calculation data, the photocatalytic degradation pathways of carbofuran were proposed, including the addition of hydroxyl radicals and the cleavage of the carbamate side chain.

摘要：A novel type of chiral molecular tweezers has been designed and synthesized by using deoxycholic acid as backbone and ethanoyl and the chiral unsymmetrical urea unit as arms. Their structures were characterized by 1H NMR, IR, MS spectra and elemental analysis. These molecular tweezers showed good binding ability for neutral molecules and chiral molecules.

摘要：A novel type of molecular tweezer receptors based on deoxycholic acid has been designed and synthesized and their binding properties were examined by UV-vis spectral titration. These molecular tweezers showed a high selectivity toward F^- over Cl^-, Br^-, I^-, AcO^-, H2PO4^-.

摘要：Two new metal-organic frameworks（MOFs）,[Cu2（H_2O）_2（BCPIA）]（BUT-20）and（Me_2NH_2）[In（BCPIA）]（BUT-21）were designed and synthesized through the solvothermal reaction between a newly created desymmetric 4-connected ligand,5-（2,6-bis（4-carboxyphenyl）pyridin-4-yl）isophthalic acid（H_4BCPIA）and Cu（NO_3）2 2.5H_2O or In（NO_3）_3·5H_2O,respectively,and characterized by single-crystal and powder Xray diffraction,thermogravimetric analysis,infrared spectroscopy,and elemental *** two MOFs have three-dimensional structures,in which both the BCPIA 4 ligand and metal-containing entities,Cu_2（COO）_4（H_2O）_2 and In（COO）_4 act as 4-connected ***,different linkage configurations of the two metal-containing nodes,quadrilateral Cu_2_TD_2（COO）_4（H_2O）_2and tetrahedral In（COO）_4,lead to distinct structural networks of BUT-20 and 21,with Nbo and Unc topologies,respectively.

摘要：Disposal of the pollutants arising from farming cattle and other livestock threatens the environment and public safety in diverse ***,we report on the synthesis of engineered biochars using cow dung as raw material,and investigating these biochars as antibacterial agents for water *** coating the biochars with N-halamine polymer and loading them with active chlorine (i.e.,Cl+),we were able to regulate them on demand by tuning the polymer coating and bleaching *** obtained N-halamine-modified biochars were found to be extremely potent against Escherichia coli and Staphylococcus *** also investigated the possibility of using these N-halamine-modified biochars for bacterial decontamination in real-world *** findings indicated that a homemade filter column packed with N-halamine-modified biochars removed pathogenic bacteria from mining sewage,dairy sewage,domestic sewage,and artificial *** proposed strategy could indicate a new way for utilizing livestock pollutants to create on-demand decontaminants.

摘要：Sluggish kinetics of anodic hydrogen oxidation reaction(HOR)in alkaline media,which arises from the two orders of magnitude lower HOR activity in alkali than that in acid media for platinum group metals,hinders the commercial implementation of anion exchange membrane fuel cells(AEMFCs).Consequently,the development of platinum-based catalysts combined with high efficiency and durability is urgently ***,we report a facile route for the synthesis of ternary PtRuTe alloy nanofibers with Pt atomic ratio of only 11%via a simple galvanic replacement *** optimize the adsorption strength of platinum and ruthenium towards hydrogen and hydroxyl species by regulating the electron donation from tellurium to platinum and ***,the obtained trimetallic alloy catalyst exhibits an impressive kinetic current density of 30.6 mA cm^(−2)_(geo) at 50 mV and an exchange current density of 0.426 mA cm^(−2)_(metal),which shows 3.0-and 2.5-fold enhancement compared with the commercial Pt/C in alkaline electrolyte,***,the catalyst also demonstrates excellent stability with merely 5%activity attenuation after 2000 potential *** work offers new pathways to boost alkaline HOR by rationally designing multicomponent alloys.

摘要：A successful qualitative and quantitative analysis of polycyclic aromatic hydrocarbons (PAHs) in air-borne particulates in Hong Kong City has been carried out by the heuristic evolving latent projection (HELP) method recently developed in chemometrics. The resolution result showed that 47 compounds were involved in this sample. Eighteen of them were interesting PAHs and/or their derivatives. The result agreed very well with the one obtained by capillary column GGMS. The resolved UV-visible spectra match well with the standards. With the help of HELP method, accurate quantitative results were also obtained for all the overlapping peaks. The separation ability of chromatography is greatly enhanced by chemometric methods. The HELP method provides a completely new way for quick and accurate analysis of the two-dimensional data produced by hyphenated chromatographic instruments.