Mohammed Abdullah Issa
@ijsu.edu.iq
Imam Ja’afar Al-Sadiq University
RESEARCH, TEACHING, or OTHER INTERESTS
Filtration and Separation, Environmental Engineering, Environmental Chemistry, Materials Science
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Mohammed Abdullah Issa, Zaid H. Jabbar, Hamid Zentou, and Reham Basim Khalaf
Wiley
ABSTRACTA rapid, eco‐friendly, and selective monitoring of Fe(III) in real media utilizing carbon dots (CDs) as a luminescence detector has been reported. CDs were fabricated by a hydrothermal route from empty fruit bunch biochar. The as‐synthesized CDs were analyzed using various analytical tools. The results reveal that CDs have spherical shapes with a narrow particle size distribution and are enriched with multiple active sites, which impart excellent hydrophilicity and photostability. The CDs displayed bright blue emission under UV light with emission/excitation maxima at 452/350 nm, respectively, and a QY of 7.54%. The CDs exhibited high resistance to photobleaching and high salt conditions and pose a long lifetime of up to 6 months with no agglomeration. The detection variables, including pH, temperature, and CDs concentration, were optimized via response surface methodology. The statistical data verified the precision of the quadratic model for predicting the sensing performance of the nanoprobe. Under optimal environments, a linear range from 0 to 50 μM and a detection limit of 0.17 μM was obtained. The turn‐off process includes the strong coordination between Fe(III) and electron‐donating oxygen species on the edge of CDs. The rapid luminescence recognition using acid‐free materials renders CDs a promising option for water treatment.
Noor Amirah Abdul Halim, Mohammed Abdullah Issa, Rozaini Abdullah, Sharifah Zati Hanani Syed Zuber, Nor Fauziah Zainudin, and Wan Jing Ooi
AIP Publishing
Hamid Zentou, Zurina Z. Abidin, Mohammed Abdullah Issa, Robiah Yunus, and Dayang Radiah Awang Biak
Elsevier BV
Zaid H. Jabbar, Bassim H. Graimed, Ayah A. Okab, Mohammed Abdullah Issa, Saad H. Ammar, Hussein J. Khadim, and Yasmeen A. Shafiq
Elsevier BV
Zaid H. Jabbar, Ayah A. Okab, Bassim H. Graimed, Mohammed Abdullah Issa, and Saad H. Ammar
Elsevier BV
Bassim H. Graimed, Ayah A. Okab, Zaid H. Jabbar, Mohammed Abdullah Issa, and Saad H. Ammar
Elsevier BV
Zaid H. Jabbar, Ayah A. Okab, Bassim H. Graimed, Mohammed Abdullah Issa, and Saad H. Ammar
Elsevier BV
Mohammed M. Alkhabet, Saad H. Girei, Husam K. Salih, Rasha Thabit, Mohammed Abdullah Issa, Suriati Paiman, Norhana Arsad, Mohammed Thamer Alresheedi, Mohd A Mahdi, and Mohd H Yaacob
Elsevier BV
Zaid H. Jabbar, Bassim H. Graimed, Mohammed Abdullah Issa, Saad H. Ammar, Shahlaa Esmail Ebrahim, Hussein J. Khadim, and Ayah A. Okab
Elsevier BV
Mohammed Abdullah Issa, Hamid Zentou, Zaid H. Jabbar, Zurina Z. Abidin, Haninah Harun, Noor Amirah Abdul Halim, Mohammed M. Alkhabet, and Musa Y. Pudza
Environmental Science and Pollution Research Springer Science and Business Media LLC
Zurina Zainal Abidin, Musa Yahaya Pudza, Mohammed Abdullah Issa, Hamid Zentou, Nur Haninah Harun, and Noor Amirah Abdul Halim
Elsevier
Hamid Zentou, Zurina Z. Abidin, Robiah Yunus, Dayang Radiah Awang Biak, Mohammed Abdullah Issa, and Musa Yahaya Pudza
Elsevier BV
Hamid Zentou, Zurina Zainal Abidin, Robiah Yunus, Dayang Radiah Awang Biak, and Mohammed Abdullah Issa
Wiley
AbstractResponse surface methodology was used to optimize the performance of pervaporation of ethanol aqueous solution using polydimethylsiloxane hollow‐fiber membrane. The effects of four operating conditions, that is, the feed temperature (30–50°C), the feed flow rate (10–50 L/h), ethanol concentration (5–20 wt%), and the vacuum pressure (10–50 KPa) on the membrane selectivity and the total flux of permeation were investigated with response surface methodology. The results showed that a quadratic model was suggested for both selectivity and total flux showing a high accuracy with R2 = 0.9999 and 0.9995, respectively. The developed models indicated a significant effect of the four studied factors on both selectivity and total flux with some significant interactions between these factors. The optimum selectivity was 15.56, achieved for a feed temperature of 30°C, feed flow rate of 10 L/h, ethanol concentration of 15 wt%, and a permeate pressure of 10.74 KPa whereas the optimum total flux was 1833.66 g/m2.h was observed for at a feed temperature of 50°C, a feed flow rate of 50 L/h, ethanol concentration of 15 wt%, and a permeate pressure of 49.38 KPa.
Hamid Zentou, Zurina Zainal Abidin, Robiah Yunus, Dayang R. Awang Biak, Mohammed Abdullah Issa, and Musa Yahaya Pudza
American Chemical Society (ACS)
Despite the advantages of continuous fermentation whereby ethanol is selectively removed from the fermenting broth to reduce the end-product inhibition, this process can concentrate minor secondary products to the point where they become toxic to the yeast. This study aims to develop a new mathematical model do describe the inhibitory effect of byproducts on alcoholic fermentation including glycerol, lactic acid, acetic acid, and succinic acid, which were reported as major byproducts during batch alcoholic fermentation. The accumulation of these byproducts during the different stages of batch fermentation has been quantified. The yields of total byproducts, glycerol, acetic acid, and succinic acid per gram of glucose were 0.0442, 0.023, 0.0155, and 0.0054, respectively. It was found that the concentration of these byproducts linearly increases with the increase in glucose concentration in the range of 25–250 g/L. The results have also showed that byproduct concentration has a significant inhibitory effect on specific growth coefficient (μ) whereas no effect was observed on the half-velocity constant (Ks). A new mathematical model of alcoholic fermentation was developed considering the byproduct inhibitory effect, which showed a good performance and more accuracy compared to the classical Monod model.
Mohammed Abdullah Issa, Zurina Z. Abidin, Shafreeza Sobri, Suraya Abdul Rashid, Mohd Adzir Mahdi, and Nor Azowa Ibrahim
Springer Science and Business Media LLC
AbstractA versatile synthetic approach for development of highly fluorescent nitrogen-doped carbon dots (N-CDs) from carboxymethylcellulose in the presence of linear polyethyleneimine (LPEI) has been developed. According to single factor method, central composite design incorporated with response surface methodology matrix was applied to find and model optimal conditions for the temperature (220–260 °C), duration (1–3 h) and LPEI weight (0.5–1.5%). The statistical results show that duration was the most significant parameter for efficient carbonization conversion rate in comparison with temperature and LPEI weight. The reduced cubic model (R2 = 0.9993) shows a good correlation between the experimental data and predicted values. The optimal variables were temperature of 260 °C, duration of 2 h and LPEI weight of 1%. Under these conditions, quantum yield of up to 44% was obtained. The numerically optimized N-CDs have an average size of 3.4 nm with graphitic nature owing to the abundant amino species incorporated into the carbon core framework. The blue-green N-CDs possess emission dependent upon the solvent polarity, wide pH stability with enhanced emission in an acidic environment. Impressively, the N-CDs show long-shelf-life for up to 1 year with no noticeable precipitation. The N-CDs were able to recognize a high concentration of Fe3+ ions with a detection limit of 0.14 μM in acidic solution owing to the special coordination for Fe3+ to be captured by electron-donating oxygen/ amino groups around N-CDs. Moreover, the N-CDs can also be used as a new kind of fluorescent ink for imaging applications.
Mohammed Abdullah Issa and Zurina Z. Abidin
MDPI AG
As a remedy for environmental pollution, a versatile synthetic approach has been developed to prepare polyvinyl alcohol (PVA)/nitrogen-doped carbon dots (CDs) composite film (PVA-CDs) for removal of toxic cadmium ions. The CDs were first synthesized using carboxymethylcellulose (CMC) of oil palms empty fruit bunch wastes with the addition of polyethyleneimine (PEI) and then the CDs were embedded with PVA. The PVA-CDs film possess synergistic functionalities through increasing the content of hydrogen bonds for chemisorption compared to the pure CDs. Optical analysis of PVA-CDs film was performed by ultraviolet-visible and fluorescence spectroscopy. Compared to the pure CDs, the solid-state PVA-CDs displayed a bright blue color with a quantum yield (QY) of 47%; they possess excitation-independent emission and a higher Cd2+ removal efficiency of 91.1%. The equilibrium state was achieved within 10 min. It was found that adsorption data fit well with the pseudo-second-order kinetic and Langmuir isotherm models. The maximum adsorption uptake was 113.6 mg g−1 at an optimal pH of 7. Desorption experiments showhe that adsorbent can be reused fruitfully for five adsorption-desorption cycles using 0.1 HCl elution. The film was successfully applied to real water samples with a removal efficiency of 95.34% and 90.9% for tap and drinking water, respectively. The fabricated membrane is biodegradable and its preparation follows an ecofriendly green route.
Mohammed Abdullah Issa, Zurina Z. Abidin, Musa Y. Pudza, and Hamid Zentou
Royal Society of Chemistry (RSC)
Low value waste resources have been converted into value-added luminescence carbon dots for copper adsorption from contaminated water.
Mohammed Abdullah Issa, Zurina Zainal Abidin, Shafreeza Sobri, Suraya Abdul-Rashid, Mohd Adzir Mahdi, Nor Azowa Ibrahim, and Musa Y. Pudza
Elsevier BV
Musa Yahaya Pudza, Zurina Zainal Abidin, Suraya Abdul Rashid, Faizah Md Yasin, A. S. M. Noor, and Mohammed A. Issa
MDPI AG
The materials and substances required for sustainable water treatment by adsorption technique, are still being researched widely by distinguished classes of researchers. Thus, the need to synthesize substances that can effectively clean up pollutants from the environment cannot be overemphasized. So far, materials in bulk forms that are rich in carbon, such as biochar and varieties of activated carbon have been used for various adsorptive purposes. The use of bulk materials for such purposes are not efficient due to minimal surface areas available for adsorption. This study explores the adsorption task at nano dimension using carbon dots (CDs) from tapioca. The properties of carbon structure and its influence on the adsorptive efficacy of carbon nanoparticles were investigated by energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), high resolution transmission electron microscopy (HrTEM), and atomic force microscopy (AFM). The results implied carbon present in CDs are good adsorbents for effective adsorption of heavy metal ions (lead) with removal efficiency of 80.6% in aqueous environment. The adsorption process as explored by both Langmuir and Freundlich isotherms have proven favorability of the adsorption process. Langmuir form two and three have correlation coefficients R2 at 0.9922 and 0.9912, respectively. The Freundlich isotherm confirms CDs as having defined surface heterogeneity and the exponential distribution of active sites. The adsorption of lead unto CDs obeyed the second order kinetic model with coefficient of determination, R2 of 0.9668 and 0.9996 at an initial lead concentration of 20 mg/L and 100 mg/L, respectively. The findings validated the efficiency of CDs derived from tapioca as an excellent material for further utilization in the environmental fields of wastewater pollution detection and clean up, bio-imaging, and chemical sensing applications.
Mohammed Abdullah Issa, Zurina Z. Abidin, Shafreeza Sobri, Suraya Rashid, Mohd Adzir Mahdi, Nor Azowa Ibrahim, and Musa Y. Pudza
MDPI AG
The current research mainly focuses on transforming low-quality waste into value-added nanomaterials and investigating various ways of utilising them. The hydrothermal preparation of highly fluorescent N-doped carbon dots (N–CDs) was obtained from the carboxymethylcellulose (CMC) of oil palm empty fruit bunches and linear-structured polyethyleneimines (LPEI). Transmission electron microscopy (TEM) analysis showed that the obtained N–CDs had an average size of 3.4 nm. The N–CDs were monodispersed in aqueous solution and were strongly fluorescent under the irradiation of ultra-violet light. A detailed description of the morphology and shape was established using Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). It was shown that LPEI were successfully tuned the fluorescence (PL) properties of CDs in both the intrinsic and surface electronic structures, and enhanced the quantum yield (QY) up to 44%. The obtained N–CDs exhibited remarkable PL stability, long lifetime and pH-dependence behaviour, with the excitation/emission maxima of 350/465.5 nm. Impressively, PL enhancement and blue-shifted emission could be seen with the dilution of the original N–CDs solution. The obtained N–CDs were further applied as fluorescent probe for the identification of Cu2+ in aqueous media. The mechanism could be attributed to the particularly high thermodynamic affinity of Cu2+ for the N-chelate groups over the surface of N–CDs and the fast metal-to-ligand binding kinetics. The linear relationship between the relative quenching rate and the concentration of Cu2+ were applied between 1–30 µM, with a detection limit of 0.93 µM. The fluorescent probe was successfully applied for the detection of Cu2+ in real water. Moreover, a solid-state film of N–CDs was prepared in the presence of poly (vinyl alcohol) (PVA) polymer and found to be stable even after 72-h of continuous irradiation to UV-lamp. In contrast to the aqueous N–CDs, the composite film showed only an excitation independent property, with enhanced PL QY of around 47%. Due to the strong and stable emission nature of N–CDs in both aqueous and solid conditions, the obtained N–CDs are ideal for reducing the overall preparation costs and applying them for various biological and environmental applications in the future.
Musa Y. Pudza, Zurina Z. Abidin, Suraya Abdul‐Rashid, Faizah Md. Yassin, Ahmad S. M Noor, and Mohammed Abdullah
Wiley
AbstractThis research demonstrates an economical and efficient reduction of carbon foot print. Tapioca powder as a source of organic carbon was utilized in the synthesis of carbon dots through optimization of the synthesis parameters such as temperature, dosage and time. Photoluminescent quantum yield (PLQY) was obtained under the visible region of 340 nm at 34.9%, which was achieved without dopants such as sulfur and nitrogen that are popularly used to increase the value of photoluminescence. The characterization of carbon dots such as FTIR and HrTem, were carried out for the analysis of functional groups, particle sizes (1‐5 nm) and shapes (quasi‐spherical). The high carbon‐carbon bonds and oxygen groups detected in FTIR analysis validates the basis of fluorescence of carbon dots and also presence of hydroxyl (OH), carboxylic acids (COO), and other vital functional groups (C=O, C−O‐C, C−H). These characteristics makes tapioca based carbon dots suitable for application in the fields of environmental studies including sensitive detection and absorbance of pollutants in water and bio imaging in health sciences.
Musa Yahaya Pudza, Zurina Zainal Abidin, Suraya Abdul Rashid, Faizah Md Yasin, Ahmad Shukri Muhammad Noor, and Mohammed A. Issa
MDPI AG
Nowadays, to ensure sustainability of smart materials, it is imperative to eliminate or reduce carbon footprint related to nano material production. The concept of design of experiment to provide an optimal synthesis process, with a desired yield, is indispensable. It is the researcher’s goal to get optimum value for experiments that requires multiple runs and multiple inputs. Herein, is a reliable approach of utilizing design of experiment (DOE) for response surface methodology (RSM). Thus, to optimize a facile and effective synthesis process for fluorescent carbon dots (CDs) derived from tapioca that is in line with green chemistry principles for sustainable synthesis. The predictions for fluorescent CDs synthesis from RSM were in excellent agreement with the artificial neural network (ANN) model prediction by the Levenberg–Marquardt back propagation (LMBP) algorithm. Considering R2, root mean square error (RMSE) and mean absolute error (MAE) have all revealed a positive hidden layer size. The best hidden layer of neurons were discovered at point 4-8, to confirm the validity of carbon dots, characterization of surface morphology and particles sizes of CDs were conducted with favorable confirmations of the unique characteristics and attributes of synthesized CDs by hydrothermal route.