Hollow CdS nanotubes with ZIF-8 as co-catalyst for enhanced photocatalytic activity.
TL;DR: In this paper, a CdS/ZIF-8 heterojunction was designed for water splitting and achieved the optimal photocatalytic hydrogen production performance (2.10mmolg−g−1 L−1), which was 35 times higher than pristine CcS (0.06mmol g−1·L−1).
About: This article is published in Journal of Colloid and Interface Science.The article was published on 2022-01-15. It has received 14 citations till now. The article focuses on the topics: Heterojunction & Photocatalysis.
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TL;DR: In this paper , a ternary photocatalyst named Ag-AgBr/g-C3N4/ZIF-8 (A/g/Z) was prepared by ionic liquid assisted in-situ growth method.
9 citations
TL;DR: In this article , the structural and electronic properties, synthesis methods and various photocatalytic applications of CuInS2 QDs are systematically expounded, combined with the existing modification approaches for the enhancement of their performances.
7 citations
TL;DR: In this article , a 0D p-type NiS species was developed in situ on the large surface of NiAl-LDH by controlled vulcanization, which accelerated the faster separation and migration of charge carriers and yielded improved photocatalytic hydrogen evolution.
Abstract: Owing to the creation of a large number of surface active sites, surface modification is an efficient strategy for improving the catalytic performances of photocatalysts. Herein, zero-dimensional (0D) p-type NiS species were developed in situ on the large surface of NiAl-LDH by controlled vulcanization. Importantly, the development of the 0D p-type NiS species not only enriched the active sites but also triggered the in situ formation of a NiS/NiAl-LDH p–n heterojunction due to NiAl-LDH, which was utterly underdeveloped in the vulcanization modification procedure. This undoubtedly accelerated the faster separation and migration of charge carriers and yielded improved photocatalytic hydrogen evolution. The optimum hydrogen production rate of the NiS/NiAl-LDH photocatalyst could reach 3408 μmol·g–1·h–1 using a 5 W LED simulation visible light, which was 52-fold that of NiAl-LDH. The design and construction of the in situ p–n heterojunction may provide a perspective for the formation of p–n heterojunction photocatalysts with a closer contact interface and highly enhanced photocatalytic activity.
6 citations
TL;DR: In this article , the CdS1-xSex solid-solution nanocrystals were successfully synthesized by an accessible photo-induced self-transformation route, including the direct formation of dispersible Cadmium sulfide (CdS) 1-x(SeS)x and the in situ selftransformation of selenosulfide ((SeS2-) to Se2- by photoexcited electrons.
5 citations
TL;DR: In this article , the 4, 4,4,4 4-(porphyrin-5,10,15,20-tetrayl) tetrakis (benzoic acid) (TCPP) ligand was introduced into UiO-66-NH2 through one-pot synthesis to form Zr-TCPP.
5 citations
References
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TL;DR: It is shown that MOFs provide a powerful platform to study photocatalysis, in which the involved three key processes, namely, light harvesting, electron-hole separation, and surface redox reactions, can be rationally improved.
Abstract: ConspectusTo meet the ever-increasing global demand for energy, conversion of solar energy to chemical/thermal energy is very promising. Light-mediated catalysis, including photocatalysis (organic transformations, water splitting, CO2 reduction, etc.) and photothermal catalysis play key roles in solar to chemical/thermal energy conversion via the light–matter interaction. The major challenges in traditional semiconductor photocatalysts include insufficient sunlight utilization, charge carrier recombination, limited exposure of active sites, and particularly the difficulty of understanding the structure–activity relationship. Metal–organic frameworks (MOFs), featuring semiconductor-like behavior, have recently captured broad interest toward photocatalysis and photothermal catalysis because of their well-defined and tailorable porous structures, high surface areas, etc. These advantages are beneficial for rational structural modulation for improved light harvesting and charge separation as well as other eff...
759 citations
TL;DR: A facile one-pot wet-chemical method is developed to prepare MS2-CdS (M=W or Mo) nanohybrids, which possess a large number of edge sites in the MS2 layers, which are active sites for the HER.
Abstract: Exploration of low-cost and earth-abundant photocatalysts for highly efficient solar photocatalytic water splitting is of great importance. Although transition-metal dichalcogenides (TMDs) showed outstanding performance as co-catalysts for the hydrogen evolution reaction (HER), designing TMD-hybridized photocatalysts with abundant active sites for the HER still remains challenge. Here, a facile one-pot wet-chemical method is developed to prepare MS2–CdS (M=W or Mo) nanohybrids. Surprisedly, in the obtained nanohybrids, single-layer MS2 nanosheets with lateral size of 4–10 nm selectively grow on the Cd-rich (0001) surface of wurtzite CdS nanocrystals. These MS2–CdS nanohybrids possess a large number of edge sites in the MS2 layers, which are active sites for the HER. The photocatalytic performances of WS2–CdS and MoS2–CdS nanohybrids towards the HER under visible light irradiation (>420 nm) are about 16 and 12 times that of pure CdS, respectively. Importantly, the MS2–CdS nanohybrids showed enhanced stability after a long-time test (16 h), and 70 % of catalytic activity still remained.
624 citations
TL;DR: In this article, a CdS/WO3 nano-junction achieving a Z-scheme for clean hydrogen fuel evolution by mimicking the natural photosynthesis was constructed.
Abstract: Natural photosynthesis is usually recognized as an efficient mechanism to achieve solar energy conversion. We construct a CdS/WO3 nanojunction achieving a Z-scheme for clean hydrogen fuel evolution by mimicking the natural photosynthesis. Although WO3 alone cannot be used for H2 evolution from water splitting, it can significantly increase the H2 evolution activity of CdS through a Z-scheme mechanism with lactate as electron donor. The CdS/WO3 photocatalyst has a high H2 evolution rate of 369 μmol g–1 h–1 at a CdS concentration of 20 wt %, which is 5 times as high as that of CdS with lactic acid as electron donor. For further improving the hydrogen production rate, we introduce the noble metal Pt to ameliorate the charge transport between CdS and WO3. Good H2 evolution rates up to 2900 μmol g–1 h–1 were obtained with WPC3, which is about 7.9 times the rate of WC20 with visible radiation. The interesting thing is that the photocatalytic mechanism of CdS/WO3 is different from the previously reported mechani...
566 citations
TL;DR: A class of novel hollow porous carbons, featuring well dispersed dopants of nitrogen and single Zn atoms, have been fabricated, based on the templated growth of a hollow metal-organic framework precursor, followed by pyrolysis, which achieves efficient catalytic CO2 cycloaddition with epoxides.
Abstract: The development of efficient and low energy-consumption catalysts for CO2 conversion is desired, yet remains a great challenge. Herein, a class of novel hollow porous carbons (HPC), featuring well dispersed dopants of nitrogen and single Zn atoms, have been fabricated, based on the templated growth of a hollow metal-organic framework precursor, followed by pyrolysis. The optimized HPC-800 achieves efficient catalytic CO2 cycloaddition with epoxides, under light irradiation, at ambient temperature, by taking advantage of an ultrahigh loading of (11.3 wt %) single-atom Zn and uniform N active sites, high-efficiency photothermal conversion as well as the hierarchical pores in the carbon shell. As far as we know, this is the first report on the integration of the photothermal effect of carbon-based materials with single metal atoms for catalytic CO2 fixation.
445 citations
TL;DR: Through interstitial P doping, the impurity level of S vacancies is located near the Fermi level and becomes an effective electron trap level in CdS-P, which can change dynamic properties of photogenerated electrons and thus prolong their lifetimes.
Abstract: Photocatalytic hydrogen evolution from pure water is successfully realized by using interstitial P-doped CdS with rich S vacancies (CdS-P) as the photocatalyst in the absence of any electron sacrificial agents. Through interstitial P doping, the impurity level of S vacancies is located near the Fermi level and becomes an effective electron trap level in CdS-P, which can change dynamic properties of photogenerated electrons and thus prolong their lifetimes. The long-lived photogenerated electrons are able to reach the surface active sites to initiate an efficient photocatalytic redox reaction. Moreover, the photocatalytic activity of CdS-P can be further improved through the loading of CoP as a cocatalyst.
407 citations