Emerging strategies in the sustainable removal of antibiotics using semiconductor-based photocatalysts

• Yunus Ahmed,
• Keya Rani Dutta,
• Parul Akhtar,
• Md. Arif Hossen,
• Md. Jahangir Alam,
• Obaid A. Alharbi,
• Hamad AlMohamadi and
• Abdul Wahab Mohammad

Beilstein J. Nanotechnol. 2025, 16, 264–285, doi:10.3762/bjnano.16.21

• advanced methods, including sol–gel, hydrothermal, solvothermal, precipitation and template-assisted techniques [53]. The synthesis method chosen often depends on factors such as the desired crystal structure, particle size, surface area, and photocatalytic activity required for the specific application

• effective segregation of light-induced charge carriers allows the CB of the second semiconductor and the VB of the first semiconductor to engage in reduction and oxidation processes, thus enhancing the photocatalytic activity. Although type-II heterojunctions can restrict photogenerated charge recombination

• applications where natural light is abundant. Although TiO2 has a high photocatalytic activity under UV light, its practical use is limited because of rapid electron–hole recombination and insufficient visible light absorption [65]. Hence, it is critical to develop effective strategies to enhance TiO2 activity

Preferential enrichment and extraction of laser-synthesized nanoparticles in organic phases

• Theo Fromme,
• Maximilian L. Spiekermann,
• Florian Lehmann,
• Stephan Barcikowski,
• Thomas Seidensticker and
• Sven Reichenberger

Beilstein J. Nanotechnol. 2025, 16, 254–263, doi:10.3762/bjnano.16.20

• of gold in acetone did not lead to carbon shells, whereas the formation of carbon shells during the LAL of copper in acetone has been reported [35]. This observation was discussed to be linked to the catalytic activity of copper for C–C bond formation [53][54]. Accordingly, a stronger carbon

Radiosensitizing properties of dual-functionalized carbon nanostructures loaded with temozolomide

• Radmila Milenkovska,
• Nikola Geskovski,
• Dushko Shalabalija,
• Ljubica Mihailova,
• Petre Makreski,
• Dushko Lukarski,
• Igor Stojkovski,
• Maja Simonoska Crcarevska and
• Kristina Mladenovska

Beilstein J. Nanotechnol. 2025, 16, 229–251, doi:10.3762/bjnano.16.18

• photodynamic therapy can be obtained [1][2][3][4][5]. It has been shown that CNs have an anti-amyloid aggregation activity, and some of them (i.e., carbon nanotubes (CNTs) and graphene) are able to interface with neurons and neuronal circuits and play an important role in the modulation of neurobiological

• processes, including neuroregeneration, neuronal differentiation, and stimulation of neuronal electrical signalization and brain activity. Thus, they are promising materials for new products regarding tissue engineering and prosthetic neuronal devices [6][7][8]. There is also an evidence that CNs manifest

• enable transport and delivery to brain tumors. Inorganic nanostructures as TMZ carriers have shown several advantages compared to organic ones with respect to physicochemical stability and potency/cytotoxic activity, overcoming their main disadvantages, that is, hydrophobicity/fluidity and toxicity by

Synthesis and the impact of hydroxyapatite nanoparticles on the viability and activity of rhizobacteria

• Bedah Rupaedah,
• Indrika Novella,
• Atiek Rostika Noviyanti,
• Diana Rakhmawaty Eddy,
• Anna Safarrida,
• Abdul Hapid,
• Zhafira Amila Haqqa,
• Suryana Suryana,
• Irwan Kurnia and
• Fathiyah Inayatirrahmi

Beilstein J. Nanotechnol. 2025, 16, 216–228, doi:10.3762/bjnano.16.17

• as Fe, Al, and Ca. Thus, soluble phosphate forms that plants can absorb are formed. The organic acids generated by rhizobacteria facilitate the formation of phosphate complexes, producing H2PO4− and the subsequent appearance of clear zones within the medium [35][36]. Nitrogen-fixing activity of

• rhizobacteria-nHA The nitrogen-fixing activity of rhizobacteria after loading onto the nHA carrier was evaluated qualitatively by monitoring the color transition in nitrogen-free bromothymol (NFB) medium from yellow to blue. The results presented in Table 6 and Figure 7 indicate that all rhizobacteria loaded

• rhizobacteria, Pd and Tb rhizobacteria, decreased. nHA utilized as a carrier for rhizobacteria demonstrated good compatibility, as the loaded rhizobacteria retained their phosphate-solubilization activity, evident from the appearance of clear zones. Additionally, the nitrogen-fixing activity was maintained as

Recent advances in photothermal nanomaterials for ophthalmic applications

• Jiayuan Zhuang,
• Linhui Jia,
• Chenghao Li,
• Rui Yang,
• Jiapeng Wang,
• Wen-an Wang,
• Heng Zhou and
• Xiangxia Luo

Beilstein J. Nanotechnol. 2025, 16, 195–215, doi:10.3762/bjnano.16.16

• boundaries of thermal therapy, achieving unparalleled therapeutic effects through their diverse composite structures and demonstrating enormous potential in promoting retinal drug delivery and photoacoustic imaging. This paper provides a comprehensive summary of the structure–activity relationship between

• nanomaterials for treating various ophthalmic diseases, including ocular tumors, glaucoma, cataracts, vitreous opacity, endophthalmitis, and decreased visual acuity. It also summarizes the structure–activity relationships between the photothermal properties of these materials and novel therapeutic mechanisms

• synthesis of AuNPs and served as a surface coating for AuNPs, promoting the coupling of DOX, enhancing anti-tumor activity, and improving the biocompatibility of AuNPs. The significant extinction coefficient of these nanoparticles enhances the contrast in photoacoustic imaging within the tumor region

Clays enhanced with niobium: potential in wastewater treatment and reuse as pigment with antibacterial activity

• Silvia Jaerger,
• Patricia Appelt,
• Mario Antônio Alves da Cunha,
• Fabián Ccahuana Ayma,
• Ricardo Schneider,
• Carla Bittencourt and
• Fauze Jacó Anaissi

Beilstein J. Nanotechnol. 2025, 16, 141–154, doi:10.3762/bjnano.16.13

• cereus (ATCC 10876) and Proteus mirabilis (ATCC 35649). The analysis revealed remarkable antibacterial activity against Proteus mirabilis, suggesting a preferential selectivity for Gram-negative bacteria. Keywords: adsorption; bentonite; hybrid pigment; niobium; photocatalysis; water remediation

• characterized through colorimetric analysis (CIEL*a*b*) and UV–vis spectroscopy. Antimicrobial activity test The antimicrobial properties of the BEPh, BEOx, A-BEPh, A-BEOx, A-BEPhP, and A-BEOxP samples were investigated against the bacteria Bacillus cereus (ATCC 10876) (Gram-positive) and Proteus mirabilis

• of the TTC dye (0.125% w/v - 2,3,5-triphenyltetrazolium chloride 0.125%) (NEON®) was added to all wells, and the plate was kept in an oven for an additional two hours. The antibacterial activity was determined by MIC, observing the presence/absence of viable bacteria due to the reaction of the TTC

Nanocarriers and macrophage interaction: from a potential hurdle to an alternative therapeutic strategy

• Naths Grazia Sukubo,
• Paolo Bigini and
• Annalisa Morelli

Beilstein J. Nanotechnol. 2025, 16, 97–118, doi:10.3762/bjnano.16.10

• characteristics [13][14]. This dynamic and complex spectrum of macrophage activity features nuanced challenges and opportunities in leveraging macrophage responses to enhance the therapeutic potential of NCs. Recent research has highlighted the dual role of macrophages in the context of nanomedicine. While their

• tissue damage and chronic inflammation. This prolonged M1 activity is a hallmark of diseases like rheumatoid arthritis (RA) and inflammatory bowel disease (IBD). The activation of M1 macrophages is primarily mediated by the nuclear factor-κB (NF-κB), which is triggered by microbial ligands binding to

• immunity and enhancing cancer immunotherapy outcomes. Additionally, natural compounds such as berberine and quercetin can modulate macrophage polarization by inhibiting M1 pathways or promoting M2 activity, highlighting the therapeutic potential of targeting macrophage states in inflammatory and

Characterization of ZnO nanoparticles synthesized using probiotic Lactiplantibacillus plantarum GP258

• Prashantkumar Siddappa Chakra,
• Aishwarya Banakar,
• Shriram Narayan Puranik,
• Vishwas Kaveeshwar,
• C. R. Ravikumar and
• Devaraja Gayathri

Beilstein J. Nanotechnol. 2025, 16, 78–89, doi:10.3762/bjnano.16.8

• potential of −60 mV. Furthermore, the synthesized nanoparticles displayed significant antibacterial activity against selected human pathogens, with the biggest inhibition zone observed against Staphylococcus aureus (22 ± 0.57 mm) and the smallest inhibition zone observed against Salmonella enterica serovar

• . When ingested in sufficient quantities, they provide health advantages as they colonize the gut, and their metabolites generally show antimicrobial and health promotion activity to the host [6][7][8]. The thick peptidoglycan layers with crosslinks and the complex cell wall structures of Gram-positive

• semiconductors. Also, ZnO NPs exhibit antimicrobial activity, targeted drug delivery, catalytic activity, and antidiabetic, larvicidal, acaricidal and anticancer activity in addition to their usage in different medical devices and pharmaceuticals [11][12][13]. We report the ecologically safe production of ZnO

Instance maps as an organising concept for complex experimental workflows as demonstrated for (nano)material safety research

• Benjamin Punz,
• Maja Brajnik,
• Joh Dokler,
• Jaleesia D. Amos,
• Litty Johnson,
• Katie Reilly,
• Anastasios G. Papadiamantis,
• Amaia Green Etxabe,
• Lee Walker,
• Diego S. T. Martinez,
• Steffi Friedrichs,
• Klaus M. Weltring,
• Nazende Günday-Türeli,
• Claus Svendsen,
• Christine Ogilvie Hendren,
• Mark R. Wiesner,
• Martin Himly,
• Iseult Lynch and
• Thomas E. Exner

Beilstein J. Nanotechnol. 2025, 16, 57–77, doi:10.3762/bjnano.16.7

A nanocarrier containing carboxylic and histamine groups with dual action: acetylcholine hydrolysis and antidote atropine delivery

• Elina E. Mansurova,
• Andrey A. Maslennikov,
• Anna P. Lyubina,
• Alexandra D. Voloshina,
• Irek R. Nizameev,
• Marsil K. Kadirov,
• Anzhela A. Mikhailova,
• Polina V. Mikshina,
• Albina Y. Ziganshina and
• Igor S. Antipin

Beilstein J. Nanotechnol. 2025, 16, 11–24, doi:10.3762/bjnano.16.2

• of acetylcholine lead to serious disturbances in the functioning of the nervous system, including death. The need for rapid administration of an antidote to restore esterase activity is critical, but practical implementation of this is often difficult. One promising solution may be the development of

• CA-RA were 0.57 mM and 0.48 mM for WI38 and Chang liver, respectively. For these cell lines, p(Hist-CA) had an IC50 higher than 1.4 mg/mL (Table 2). The agglutination activity results are shown in Figure 3. Control plate wells with erythrocytes in saline exhibited a dense layer at the bottom

• was approved by the ethical committee of the FRC Kazan Scientific Center of RAS according to Russian national ethical guidelines (protocol No. 9–2013). No organs/tissues were procured from prisoners. Hemolysis of human red blood cells The hemolytic activity of Hist-RA, CA-RA, and p(Hist-CA) were

Mechanistic insights into endosomal escape by sodium oleate-modified liposomes

• Ebrahim Sadaqa,
• Satrialdi,
• Fransiska Kurniawan and
• Diky Mudhakir

Beilstein J. Nanotechnol. 2024, 15, 1667–1685, doi:10.3762/bjnano.15.131

• cell viability assay To evaluate the cytotoxicity of the liposomal formulations, we employe the resazurin-based cell viability assay, a method widely employed and deemed reliable for assessing cell metabolic activity, which serves as an indicator of cell viability. The process involves the

Biomimetic nanocarriers: integrating natural functions for advanced therapeutic applications

• Hugo Felix Perini,
• Beatriz Sodré Matos,
• Carlo José Freire de Oliveira and
• Marcos Vinicius da Silva

Beilstein J. Nanotechnol. 2024, 15, 1619–1626, doi:10.3762/bjnano.15.127

• application of organic and inorganic compounds with activity against various diseases [10][11][12]. Faced with a physiological stimulus, the carrier decouples from the transported product and releases it at a specific interaction site (Figure 1-1). However, some challenges are encountered by these compounds

• (Figure 1-2C), which mask the nanocarriers and enhance biological activity (Figure 1-2D) [20]. This mimetic surface helps the device to mask epitopes potentially recognized by the immune system, thereby enhancing their biocompatibility. Additionally, the selectivity for targets and the circulation time of

• activity of polylactic glycolic acid (PLGA) nanoparticles coated with membranes, Zhang et al. (2021) tested nanoparticles loaded with gambogic acid and coated with red-blood-cell-derived membranes in colorectal cancer cells. They demonstrated a reduction in phagocytosis, increasing the circulation time of

Natural nanofibers embedded in the seed mucilage envelope: composite hydrogels with specific adhesive and frictional properties

• Agnieszka Kreitschitz and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2024, 15, 1603–1618, doi:10.3762/bjnano.15.126

• friction better fulfil their biological role than mucilaginous seeds with just low friction, which was demonstrated in our experiment with pigeons (see below). Friction after chemical and thermal treatments The antimicrobial activity of seed mucilage was previously described for Linum usitatissimum [105

• as food, agriculture, and medicine [20][114][115]. Diverse other substances and systems with antimicrobial activity (antibiotics, essential oils, phenolics, and metal nanoparticles) can be incorporated into the mucilage hydrogels, which after some additional modifications can be used for the

Liver-targeting iron oxide nanoparticles and their complexes with plant extracts for biocompatibility

• Shushanik A. Kazaryan,
• Seda A. Oganian,
• Gayane S. Vardanyan,
• Anatolie S. Sidorenko and
• Ashkhen A. Hovhannisyan

Beilstein J. Nanotechnol. 2024, 15, 1593–1602, doi:10.3762/bjnano.15.125

• , unlike their complexes. All agents exert a hypolipidemic effect by lowering LDL, despite maintaining the synthetic functions of the liver. Fe3O4 NPs increase the activity of GPO, which is associated with their peroxidase-like properties. A multifaceted and diverse mechanism of action of all studied

• evaluation of hepatotoxicity based on alanine aminotransferase (ALT) activity values revealed no direct hepatotoxicity from the agents tested in groups I (3.54 ± 0.7 U/L), II (7.07 ± 0.7 U/L), V (3.54 ± 0.7 U/L), and VI (3.54 ± 0.7 U/L) compared to the control (for details on the compounds administered to

• each group, see Experimental section, “Animal experiment model”). However, co-administration of T. polium extract and Fe3O4 NPs (group III), as well as of rutin and Fe3O4 NPs (group IV), resulted in increased ALT activity relative to normal values (up to 10.6 ± 0.7 U/L) by 2.1 and 3.3 times

Facile synthesis of size-tunable L-carnosine-capped silver nanoparticles and their role in metal ion sensing and catalytic degradation of p-nitrophenol

• Akash Kumar,
• Ridhima Chadha,
• Abhishek Das,
• Nandita Maiti and
• Rayavarapu Raja Gopal

Beilstein J. Nanotechnol. 2024, 15, 1576–1592, doi:10.3762/bjnano.15.124

• (2.8 μM) for As3+, and 245.49 ppb (4.7 μM) for Cr3+. Additionally, these nanoparticles demonstrated catalytic activity regarding the degradation of p-nitrophenol (P-NP), achieving complete degradation of 0.25 and 1 mM solutions within 5 and 10 min, respectively. This study reveals the potential of ʟ

• conductivity, and potent catalytic activity, make them ideal candidates for environmental monitoring and remediation [3]. Modifying silver nanoparticles with various biological molecules, peptides, proteins, and enzymes has further enhanced their functionality, stability, and selectivity towards specific

• through surface chemistry and other parameters such as size and shape [13]. Kästner and Thünemann described the catalytic degradation of P-NP using silver nanoparticles with the activity depending on the capping agents [14]. To design a dual-functional system for environmental applications, a potential

Green synthesis of silver nanoparticles derived from algae and their larvicidal properties to control Aedes aegypti

• Matheus Alves Siqueira de Assunção,
• Douglas Dourado,
• Daiane Rodrigues dos Santos,
• Gabriel Bezerra Faierstein,
• Mara Elga Medeiros Braga,
• Severino Alves Junior,
• Rosângela Maria Rodrigues Barbosa,
• Herminio José Cipriano de Sousa and
• Fábio Rocha Formiga

Beilstein J. Nanotechnol. 2024, 15, 1566–1575, doi:10.3762/bjnano.15.123

• as phenols, ascorbic acid, flavonoids, polyphenolics, alkaloids, and terpenes, which could act as reducing agents [21]. This review focuses on AgNPs produced in a green and sustainable way through the use of natural products as reducing agents, namely seaweed extracts. The activity of AgNPs upon A

• . These compounds act by reducing Ag+ ions to Ag0 and stabilize nanoparticles by capping [58] (Figure 2). Larvicidal activity of AgNPs against Aedes aegypti Aedes aegypti, also known as the dengue mosquito, is a vector of important arboviruses, including Dengue, Zika, Chikungunya and Yellow Fever [6][59

• lead to oxidation and degradation of enzymes and organelles in the intracellular space of cells, affecting cellular physiological processes, leading to large-scale apoptosis and, consequently, larval death. Vinoth, et al. [51] evaluated the larvicidal activity of AgNPs from S. polycystum seaweed

Ultrablack color in velvet ant cuticle

• Vinicius Marques Lopez,
• Wencke Krings,
• Juliana Reis Machado,
• Stanislav Gorb and
• Rhainer Guillermo-Ferreira

Beilstein J. Nanotechnol. 2024, 15, 1554–1565, doi:10.3762/bjnano.15.122

• occurs in forested habitats adjoining open landscapes. Demonstrating remarkable mobility, it covers significant distances in pursuit of hosts on the ground. While sightings may occur throughout the day, peak activity typically coincides with the early morning and late afternoon, during periods of subdued

• defenses against predators. Given their characteristics and life habits, such as diurnal activity, striking colors, and inability to fly, it is expected that they would be frequent targets for predators. However, there is limited observational and experimental evidence documenting interactions between

The round-robin approach applied to nanoinformatics: consensus prediction of nanomaterials zeta potential

• Dimitra-Danai Varsou,
• Arkaprava Banerjee,
• Joyita Roy,
• Kunal Roy,
• Giannis Savvas,
• Haralambos Sarimveis,
• Ewelina Wyrzykowska,
• Mateusz Balicki,
• Tomasz Puzyn,
• Georgia Melagraki,
• Iseult Lynch and
• Antreas Afantitis

Beilstein J. Nanotechnol. 2024, 15, 1536–1553, doi:10.3762/bjnano.15.121

• a broad range of computational and data-driven methodologies for the exposure, hazard, and risk assessment of NMs, such as quantitative structure–activity relationship models adapted to the specificities of NMs (nanoQSAR) and grouping/read-across models, specifically developed to accurately predict

• [48]. Both the QSPR and read-across approaches are extensively used for data gap filling (predicting activity/property/toxicity values of compounds devoid of experimentally derived endpoint values). Recently, Luechtefeld et al. [49] introduced the concept of classification-based read-across structure

• –activity relationship (RASAR) by combining the concepts of read-across and QSAR using ML algorithms. Banerjee and Roy [50] merged chemical read-across and regression-based QSAR into quantitative RASAR (q-RASAR). Several ML models can be applied including partial least squares (PLS), linear support vector

Electrochemical nanostructured CuBTC/FeBTC MOF composite sensor for enrofloxacin detection

• Thi Kim Ngan Nguyen,
• Tien Dat Doan,
• Huy Hieu Luu,
• Hoang Anh Nguyen,
• Thi Thu Ha Vu,
• Quang Hai Tran,
• Ha Tran Nguyen,
• Thanh Binh Dang,
• Thi Hai Yen Pham and
• Mai Ha Hoang

Beilstein J. Nanotechnol. 2024, 15, 1522–1535, doi:10.3762/bjnano.15.120

• extensively used in livestock and aquaculture as an antibacterial agent, showing high activity against both Gram-negative and Gram-positive bacteria [1][2]. ENR, like other fluoroquinolones, is used to treat susceptible bacteria responsible for infections of the skin and soft tissue. The overuse of ENR causes

• peak position shifted to more negative values compared to the CPE. This phenomenon highlights the significantly enhanced catalytic activity of the modified electrode. Additionally, the (Cu)(Fe)BTC@CPE electrode exhibited a significantly sharper, more symmetric, and higher peak than both the CuBTC@CPE

• and FeBTC@CPE electrodes. These observations support the conclusion regarding the synergistic effects of the catalytic activity of CuBTC and the good conductivity of FeBTC, which together contribute to the enhanced performance of the electrode. Effect of MOF content on the enrofloxacin signal The

Integrating high-performance computing, machine learning, data management workflows, and infrastructures for multiscale simulations and nanomaterials technologies

• Fabio Le Piane,
• Mario Vozza,
• Matteo Baldoni and
• Francesco Mercuri

Beilstein J. Nanotechnol. 2024, 15, 1498–1521, doi:10.3762/bjnano.15.119

Polymer lipid hybrid nanoparticles for phytochemical delivery: challenges, progress, and future prospects

• Iqra Rahat,
• Pooja Yadav,
• Aditi Singhal,
• Mohammad Fareed,
• Jaganathan Raja Purushothaman,
• Mohammed Aslam,
• Raju Balaji,
• Sonali Patil-Shinde and
• Md. Rizwanullah

Beilstein J. Nanotechnol. 2024, 15, 1473–1497, doi:10.3762/bjnano.15.118

• physiological conditions, such as varying pH levels, temperature, and enzymatic activity. Degradation reduces the effective concentration of the phytochemical, diminishing its therapeutic potential [28][29]. Rapid metabolism and clearance further complicate phytochemical delivery. Phytochemicals are often

• PLHNPs can also involve the incorporation of stimuli-responsive moieties onto the nanoparticle surface. These moieties enable the nanoparticles to respond to specific stimuli, such as pH changes, temperature shifts, or enzyme activity, thereby triggering controlled drug release at the target site [70][71

• short half-life. Additionally, CUR is photosensitive and has limited chemical stability during manufacturing and storage [80][81]. To overcome these limitations, Kumar et al. developed CUR-encapsulated PLHNPs and evaluated their anticancer activity against MCF-7 cells [82]. The developed CUR-PLHNPs

Nanotechnological approaches for efficient N2B delivery: from small-molecule drugs to biopharmaceuticals

• Selin Akpinar Adscheid,
• Akif E. Türeli,
• Nazende Günday-Türeli and
• Marc Schneider

Beilstein J. Nanotechnol. 2024, 15, 1400–1414, doi:10.3762/bjnano.15.113

• administration also suffers from enzymatic degradation including peptidase and protease activity, making it challenging to deliver peptides and proteins [29][30]. Yet, the intranasal route still yields lower enzymatic degradation and higher bioavailability in the brain [31]. While the challenges of the

• activity in the whole brain after the administration. Moreover, compared to the mRNA administration without liposomal formulation, the encapsulated mRNA showed higher mRNA expression than the control group, indicating successful delivery of mRNA through intranasal delivery [96]. While the results are

Hymenoptera and biomimetic surfaces: insights and innovations

• Vinicius Marques Lopez,
• Carlo Polidori and
• Rhainer Guillermo Ferreira

Beilstein J. Nanotechnol. 2024, 15, 1333–1352, doi:10.3762/bjnano.15.107

• ]. Although the functional basis of this morphology is not fully understood, these bristle-based wings may enable microwasps to sustain prolonged flight without the energetic costs typically associated with muscle activity [112][113][114]. Similar results are observed in the tiny beetle Paratuposa placentis

• more below the surface [145]. This activity is possible through the use of legs and mouthparts with morphologies highly adapted to this task, including, for example, robust spurs (legs) and large mandibles [146][147][148]. Hence, these structures and their movements while digging may be used as bionic

Nanoarchitectonics with cetrimonium bromide on metal nanoparticles for linker-free detection of toxic metal ions and catalytic degradation of 4-nitrophenol

• Akash Kumar and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 1312–1332, doi:10.3762/bjnano.15.106

• such as Hg2+ are poisonous environmental pollutants that cause damage at the DNA level by inhibiting DNA replication and DNA polymerase activity, ultimately affecting normal cell synthesis [13]. The less toxic Fe3+ is an essential nutrient for human health in a lower dose, while increasing the dose

• of 5 μL NaOH already yielded pH 12. Consequently, we chose the volume of NaOH as a parameter instead of the pH value. Catalytic degradation of 4-nitrophenol The catalytic activity of CTAB-AgNS, CTAB-AuNS, CTAB-AuNR1, and CTAB-AuNR2 was determined by reducing 4-nitrophenol (4-NP) to 4-aminophenol (4

• ). Nanoparticles dispersed in DD water were chosen as control (represented as NPs in Figure 1c). Additionally, CTAB-capped gold and silver nanoparticles have been reported for their enhanced catalytic activity. The simplest and fastest method for degradation or catalytic conversion of 4-nitrophenol is using a

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

• catalyst is generally associated with low photocatalytic activity. Accordingly, various modifiers of semiconductor nanomaterials are used to enhance separation of the photogenerated charges, causing a corresponding decrease of PL emission. The correlation between photoluminescence and photocatalytic

• activity of the modified nanomaterials can be modulated by the dopant concentration. Figure 9 shows for both investigated samples a main emission peak at 420 nm and a smaller one at 480 nm. According to the literature data, both maxima correspond to the excitonic PL related to surface oxygen vacancies and

• indicate a small difference of catalyst activity in the reaction medium (exposure to solar irradiation and presence of oxalic acid/degradative products), indicating structural differences that are worthy to be deeply investigated in a future dedicated study. Generation of reactive oxygen species ROS are