Mn-doped ZnO nanopowders prepared by sol–gel and microwave-assisted sol–gel methods and their photocatalytic properties

• Cristina Maria Vlăduț,
• Crina Anastasescu,
• Silviu Preda,
• Oana Catalina Mocioiu,
• Simona Petrescu,
• Jeanina Pandele-Cusu,
• Dana Culita,
• Veronica Bratan,
• Ioan Balint and
• Maria Zaharescu

Beilstein J. Nanotechnol. 2024, 15, 1283–1296, doi:10.3762/bjnano.15.104

• lower at the beginning (36.83 µmol·h−1) and increases significantly in the following 2.5 h (65.8 µmol·h−1). Unlike this, the MW catalyst appears to be much more active in the first half hour (61.28 µmol·h−1) than later (48.73 µmol·h−1). H2 production was also checked but only traces were found for both

Titania nanoparticles for photocatalytic degradation of ethanol under simulated solar light

• Evghenii Goncearenco,
• Iuliana P. Morjan,
• Claudiu Teodor Fleaca,
• Florian Dumitrache,
• Elena Dutu,
• Monica Scarisoreanu,
• Valentin Serban Teodorescu,
• Alexandra Sandulescu,
• Crina Anastasescu and
• Ioan Balint

Beilstein J. Nanotechnol. 2023, 14, 616–630, doi:10.3762/bjnano.14.51

• gas production has been detected for the samples from series “b”, whereas the CO2 evolution was observed for all samples from series “a”. Keywords: ethanol; H2 production; laser pyrolysis; photocatalyst; TiO2 nanoparticles; Introduction Semiconductor materials are widely used, from electronic

• -a, TO-450-a, and TO-650-a, which are quite close to P 25 in terms of an almost insignificant H2 production. This clear difference between the two catalysts series can be related to structural characteristics providing different densities of photogenerated charges (electrons) to react with protons

• use and further modification regarding H2 production. Table 4 shows an increase of acetaldehyde formation for the catalyst series “b” relative to series “a”, especially for TO-850-b. This observation is in line with the highest hydrogen production obtained by using this catalyst. Conclusion This study

Photoelectrochemical water oxidation over TiO₂ nanotubes modified with MoS₂ and g-C₃N₄

• Phuong Hoang Nguyen,
• Thi Minh Cao,
• Tho Truong Nguyen,
• Hien Duy Tong and
• Viet Van Pham

Beilstein J. Nanotechnol. 2022, 13, 1541–1550, doi:10.3762/bjnano.13.127

• of initial H+ concentration can reduce the efficiency of the H2 production. For an effective water splitting process, the oxidation reaction of OH− ions in the electrolyte needs to take place at the anode to generate e− and H+ ions along with O2. The e− current will immediately migrate to the cathode

Recent trends in Bi-based nanomaterials: challenges, fabrication, enhancement techniques, and environmental applications

• Vishal Dutta,
• Ankush Chauhan,
• Ritesh Verma,
• C. Gopalkrishnan and
• Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 1316–1336, doi:10.3762/bjnano.13.109

Spindle-like MIL101(Fe) decorated with Bi₂O₃ nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

• Chen-chen Hao,
• Fang-yan Chen,
• Kun Bian,
• Yu-bin Tang and
• Wei-long Shi

Beilstein J. Nanotechnol. 2022, 13, 1038–1050, doi:10.3762/bjnano.13.91

• photocatalyst under UV light irradiation [30]. So far, a large number of MOFs have been shown to exhibit photocatalytic activity in H2 production, organic pollutant degradation, and Cr(VI) and CO2 reduction [26][27][31][32][33]. Among MOF catalysts, MIL101(Fe) is a cage-like structure formed by self-assembly of

Nanoporous and nonporous conjugated donor–acceptor polymer semiconductors for photocatalytic hydrogen production

• Zhao-Qi Sheng,
• Yu-Qin Xing,
• Yan Chen,
• Guang Zhang,
• Shi-Yong Liu and
• Long Chen

Beilstein J. Nanotechnol. 2021, 12, 607–623, doi:10.3762/bjnano.12.50

• significantly modulate the properties and photocatalytic activities of CTFs. Pyridine-based conjugated polymers Pyridine, as a nitrogen-containing benzene analogue, was incorporated into linear conjugated polymers as early as in the 1990s. The CPs exhibited distinctive photocatalytic activity for H2 production

Synthesis of novel C-doped g-C₃N₄ nanosheets coupled with CdIn₂S₄ for enhanced photocatalytic hydrogen evolution

• Jingshuai Chen,
• Chang-Jie Mao,
• Helin Niu and
• Ji-Ming Song

Beilstein J. Nanotechnol. 2019, 10, 912–921, doi:10.3762/bjnano.10.92

• crystals on the surface of CCN nanosheets via a hydrothermal method. This unique architecture was able to efficiently promote the transfer and separation of photon-generated charges, enhance light absorption, and significantly increase photocatalytic H2 production. Detailed characterization was performed

• to analyze the crystal structure, morphology, elementary composition, optical properties and catalytic mechanism. The CdIn2S4/CCN nanocomposites with optimal CdIn2S4 content exhibited a maximum H2 production rate of 2985 μmol h−1 g−1, almost 15 times more than that obtained using pure g-C3N4 (205

• transfer nanochannels [5]. The as-prepared g-C3N4 nanosheet@ZnIn2S4 nanoleaf structure displays an enhanced photocatalytic activity for H2 production without the addition of a Pt co-catalyst. As visible-light-active photocatalysts, ternary metal sulfide (e.g., ZnIn2S4 and CdIn2S4) have attracted great

Understanding the performance and mechanism of Mg-containing oxides as support catalysts in the thermal dry reforming of methane

• Nor Fazila Khairudin,
• Mohd Farid Fahmi Sukri,
• Mehrnoush Khavarian and
• Abdul Rahman Mohamed

Beilstein J. Nanotechnol. 2018, 9, 1162–1183, doi:10.3762/bjnano.9.108

• . However, the addition of Mg caused the reduction of the RWGS reaction; thus, a high H2 production was obtained. Yan et al. [121] investigated the effects of the addition of MgO on the Ni catalyst in the DRM. In their investigation, a good dispersion of nickel oxide and MgO promoter was reported over a γ

Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

• Lan Ching Sim,
• Jing Lin Wong,
• Chen Hong Hak,
• Jun Yan Tai,
• Kah Hon Leong and
• Pichiah Saravanan

Beilstein J. Nanotechnol. 2018, 9, 353–363, doi:10.3762/bjnano.9.35

• recombination of electron–hole pairs [35]. A facile hydrothermal approach was adopted to synthesize CD/g-C3N4 using ascorbic acid as precursor to prepare CDs, showing higher hydrogen (H2) production than pure g-C3N4 under UV light irradiation [36]. A similar composite was also reported using 6-aminohexanoic

Bombyx mori silk/titania/gold hybrid materials for photocatalytic water splitting: combining renewable raw materials with clean fuels

• Stefanie Krüger,
• Michael Schwarze,
• Otto Baumann,
• Christina Günter,
• Michael Bruns,
• Christian Kübel,
• Dorothée Vinga Szabó,
• Rafael Meinusch,
• Verónica de Zea Bermudez and
• Andreas Taubert

Beilstein J. Nanotechnol. 2018, 9, 187–204, doi:10.3762/bjnano.9.21

• the limitations of H2 is the efficient and sustainable H2 production. Currently, H2 is mainly produced by steam reforming of gas and oil, by catalytic reforming, or by water electrolysis [3][4]. In 1972 Fujishima and Honda reported that TiO2 is able to split water [5], a seminal discovery that has led

• bandgap of the TiO2 semiconductors [21]. Gallo et al. used amorphous TiO2 doped with Au and/or platinum (Pt) NPs to split water under ultraviolet (UV)-A light and simulated sunlight. Best results with 1.6 mmol/(h·g) of H2 production were obtained with Au0.5Pt0.5/TiO2 catalysts [22]. Chen et al. used

• photocatalytic water splitting is shown in Equations S1–S5, Supporting Information File 1. The data reveal a significant influence of the amount of Au present in the samples on the photocatalytic efficiencies. TPS_Au10.7 shows the lowest H2 production of 4 mmol in 24 h (all values are normalized to a catalyst

Two-dimensional carbon-based nanocomposites for photocatalytic energy generation and environmental remediation applications

• Suneel Kumar,
• Ashish Kumar,
• Ashish Bahuguna,
• Vipul Sharma and
• Venkata Krishnan

Beilstein J. Nanotechnol. 2017, 8, 1571–1600, doi:10.3762/bjnano.8.159

• Photocatalytic H2 production through solar water splitting has been widely explored as it has several advantages like easy and abundant availability of raw materials, tunable electronic structure and the fact that combustion of hydrogen in air produces water; hence, this method is ecologically-friendly [96

• ]. Moreover the H2 production has attracted great attention as a renewable, sustainable energy source due to growing environmental issues [96][97]. Therefore photocatalytic water splitting has been extensively studied using various semiconductor-based materials and many new semiconductor-based photocatalysts

• acts as a supporting matrix for the CdS nanoparticles, which are about 10 nm in size. Due to the narrow band gap CdS is active in the visible region. They observed the highest H2 production rate of 314 µmol h−1 for the composition having 5 wt % of GO, as can be seen in Figure 7a. Herein, GO functions

Enhanced photocatalytic hydrogen evolution by combining water soluble graphene with cobalt salts

• Jing Wang,
• Ke Feng,
• Hui-Hui Zhang,
• Bin Chen,
• Zhi-Jun Li,
• Qing-Yuan Meng,
• Li-Ping Zhang,
• Chen-Ho Tung and
• Li-Zhu Wu

Beilstein J. Nanotechnol. 2014, 5, 1167–1174, doi:10.3762/bjnano.5.128

• makes it attractive to design and synthesize new catalysts by using graphene and earth-abundant metal salts for the photocatalytic H2 production. FTIR (a) and XPS (b) spectra of GO, G-SO3 and G-SO3 after photocatalytic hydrogen evolution Raman (a) and XRD (b) spectra of GO (black), G-SO3 (red) and G-SO3

Nanostructure sensitization of transition metal oxides for visible-light photocatalysis

• Hongjun Chen and
• Lianzhou Wang

Beilstein J. Nanotechnol. 2014, 5, 696–710, doi:10.3762/bjnano.5.82

• . reported a layer-by-layer self-assembly between positively charged CdS quantum dots and negatively charged exfoliated titanate nanosheets to design noble-metal free photocatalysts. The resultant composites exhibited a much higher photocatalytic H2 production activity than pristine titanate and CdS quantum

• alkenes under ambient conditions [102]. The similar photosensitization of graphene was also demonstrated in a ZnWO4/graphene hybrid photocatalysts for the degradation of methylene blue [103], a RGO–ZnO heterojunction for the photoelectrochemical H2 production [104], and GO–TiO2 for the photochemical water