Article
Chemistry, Physical
Guopeng Zhu, Xiutao Yang, Yuxin Liu, Ying Zeng, Tianye Wang, Hongwen Yu
Summary: A brand-new catalyst of C-modified and N-doped TiO2 (T3FN1) was synthesized via the hydro-thermal method using Tetrabutyl titanate (TBOT) and feathers of chicken as the precursor. The catalyst exhibited a unique three-dimensional folded rod-shaped micron structure, thanks to the abundant distribution of TiO2 nanoparticles (anatase phase) around the outer surface of the feathers template. Under visible light illumination for 30 minutes, the degradation rate of TCH reached 89.8% with T3FN1, which was 1.52 times and 2.62 times higher than that of TiO2 without template (T-3) and P25, respectively. Mechanism studies revealed that the chicken feathers served as natural organic templates to enhance the dispersity of TiO2 and nitrogen in feathers was directly doped into TiO2 to improve the catalysts' response to visible light. Furthermore, the carbon in the chicken feathers acted as a transmission medium for electric charges, promoting the spatial separation of photo-induced carriers. Moreover, T3FN1 showed wide adaptability and stability within a pH range, with the degradation rate of TCH still reaching 83.15% after 5 cycles. Overall, due to its unique structure and photocatalytic performance, the catalyst holds great potential for practical wastewater treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Lantian Chang, Noman Ahmad, Ganning Zeng, Ajay Ray, Yan Zhang
Summary: The novel carbon quantum dots (CQDs) sensitized TiO2 composite, N, S-CQDs/TiO2, showed efficient reduction of Cr (VI) under visible light irradiation. Lower pH and initial concentration of Cr (VI) led to higher reduction efficiency, with the composite achieving a four-fold increase in reduction efficiency compared to pure TiO2. Additionally, the composite demonstrated good reusability and stable photocatalytic performance in real water samples. This study confirms that sensitization of TiO2 with CQDs broadens its light absorption range, expanding its application in visible-light-driven photocatalysis.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Guoqiang Deng, Xiangdong Kang, Yongqiang Yang, Lianzhou Wang, Gang Liu
Summary: In this study, skin B/N-doped red anatase TiO2 {001} nanoflakes were synthesized to overcome the limited visible light response of photocatalysts. The introduction of boron dopants and nitrogen atoms on the surface of TiO2 nanoflakes effectively shortens the charge transport path, leading to efficient visible light responsive photocatalytic activity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Lachlan Campbell, Song Ha Nguyen, Hayden K. Webb, Daniel S. Eldridge
Summary: The evolution of antibiotic resistant bacteria poses a significant threat to public health, highlighting the need for effective and persistent disinfection techniques. This study introduces photocatalytic black TiO2-x material, which can be activated by visible light to exhibit disinfecting abilities and degrade organic dyes, as well as sterilizing bacteria.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Kyong-Hwan Chung, Byung-Joo Kim, Young-Kwon Park, Sang-Chai Kim, Sang-Chul Jung
Summary: The study prepared amorphous N-doped TiO2 through sol-gel method and found that even after low-temperature heat treatment, the photocatalyst still exhibited activity under visible light, making it applicable for plastics with excellent utility.
Article
Energy & Fuels
Mehala Kunnamareddy, Karmegam Natchimuthu, Kavitha Tangavelu, Senthilkumar Palanisamy, Barathi Diravidamani, Priyadharsan Arumugam, Ranjith Rajendran
Summary: In this study, Mg-S co-doped TiO2 nanoparticles were synthesized using the sol-gel method and their photocatalytic activity under simulated visible light was examined. The Mg-S co-doped TiO2 nanoparticles exhibited a pure anatase structure with a decreased band gap energy compared to pristine TiO2. They showed excellent photocatalytic activity and achieved a maximum degradation efficiency of 94.8% for methylene blue dye. Additionally, the antimicrobial activity of Mg-S co-doped TiO2 nanoparticles against Escherichia coli and Staphylococcus aureus was investigated, and the maximum antibacterial activity was achieved by doping and co-doping with Mg/S.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Environmental
Jiao Huang, Lin Dou, Jianzhang Li, Junbo Zhong, Minjiao Li, Tao Wang
Summary: In this study, N-doped TiO2 with abundant and tunable oxygen vacancies was successfully synthesized, showing superior photocatalytic performance. The introduction of N into TiO2 resulted in higher efficiency of photogenerated electron/hole separation and demonstrated better performance in dye removal.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Ashok Kumar Chakraborty, Sumon Ganguli, Md Abdus Sabur
Summary: Photocatalysis is a promising technique that uses semiconductor metal oxides under solar energy to mineralize organics in air and water. Nitrogen-doped titanium dioxide (N-TiO2) has attracted attention due to its ability to absorb visible spectrum by lowering the band gap of pristine TiO2. Extensive research has been conducted on the synthesis methods, environmental application, and characterization techniques of N-TiO2.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Polymer Science
Byung-Geon Park
Summary: In this study, TiO2 photocatalysts doped with metal ions and nitrogen were prepared using a sol-gel method. The N/Ni/TiO2 showed the highest photocatalytic activity and sterilization efficiency among the samples tested, due to its extended light absorption region and high optical intensity.
Article
Chemistry, Physical
Shuai Dong, Suhang Chen, Fangyuan He, Jiachen Li, Hui Li, Kangzhen Xu
Summary: A new N-TiO2-X/g-C3N4 (NTCN) composite with improved photocatalytic activity was successfully designed and constructed by co-doping N and Ti3+/Ov to reduce the band gap of TiO2. The composite showed significantly higher photocatalytic degradation rate of 2,4-dinitrophenylhydrazine (2,4-DNPH) under visible light irradiation compared to monomers and other composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Sarenqiqige Bao, Huan Liu, Haiou Liang, Chunping Li, Jie Bai
Summary: A new carbon-doped ultrathin TiO2 nanosheets were successfully developed in this study, showing superior photocatalytic activity and stability, enhanced adsorption capacity for target pollutants, broadened light absorption range, and accelerated charge transfer.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Hao Peng, Jiahuan Yong, Heju Wang, Yun Gou, Fuhai Wang, Xiaogang Zheng
Summary: Solar-light driven water splitting using Cd0.5Co0.5S/SN-TiO2 nano-fibers as catalysts shows excellent photocatalytic activity and durability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Krishnan Divakaran, Amanulla Baishnisha, Vellaichamy Balakumar, Krishnan Nattamai Perumal, Chandran Meenakshi, Ramaraj Sayee Kannan
Summary: This paper describes the synthesis and characterization of a TiO2 nanoparticles assembled sulfur-doped graphitic carbon nitride (SCN) nanocomposite, which exhibits higher photocatalytic activity towards tetracycline (TC) degradation under visible light. The nanocomposite catalyst shows good stability and reusability for five consecutive photocatalytic degradation experiments, attributed to effective charge separation and less recombination of electron and hole pairs. Further optimization of catalyst weight, pH, and TC concentration were discussed, along with radical scavenger studies confirming the role of electrons and superoxide radicals in the photo-degradation of TC.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Thi-Phuong-Thao Vu, Dinh-Trinh Tran, Viet-Cuong Dang
Summary: A novel N,C,S-TiO2/WO3/rGO Z scheme photocatalyst was successfully synthesized with excellent photocatalytic performance for the degradation of Direct Blue 71. It showed high efficiency in generating effective electrons and holes under visible light, with minimal electron-hole recombination. The catalyst demonstrated superior stability and recyclability, achieving over 83.0% degradation efficiency after 3 cycles.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Weimin Ouyang, Yajun Ji, Shufen Tan, Qizhi Tian, Zhixiang Tong
Summary: A feasible route was designed to fabricate porous g-C3N4 nanosheets for compounding with visible-light-response mesoporous nitrogen and sulfur co-doped TiO2 nanoparticles. The composite of g-C3N4@N,S-TiO2 with a 1:1 mole ratio exhibited the highest photocatalytic activity, indicating the enhancement of charge separation and electron transfer efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Sharmin Sultana, Malik Abdul Rub, Marzia Rahman, Shahed Rana, Mohammad Majibur Rahman, Md Anamul Hoque, Yousef G. Alghamdi, Abdullah M. Asiri
Summary: In this study, the aggregation behaviors of PVA and TTAB in alcohols/diols media were investigated using conductivity measurements. The physico-chemical parameters and thermodynamic properties were determined. The results showed that the CMC values varied in different solvents, indicating the significant influence of solvents on the micelle formation of TTAB + PVA mixture. It was also found that PVA molecules interacted exclusively with TTAB through hydrogen bonding, ion-dipole, and hydrophobic interactions.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Md. Anamul Hoque, Shamim Mahbub, Md. Tuhinur R. Joy, Malik Abdul Rub, Shahed Rana, Dileep Kumar, Yousef G. Alghamdi, Abdullah M. Asiri, Mohammed Abdullah Khan
Summary: The micellization behavior of CTAB and BSA mixture in different diols media was studied. The critical micelle concentration (cmc) values of the mixture decreased with increasing temperature and followed the order: cmc(1,5-PD)>cmc(1,2-PrD)>cmc(2,3-BD). The degree of micelle ionization (a) increased with carbon chain length and temperature. The thermodynamic parameters and the contribution of the solvent were also evaluated.
CHEMICAL ENGINEERING COMMUNICATIONS
(2023)
Article
Chemistry, Organic
Mohammad Asad, Muhammad Nadeem Arshad, Abdullah M. Asiri, Mohammed T. N. Musthafa, Salman A. Khan, Mohd Rehan, Mohammad Oves
Summary: A series of novel N-methylspiropyrrolidine hybrids were synthesized using 1,3-dipolar cycloaddition reaction, and their structures, antibacterial activity, and mechanism of action were investigated.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Article
Optics
M. Anand, S. Suresh, S. Anandan, G. Ahalya, S. Padmapriya, K. Rangesh
Summary: The photovoltaic performance of marine red seaweed Gracilaria corticata was examined in a dye-sensitized solar cell (DSSC) using acetone and methanol as extracting solvents. The results showed that DSSCs sensitized by acetone extract exhibited higher photovoltaic performance compared to those sensitized by methanol extract.
JOURNAL OF OPTICS-INDIA
(2023)
Article
Polymer Science
Aftab Aslam Parwaz Khan, Mallikarjunagouda B. Patil, Laxmibai P. Rathod, Shivalila G. Vader, Pankaj Raizada, Pardeep Singh, Maha M. Alotaibi, Mohammad Omaish Ansari, Anish Khan, Naved Azum, Malik Abdul Rub, Muhammad Nadeem Arshad, Abdullah M. Asiri
Summary: The study assessed the potential of nanocomposite membranes (NCMs) made of sodium alginate and embedded with synthesized zeolitic imidazole framework-8 (ZIF-8) as fillers for separating gaseous mixtures generated by methane reforming. ZIF-8 crystals were synthesized through hydrothermal synthesis, with sizes ranging from 50 to 70 nm. NCMs with 15% filler loading (synthesized ZIF-8) outperformed neat polymer membranes in terms of H-2 permeability and selectivity, achieving a purity of up to 95%. However, NCMs did not perform better than neat polymer membranes in separating gas mixtures. The combination of ZIF-8 and sodium alginate as fillers is a new and worth investigating.
Article
Polymer Science
Esraa M. Bakhsh, Sher Bahadar Khan, Nujud Maslamani, Ekram Y. Danish, Kalsoom Akhtar, Abdullah M. Asiri
Summary: In this study, CMC/CuO-TiO2 beads were developed as a catalyst for the reduction of organic and inorganic contaminants. These beads demonstrated excellent catalytic activity and stability.
Article
Polymer Science
Muhammad Tariq Saeed Chani, Khasan S. Karimov, Tahseen Kamal, Noshin Fatima, Mohammed M. Rahman, Abdullah M. Asiri
Summary: Polymeric rubber and organic semiconductor H2Pc-CNT composite-based shockproof deformable infrared radiation (IR) sensors were fabricated using a rubbing-in technique. The sensors showed decreased resistance and impedance when exposed to IR irradiation, and the temperature coefficients of resistance (TCR) were 1.2 and 1.1 for the surface-type and sandwich-type sensors, respectively. The high TCR value and novel composition of the H2Pc-CNT composite make these devices attractive for bolometric applications, and their easy fabrication and low-cost materials make them commercially viable.
Article
Chemistry, Physical
Tahir Ali Sheikh, Abdullah M. Asiri, Amna Siddique, Hadi M. Marwani, Md. Rezaur Rahman, Muhammad Nadeem Akhtar, Mohammed M. Rahman
Summary: A novel electrochemical current-potential (I-V) approach was developed using a highly calcined binary metal oxide (Er2O3@NiO) semiconductor nanocomposite to detect and degrade toxic chemicals in aqueous medium. The modified glassy carbon electrode based on this semiconductor nanocomposite showed selectivity towards m-tolyl hydrazine (m-Tolyl HDZN) and good affinity towards other interfering toxic chemicals. Analytical parameters were optimized and the limit of detection (LOD) for m-Tolyl HDZN was calculated.
Article
Engineering, Chemical
Reshma Kaimal, Madappa C. Maridevaru, Aashutosh Dube, Jerry J. Wu, Anandan Sambandam, Muthupandian Ashokkumar
Summary: The study focuses on the development of a sensor for the detection of low levels of As(III) in water. By synthesizing borophene and modifying the glassy carbon electrode with it, high sensitivity detection of As(III) is achieved. The sensor is low-cost, highly selective, and has good repeatability, making it suitable for practical applications.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Mohammad Asad, Muhammad Nadeem Arshad, Abdullah M. Asiri, Hadi M. Marwani, Khalid A. Alamry, Mohammad Mahboob Alam, Syed Nazreen, Ahmed A. Elhenawy, Mohammed M. Rahman
Summary: N-Acylated-2-pyrazolines (NA2Pyr) were synthesized using chalcone and hydrazine hydrate, and their structures were determined. A metal ion sensor for lead (Pb2+) was developed by combining a conducting coating binder (PEDOT:PSS) with a NA2Pyr modified electrode (NA2Pyr/GCE). The sensor exhibited high sensitivity and a wide linear dynamic range.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Biochemistry & Molecular Biology
Zunera Khalid, Syed Salman Shafqat, Hafiz Adnan Ahmad, Munawar Ali Munawar, Sadaf Mutahir, Safaa M. Elkholi, Syed Rizwan Shafqat, Rahila Huma, Abdullah Mohammed Asiri
Summary: Diabetes is a chronic metabolic disorder characterized by high blood sugar levels due to insulin deficiency or ineffective use. Alpha-glucosidase inhibitors are commonly used to control hyperglycemia, but can cause side effects. This study synthesized and tested a new series of compounds for their alpha-glucosidase inhibition potential. The compounds 14k and 14l showed strong inhibitory activity and in silico studies confirmed their interactions with the enzyme. This research provides potential candidates for the development of new antidiabetic drugs.
Review
Biochemistry & Molecular Biology
Dhivya Sundar, Cheng-Hua Liu, Sambandam Anandan, Jerry J. J. Wu
Summary: Carbon materials with different nanostructures and high surface area have emerging applications in electrocatalytic and photocatalytic CO2 utilization. However, the photocatalytic efficiency of pristine carbon is low, so it is usually combined with other materials to increase CO2 absorption and conversion. Carbon-based materials with transition metals and organometallic complexes are commonly used as photocatalysts for CO2 reduction.
Article
Chemistry, Multidisciplinary
Subbiah Vijaya, Jegadesan Subbiah, David J. Jones, Sambandam Anandan
Summary: Bismuth-based perovskites are important materials in lead-free perovskite solar cells. A new strategy of ligand-assisted re-precipitation approach is used to improve crystallization and thin film quality. CsBi3I10-based perovskite solar cells show the highest power conversion efficiency of 2.3%.
Article
Materials Science, Multidisciplinary
Ragini Pirarath, Belqasem Aljafari, Jerry J. Wu, Sambandam Anandan
Summary: A hydrothermal approach was used to synthesize petal-like MoS2 nanosheets with hexamethylenetetramine as the exfoliating agent. The MoS2 nanosheets showed high adsorption capabilities for tartrazine dye and mercury ions, removing 99% of the contaminants within 5 minutes and 6 hours, respectively. The Freundlich isotherm model and pseudo-first-order and pseudo-second-order kinetic models were found to be applicable for the adsorption processes.
BULLETIN OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Ummu Habeeba Abdul Azeez, Dhanusha Ayyappan, T. Sabari Girisun Chidambaram, Ranvijay Singh, Jegadesan Subbiah, Anandan Sambandam
Summary: This study synthesized a series of Schiff-based organic molecules with a phenothiazine backbone and investigated their structural, optical, and nonlinear absorption properties. The Phe-Ma molecule exhibited the highest nonlinear absorption and the lowest optical limiting threshold, indicating its potential as a nonlinear optical limiter.
JOURNAL OF MOLECULAR STRUCTURE
(2023)