scholarly journals Comparative Study of Zn2Ti3O8 and ZnTiO3 Photocatalytic Properties for Hydrogen Production

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1372
Author(s):  
Juan C. Pantoja-Espinoza ◽  
Jorge L. Domínguez-Arvizu ◽  
Jaime A. Jiménez-Miramontes ◽  
Blanca C. Hernández-Majalca ◽  
Miguel J. Meléndez-Zaragoza ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Pechini Method ◽  
Xrd Analysis ◽  
H2 Production ◽  
Photocatalytic Properties ◽  
Crystalline Phases ◽  
Calcination Temperatures ◽  
Adsorption Desorption ◽  
Zinc Titanates

In the present work, zinc titanates (ZTO) as photocatalysts were synthesized, characterized, and evaluated aiming to study their photocatalytic properties for hydrogen production under visible-light irradiation and employing MeOH (methanol) and TEOA (Triethanolamine) as sacrificial agents. ZTO were synthesized by modified Pechini method. Characterization of materials consisted in TGA, XRD, TEM, EELS, BET, and UV–Vis. Surface interaction studies consisted of FT-IR spectroscopy and determination of MeOH and TEOA adsorption–desorption capacities on the ZTO by TGA. Zinc titanates were evaluated as photocatalyst for H2 production using an artificial visible light and monitored by GC. TGA results led to establish calcination temperatures of 550 °C (Zn2Ti3O8) and 700 °C (ZnTiO3) to reach their crystalline phases. XRD analysis of sample cds-ZTO found cubic Zn2Ti3O8 and traces of the ZnO crystalline phase, while p-ZTO exhibited a mixture of cubic and hexagonal ZnTiO3 crystalline phases. Surface area for cds-ZTO was 88 m2/g, while ZnTiO3 had 13 m2/g. Photocatalytic H2 production for cds-ZTO and p-ZTO using TEOA as sacrificial agent showed the highest photocatalytic activities generating 548 and 441 µmolH2/h.gcat. TEOA adsorption–desorption capacity was found superior on cds-ZTO and p-ZTO than that for MeOH on both samples.

scholarly journals Ultrathin Ni(ii)-based coordination polymer nanosheets as a co-catalyst for promoting photocatalytic H2-production

2019 ◽  
Vol 55 (46) ◽  
pp. 6499-6502 ◽  
Author(s):  
Zhi-Qiang Jiang ◽  
Xing-Liang Chen ◽  
Jin Lu ◽  
Yu-Feng Li ◽  
Tian Wen ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Coordination Polymer ◽  
Visible Light ◽  
H2 Production ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Production ◽  
Co Catalysts ◽  
Production Activity ◽  
Visible Light Photocatalytic

The Ni(ii) coordination polymer nanosheets were successfully exfoliated, which can be used as co-catalysts (Ni-CPNS@CdS). The optimized Ni-CPNS@CdS catalyst showed a super high visible-light photocatalytic hydrogen production activity.

scholarly journals Effect of Different Calcination Temperatures on the Structural and Photocatalytic Performance of Bi-TiO2/SBA-15

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Jing Ma ◽  
Jia Chu ◽  
Liangsheng Qiang ◽  
Juanqin Xue
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Impregnation Method ◽  
Wet Impregnation ◽  
Calcination Temperatures ◽  
New Novel ◽  
Vis Spectroscopy ◽  
Novel Material ◽  
Adsorption Desorption

The new novel material Bi-TiO2/SBA-15 was synthesized by an easy wet impregnation method. A combination of XRD, XPS, Raman, N2adsorption-desorption isotherm measurement, TEM, and solid state UV-Vis spectroscopy has been used to characterize the Bi-TiO2/SBA-15 material. It was found that SBA-15 retained the ordered hexagonal mesostructure after incorporation of TiO2and Bi. The photodecomposition of rhodamine B (RhB) in aqueous medium was selected to evaluate the photocatalytic performance of Bi-TiO2/SBA-15 under visible light irradiation (λ≥420 nm). The experiment results indicated that Bi-TiO2/SBA-15 exhibited higher photocatalytic activities than pure TiO2and Bi2O3. The influences of calcination temperature were studied. It strongly influenced the activity of the samples. The sample calcined at 550°C shows the highest photocatalytic activity in the decomposition of RhB under visible light. The catalyst preserved almost its initial photocatalytic activity after six reuses.

A two-dimensional metal–organic framework accelerating visible-light-driven H2 production

Nanoscale ◽  
2019 ◽  
Vol 11 (17) ◽  
pp. 8304-8309 ◽  
Author(s):  
Bingquan Xia ◽  
Jingrun Ran ◽  
Shuangming Chen ◽  
Li Song ◽  
Xuliang Zhang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Metal Organic Framework ◽  
H2 Production ◽  
Two Dimensional ◽  
Visible Light Driven ◽  
Metal Organic ◽  
Organic Framework

The photocatalytic performance of hydrogen production is significantly accelerated by a two-dimensional Co-based metal–organic framework.

Cadmium-free CuInS2/ZnS quantum dots as efficient and robust photosensitizers in combination with a molecular catalyst for visible light-driven H2 production in water

2018 ◽  
Vol 11 (7) ◽  
pp. 1752-1761 ◽  
Author(s):  
M. Sandroni ◽  
R. Gueret ◽  
K. D. Wegner ◽  
P. Reiss ◽  
J. Fortage ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrogen Production ◽  
Visible Light ◽  
Cobalt Catalyst ◽  
H2 Production ◽  
Photocatalytic Hydrogen Production ◽  
Molecular Catalyst ◽  
Visible Light Driven

Cadmium-free CuInS2/ZnS quantum dots as very efficient and robust photosensitizers for photocatalytic hydrogen production with a molecular cobalt catalyst.

Enhanced photocatalytic H2 production on CdS nanorods with simple molecular bidentate cobalt complexes as cocatalysts under visible light

2016 ◽  
Vol 45 (32) ◽  
pp. 12897-12905 ◽  
Author(s):  
Rana Muhammad Irfan ◽  
Daochuan Jiang ◽  
Zijun Sun ◽  
Dapeng Lu ◽  
Pingwu Du
Keyword(s):  
Ascorbic Acid ◽  
Schiff Base ◽  
Hydrogen Production ◽  
Visible Light ◽  
Production System ◽  
Schiff Base Complex ◽  
Cobalt Complexes ◽  
H2 Production ◽  
Metal Free ◽  
Cds Nanorods

A noble-metal-free photocatalytic hydrogen production system containing a simple bidentate cobalt Schiff base complex as the molecular cocatalyst, CdS nanorods as the photosensitizer, and ascorbic acid as the electron donor is reported in this paper.

Silver oxidation state effect on the photocatalytic properties of Ag doped TiO2 for hydrogen production under visible light

2015 ◽  
Vol 40 (48) ◽  
pp. 17308-17315 ◽  
Author(s):  
A. López Ortiz ◽  
M. Meléndez Zaragoza ◽  
J. Salinas Gutiérrez ◽  
M. Marques da Silva Paula ◽  
V. Collins-Martínez
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Oxidation State ◽  
Photocatalytic Properties ◽  
Doped Tio2 ◽  
State Effect

An amorphous CoSx modified Mn0.5Cd0.5S solid solution with enhanced visible-light photocatalytic H2-production activity

2018 ◽  
Vol 8 (16) ◽  
pp. 4122-4128 ◽  
Author(s):  
Mengdi Wang ◽  
Qianwen Liu ◽  
Nan Xu ◽  
Ningxi Su ◽  
Xuxu Wang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Hydrogen Production ◽  
Visible Light ◽  
Noble Metal ◽  
H2 Production ◽  
Photocatalytic Hydrogen Production ◽  
Metal Free ◽  
Production Activity ◽  
Visible Light Photocatalytic

Amorphous noble metal-free CoSx modified Mn0.5Cd0.5S with excellent photocatalytic hydrogen production activity has been successfully synthesized.

MgZnAl hydrotalcite-like compounds preparation by a green method: effect of zinc content

2014 ◽  
Vol 68 (5) ◽  
Author(s):  
Manuel Sánchez-Cantú ◽  
Lydia Pérez-Díaz ◽  
Efraín Rubio-Rosas ◽  
Victor Abril-Sandoval ◽  
Jorge Merino-Aguirre ◽  
...  
Keyword(s):  
Zinc Content ◽  
Nitrogen Adsorption ◽  
Xrd Analysis ◽  
Zinc Nitrate ◽  
Conversion Degree ◽  
Crystalline Phases ◽  
Bet Analysis ◽  
Temperature Programmed ◽  
Adsorption Desorption ◽  
Environmentally Friendly Method

AbstractA series of MgZnAl hydrotalcite-like compounds with different zinc content (1–25 mass % of nominal zinc content) were prepared by a simple and environmentally-friendly method. The solids were characterized by X-ray powder diffraction (XRD), thermogravimetric (TG), nitrogen adsorption-desorption at −196°C (BET), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and CO2 temperature-programmed desorption (CO2-TPD). Transesterification of castor oil with methanol was selected as a probe reaction to stress the effect of zinc incorporation. From the XRD analysis of fresh samples it was demonstrated that the incorporation of zinc is feasible in the nominal range of 1–10 mass % while in the samples with higher zinc content, zinc nitrate and ZnO as secondary crystalline phases were observed. Furthermore, the analysis of samples calcined at 450°C indicated the coexistence of the ZnO and MgO crystalline phases. From the EDS and TG characterizations, the zinc percentage and thermal decomposition of the samples were determined. It was revealed that the samples exhibited the characteristic platy-like habit of hydrotalcite-like compounds. The BET analysis confirmed that the calcined samples presented an increment in their specific surface area values compared with the pristine ones. It was established that the amount of basic sites diminished with the zinc incorporation, which also affected the conversion degree of the transesterification reaction.

Visible-light-driven metal-free photocatalyst based upon covalent triazine-based frameworks for enhanced hydrogen production

2021 ◽  
Author(s):  
Zunkun Tan ◽  
Peng Zhang ◽  
Qiaoshan Chen ◽  
Shengqiong Fang ◽  
Guocheng Huang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Solar Energy ◽  
Visible Light ◽  
Water Splitting ◽  
H2 Production ◽  
Green Technology ◽  
Metal Free ◽  
Visible Light Active ◽  
Visible Light Driven

Photocatalytic H2 production via water splitting has emerged as an eco-friendly and green technology to efficiently utilize the solar energy. Developing visible light active photocatalysts, especially the metal-free ones is...

Enhanced photocatalytic H2 production of cadmium-free rGO-mediated ZnS/CuS heterojunction derived from a MOF

CrystEngComm ◽  
2018 ◽  
Vol 20 (37) ◽  
pp. 5490-5495 ◽  
Author(s):  
Mei-Ling Xu ◽  
Jian-Dong Cui ◽  
Jia-Hui Zhao ◽  
Fu-Tian Liu ◽  
Kui Li
Keyword(s):  
Hydrogen Production ◽  
Charge Carrier ◽  
Visible Light ◽  
H2 Production ◽  
Light Illumination ◽  
Photocatalytic Hydrogen Production ◽  
Visible Light Illumination

The MOF-templated porous ZnS/CuS heterojunction with rGO as the charge carrier mediator exhibits enhanced photocatalytic hydrogen production under visible light illumination.

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