ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganization of Organic Molecules with Inorganic Molecular Species into Nanocomposite Biphase ArraysQisheng Huo, David I. Margolese, Ulrike Ciesla, Dirk G. Demuth, Pingyun Feng, Thurman E. Gier, Peter Sieger, Ali Firouzi, Bradley F. Chmelka, and Cite this: Chem. Mater. 1994, 6, 8, 1176–1191Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissue 1 August...

Through a facile one-step combustion method, partially reduced TiO2 has been synthesized. Electron paramagnetic resonance (EPR) spectra confirm the presence of Ti3+ in bulk an as-prepared sample. The UV−vis show that here extends photoresponse from UV to visible light region, which leads high visible-light photocatalytic activity for generation hydrogen gas water. It is worth noting sites sample are highly stable air or water under irradiation and photocatalyst can be repeatedly used without...

Porous silica, niobia, and titania with three-dimensional structures patterned over multiple length scales were prepared by combining micromolding, polystyrene sphere templating, cooperative assembly of inorganic sol-gel species amphiphilic triblock copolymers. The resulting materials show hierarchical ordering several discrete tunable ranging from 10 nanometers to micrometers. respective ordered can be independently modified choosing different mold patterns, latex spheres, block examples...

Novel CdS quantum dot (QD)-coupled graphitic carbon nitride (g-C3N4) photocatalysts were synthesized via a chemical impregnation method and characterized by X-ray diffraction, transmission electron microscopy, ultraviolet–visible diffuse reflection spectroscopy, photoelectron Fourier transform infrared photoluminescence spectroscopy. The effect of content on the rate visible light photocatalytic hydrogen evolution was investigated for different loadings using platinum as cocatalyst in...

The review summarizes transition metal-based bimetallic MOFs and their derived materials as electrocatalytic for the OER. mechanisms of OER probed by DFT calculation and<italic>in situ</italic>characterization techniques are also discussed.

One of the most exciting recent developments concerning molecular architectures is emerging field crystalline chalcogenide superlattices that bridges two traditional but distinct areas research: clusters and porous materials. By combining synthetic structural concepts in these areas, many solids containing spatially organized have been created exhibit varied properties ranging from microporosity, fast ion conductivity, photoluminescence to narrow tunable electronic band gaps. The potential...

Metal-organic framework (MOF) materials have emerged as one of the favorite crystalline porous (CPM) because their compositional and geometric tunability many possible applications. In efforts to develop better MOFs for gas storage separation, a number strategies including creation open metal sites implantation Lewis base been used tune host-guest interactions. addition these chemical factors, features such pore size shape, surface area, volume also play important roles in sorption...

Crystalline semiconducting sulfide and selenide zeolite analogs were synthesized that possess four-connected, three-dimensional tetrahedral networks built from tetravalent (M4+ = Ge4+ or Sn4+, where M meta) trivalent (M3+ Ga3+ In3+) cations. Microporous materials obtained in all four combinations of M4+ M3+, some them thermally stable up to at least 380 degrees C. These exhibit framework topologies with pore size ranging 12 24 atoms, high surface area, charge density ion exchange capacity,...

Abstract The integration of heterometallic units and nanostructures into metal–organic frameworks (MOFs) used for the oxygen evolution reaction (OER) can enhance electrocatalytic performance help elucidate underlying mechanisms. We have synthesized a series stable MOFs (CTGU‐10a1–d1) based on trinuclear metal carboxylate clusters hexadentate ligand with (6,6)‐connected nia net. also present strategy to synthesize hierarchical bimetallic MOF (CTGU‐10a2–d2). Among these, CTGU‐10c2 is best...

We report the design, synthesis, and characterization of a novel heterojunction array α-Fe(2)O(3)/graphene/BiV(1-x)Mo(x)O(4) core/shell nanorod for photoelectrochemical water splitting. The was prepared by hydrothermal deposition α-Fe(2)O(3) nanorods onto Ti substrate, with subsequent coating graphene interlayer BiV(1-x)Mo(x)O(4) shell photocatalytic reduction spin-coating approach, respectively. yielded pronounced photocurrent density ∼1.97 mA/cm(2) at 1.0 V vs Ag/AgCl high photoconversion...

A simple and facile solid-state chemical reduction approach for a large-scale production of colored TiO 2 with good photocatalytic properties was developed.

A new redox-responsive hybrid nanogated ensemble has been developed by introducing the disulfide-linked polymeric network at outlet of mesoporous silica. The cross-linked polymer works as gatekeeper to control molecule release from presence disulfide reducing agent can effectively open and loading in a tunable manner.

A new pH-responsive hybrid nanogated ensemble has been developed by using acetal group linked gold nanoparticle capped mesoporous silica. The hydrolysis of linker at acidic environment makes the nanoparticles work as a gatekeeper to control release guest molecules from silica under different pH's.

Partially reduced TiO2 with highly active facets has been fabricated: Ti3+ was successfully incorporated without any additional reducing agent and surfactant, developed preferentially. The product shows improved photocatalytic activity in H2 production over previously reported material. Photocatalytic an extended time period demonstrates the stability of made by this approach.

The integration of negatively charged single-metal building blocks {In(CO2)4} and positively trimeric clusters {In3O} leads to three unique cage-within-cage-based porous materials, which exhibit not only high hydrothermal, thermal, photochemical stability but also attractive structural features contributing a very CO2 uptake capacity up 119.8 L/L at 273 K 1 atm.

A hybrid WO3/C3N4/CoOx system exhibits excellent photoelectrochemical activity for water oxidation. The comprises a novel three-dimensionally branched WO3 nanosheet array coated with layer of C3N4 heterojunctions that are further decorated CoOx nanoparticles. arises from the effective light harvesting due to 3D structure and "window effect," charge separation transport in heterojunction, fast interfacial collection surface reactions large area.

While it is not uncommon to form chiral crystals during crystallization, the formation of bulk porous homochiral materials from achiral building units rare. Reported here crystallization microporous through chirality induction effect natural alkaloids. The resulting material possesses permanent microporosity and has a uniform pore size 9.3 A.

Despite their having much greater potential for compositional and structural diversity, heterometallic metal-organic frameworks (MOFs) reported so far have lagged behind homometallic counterparts in terms of CO2 uptake performance. Now the power MOFs is full display, as shown by a series new materials (denoted CPM-200s) with superior capacity (up to 207.6 cm(3)/g at 273 K 1 bar), close all-time record set MOF-74-Mg. The isosteric heat adsorption can also be tuned from -16.4 kJ/mol...

Metal–organic frameworks (MOFs) with the highest CO2 uptake capacity are usually those equipped open metal sites. Here we seek alternative strategies and mechanisms for developing high-performance adsorbents. We demonstrate that through a ligand insertion pore space partition strategy, can create crystalline porous materials (CPMs) superior capacity. Specifically, new material, CPM-33b-Ni without any sites, exhibits comparable to MOF-74 same (Ni) at 298 K 1 bar.

A highly effective, low-cost strategy for improved photocatalytic efficiency and stability of CdS is described. Based on the integration hexagonal-cubic core-shell architecture with nanorod morphology, concentric phase junctions (NRPJs) obtained demonstrate extremely high H2 production rate unprecedented stability.