Conferences

Click here for Refereed Journal Articles

Refereed Proceeding Articles

1. S Julaika, W Widiyastuti and H Setyawan, The effect of polyethylene glycol addition on the synthesis of solid acid catalyst and its applications in esterification reaction, IOP Conf. Ser.: Mater. Sci. Eng. 1010 012034 (2021). DOI: 10.1088/1757-899X/1010/1/012034
2. M F Rois, W Widiyastuti and H Setyawan, High porous carbon nanofiber derived from lignosulfonate material, IOP Conf. Ser.: Mater. Sci. Eng. 1010 012040 (2021). DOI: 10.1088/1757-899X/1010/1/012040
3. M Fauziyah, T Salsabila, H Setyawan and W Widiyastuti, Synthesis of Chitosan/Hydroxyapatite Nanofibers as A Wound Dressing via Electrospinning Method, J. Phys.: Conf. Ser. 1726 012019 (2021). DOI: 1742-6596/1726/1/012019
4. M. Fauziyah, W. Widiyastuti, H. Setyawan, A hydrophobic cellulose aerogel from coir fibers waste for oil spill application, IOP Conf. Ser.: Mater. Sci. Eng. 778 012019 (2020). DOI: 10.1088/1757-899X/778/1/012019
5. H Setyawan, P Nurlilasari and W Widiyastuti, New monopolar arrangement of electrodes to enhance the production of magnetite nanoparticles in an electrochemical cell, IOP Conf. Ser.: Mater. Sci. Eng. 778 012014 (2020). DOI: 10.1088/1757-899X/778/1/012014
6. Widiyastuti, H. Setyawan, M. F. Rois, H. Purwaningsih, P. Nurlilasari, MnO₂ Nanoparticles Prepared by Alternating Monopolar Arrangement Electrolysis and Their Electrochemical Performances, IOP Conf. Ser.: Mater. Sci. Eng. 778 012020 (2020). DOI: 10.1088/1757-899X/778/1/012020
7. L. J. Mawarani, H. A. Ajiz, W. Widiyastuti, H. Setyawan, Effect of nanosilica on foam stabilities of sodium lauryl sulfate and polysorbate mixture, AIP Conference Proceeding, 2219(1), 030002 (2020); DOI: 10.1063/5.0003006
8. M. F. Rois, R. A. Yuniar, W. Widiyastuti, H. Setyawan, Composite of coconut charcoal-based carbon/MnO₂ as metal-air battery electrocatalyst, AIP Conference Proceedings 2219, 050001 (2020). DOI: 10.1063/5.0003166
9. V. S. Y. Sarjani, P. S. Witri, T. Giovandi, W. Widiyastuti, M. F. Rois, H. Setyawan, Synthesis of reduced graphene oxide/MnO₂nanocomposites for oxygen reduction reaction catalyst, AIP Conference Proceedings 2219, 080004 (2020). DOI: 10.1063/5.0003169
10. T Salsabila, W Widiyastuti and H Setyawan, Electrosynthesis of hydroxyapatite by multiple electrode arrangement, IOP Conf. Ser.: Mater. Sci. Eng. 858 012021 (2020). DOI: 10.1088/1757-899X/858/1/012021
11. M Elma, H Setyawan, A Rahma, A E Pratiwi and E L A Rampun, Fabrication of Interlayer-free P123 Caronised Template Silica Membranes for Water Desalination: Conventional Versus Rapid Thermal Processing (CTP vs RTP) Techniques, IOP Conference Series: Materials Science and Engineering, 543, 012076 (2019). DOI: 10.1088/1757-899X/543/1/012076
12. R A Yuniar, W Widiyastuti, H Setyawan, H Purwaningsih, S Machmudah and D Anggoro, Formation of Carbon Fibres From Polymer Poly(vinyl alcohol)/Acetylene Black using Electrospinning Method, IOP Conference Series: Materials Science and Engineering, 543, 012030 (2019). DOI: 10.1088/1757-899X/543/1/012030
13. M Elma and H Setyawan, Synthesis of Silica Xerogels Obtained in Organic Catalyst via Sol Gel Route, IOP Conf. Ser.: Earth Environ. Sci. 175 012008 (2018).DOI: 10.1088/1755-1315/175/1/012008
14. N M I P Suari and H Setyawan, Electrophoretic deposition of silica on the anodized stainless steel, AIP Conference Proceedings 1840, 080005 (2017). DOI: 10.1063/1.4982303
15. A R Tigor, N Sakiynah and H Setyawan, A versatile electrochemical method to produce nanoparticles of manganese oxides by KMnO4 electrolysis, AIP Conference Proceedings 1586, 124 (2014); DOI: 10.1063/1.4866744
16. N M I P Suari and H Setyawan, Coating Steel with Nanosilica by Pulsed Direct Current Electrophoresis for Corrosion Protection, Advanced Materials Research 896 578-581 (2014). DOI: 10.4028/www.scientific.net/AMR.896.578
17. A Halim, H Setyawan, S Machmudah, T Nurtono and S Winardi, Effect of fuel rate and annealing process of LiFePO4 cathode material for Li-ion batteries synthesized by flame spray pyrolysis method, AIP Conference Proceedings 1586, 173 (2014); DOI: 10.1063/1.4866754
18. E Setyowati, S F Amalia, Nazriati, S Affandi, M Yuwana, H Setyawan, Hydrophobic Silica Coating Based on Waterglass on Copper by Electrophoretic Deposition, Applied Mechanics and Materials, 493, 749-754 (2014). DOI: 10.4028/www.scientific.net/AMM.493.749

Keynote/Invited Speaker/Guest Lecture

1. H. Setyawan, Catalytic performance of carbon-based materials derived from coir fibers, Functional Nano Powder International Conference, Padjadjaran University, 24 November 2020 (Webinar).
2. H. Setyawan, Peran Teknologi Disruptif dalam Pendidikan Tinggi Kimia Masa Depan, Seminar Nasional Kimia dan Pembelajarannya (SNKP), Universitas Malang (Webinar), 7 Nopember 2020.
3. H. Setyawan, M. Fauziyah, W. Widiyastuti, Using coir fibers as a carbon source when preparing N-doped carbon aerogel for electrocatalyst in metal-air batteries, International Seminar on Chemical Engineering Soehadi Reksowardojo (STKSR) 2019, Kupang, 7-9 October 2019.
4. H. Setyawan, W. Widiyastuti, A versatile electrochemical method for preparation of iron and other transition metal oxide nanoparticles, The 2nd International Conference and Exhibition on Powder Technology Indonesia (ICePTi 2019), Solo, 20-21 August 2019.
5. W. Widiyastuti, A.R. Fauziah, O.R.K. Hadijah, N.M.I.P. Suari, H. Setyawan, Activated Carbon Nanofibers Derived from Coconut Shell, Charcoal for Dye Removal Application, The 2nd International Conference and Exhibition on Powder Technology Indonesia (ICePTi 2019), Solo, 20-21 August 2019.
6. H. Setyawan, Doing research in Indonesia: the Perspective from my own experience, 2nd International Forum of Advanced Engineering Technology, Taipei, Taiwan, 21-23 February 2019.
7. H. Setyawan, W. Widiyastuti, The electrochemical method for the production of magnetite nanoparticles and its scale up, International Symposium of Indonesian Chemical Engineering (ISIChem), Padang, Indonesia, 4-5 October 2018.
8. H. Setyawan, Magnetite nanoparticles and its applications for wastewater treatment, International Workshop on Materials, Membrane, Energy and Water Management, Banjarmasin, Indonesia, 6-8 December 2017.
9. Widiyastuti, “The potential of MnO₂ nanoparticles prepared by electrochemical method for inexpensive electrocatalysts”, The 1st International Conference and Exhibition on Powder Technology Indonesia (ICePTi 2017), Bandung, 8-9 August 2017.
10. Widiyastuti, “The Route of Liquid Precursor to Nanoparticles in Flame/Combustion Spray Pyrolysis”, The 3^rd International Conference on Materials and Metallurgical Engineering and Technology (ICOMMET 2017), Surabaya, 30-31 October, 2017.
11. H. Setyawan, Bahan nanosilika fungsional dari abu biomassa dan potensi aplikasinya, Seminar Nasional Kimia dan Pendidikan Kimia IX (SN-KPK IX), Surakarta, 22 April 2017.
12. H. Setyawan, The role of mathematics in chemical engineering, International Conference on Mathematics: Pure, Applied and Computation (ICoMPAC) 2016, Surabaya, 23 November 2016.
13. H. Setyawan, Silica-coated magnetite nanoparticles and its applications as dye removal from wastewater, The 2nd Materials Research Society – Indonesia (MRS-Id) Meeting, Bandung, 24-26 October 2016. [photo]
14. H. Setyawan, Functional nanosilica materials from biomass ash and their applications, International Symposium for Young Chemical Engineers, Taipei, 1-4 September 2016. [photos]
15. H. Setyawan, Guest Lecture at the Dept. of Chemical Engineering, National Taiwan University, 2 September 2016: Functional nanosilica materials from biomass ash and their applications.
16. H. Setyawan, The use of bagasse ash as a silica source for nanosilicas and their applications, The 6th Nanoscience and Nanotechnology Symposium (NNS 2015), Solo, 4-5 November 2015.
17. H. Setyawan, Silica-coated magnetite nanoparticles and their application for dye removal of wastewater, The 2nd Padjadjaran International Physics Symposium, Bandung, 1-2 September 2015.
18. H. Setyawan, Pemanfaatan abu ketel pabrik gula untuk produksi silika gel dan aplikasinya sebagai desiccan, Seminar Nasional Teknik Kimia Soebardjo Brotohardjono XI, Surabaya, 4 juni 2015.
19. H. Setyawan, Utilization of biomass ash as a silica source for functional nanosilica materials, Shizuoka University 4 th International Symposium for Promotion of Interdisciplinary Domain Research, Shizuoka, 1-2 December 2014. [Photo]
20. H. Setyawan, Using bagasse ash as a silica source for functional porous silica gels, International Seminar on Fundamentals and Applications of Chemical Engineering (ISFAChE 2014), Kuta-Bali, 12-13 November 2014.
21. H. Setyawan, F. Fajaroh, Synthesis and characterization of magnetite nanoparticles by electrochemical method in an aqueous system, International Conference and Exhibition on Sustainable Energy and Advanced Materials (ICESEAM 2011), Solo-Indonesia, 3-4 October 2011.

Regular Presentations

1. F. Fahmi, W. Widiyastuti, H. Setyawan, Graphitization of Coconut Shell Charcoal for Sulfonated Mesoporous Carbon Catalyst Preparation and its Catalytic Behaviour in Esterification Reaction, International Seminar on Chemical Engineering Soehadi Reksowardojo (STKSR) 2019, Kupang, 7-9 October 2019. (Best Paper Award)
2. H. Setyawan, M. Fauziyah, W. Widiyastuti, Mulit-functional sorbent derived from lignocellulose aerogel made of coir fibers, 18th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019), Sapporo, Japan, 23-27 September 2019.
3. M. Fauziyah, W. Widiyastuti, H. Setyawan, Metal-free electrocatalyst for oxygen reduction reaction from coir fibers, 18th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019), Sapporo, Japan, 23-27 September 2019. (Excellent Poster Award)
4. M. Fauziyah, W. Widiyastuti, H. Setyawan, High Performance of Sulfonated Carbon Aerogel from Coir Fiber Waste as Solid Acid Catalyst, The 2nd International Conference and Exhibition on Powder Technology Indonesia (ICePTi 2019), Solo, 20-21 August 2019.
5. P. Nurlilasari, W. Widiyastuti, H. Setyawan, The Effects of The Initial pH and Voltage on The Formation of Magnetite Nanoparticles, The 2nd International Conference and Exhibition on Powder Technology Indonesia (ICePTi 2019), Solo, 20-21 August 2019.
6. M. F. Rois, R.A. Yuniar, W. Widiyastuti, and H. Setyawan, MnO2/Carbon Composite Made From Coconut Charcoal as Metal-Air Battery Electrocatalyst, The 2nd International Conference and Exhibition on Powder Technology Indonesia (ICePTi 2019), Solo, 20-21 August 2019.
7. V.S.Y. Sarjani, P.S. Witri, T. Giovandi, W. Widiyastuti, M.F. Rois, H. Setyawan, Synthesis of Reduced Graphene Oxide/MnO2 Nanocomposites for Oxygen Reduction Reaction Catalyst, The 2nd International Conference and Exhibition on Powder Technology Indonesia (ICePTi 2019), Solo, 20-21 August 2019.
8. L. J. Mawarani, H. A. Ajiz, W. Widiyastuti, H. Setyawan, Effect of Nanosilica on Foam Stabilities of Sodium Laureth Sulfate and Polysorbate Mixture, The 2nd International Conference and Exhibition on Powder Technology Indonesia (ICePTi 2019), Solo, 20-21 August 2019.
9. S. Julaika, A. F. Fadli, W. Widiyastuti, H. Setyawan, Synthesis of Solid Acid Catalyst by Sulfonating Mesoporous Silica-Carbon Composite with Sulfuric Acid, The 2nd International Conference and Exhibition on Powder Technology Indonesia (ICePTi 2019), Solo, 20-21 August 2019.
10. W. Widiyastuti, M.F. Rois, M. Mahmudi, H. Setyawan, Synthesis of MnO2 nanoparticles prepared by multiple electrodes electrolysis and their electrocatalytic activity, The Padjadjaran International Converence on Energy Research, Technology and Innovation (PicERTI 2018), Bandung, 1-2 October 2018.
11. F. Fahmi, N.A.A. Dewayanti, W. Widiyastuti, H. Setyawan, Synthesis of Coconut Shell Based Graphite and Graphene, The 3rd Materials Research Society – Indonesia (MRS-Id) Meeting, Bali, 31 July – 2 Agustus 2018.
12. A.F. Fadli, S. Julaika, W. Widiyastuti, H. Setyawan, Synthesis of Sulfonic Acid Mesoporous Silica-Carbon as Catalyst for Biodiesel Production, The 3rd Materials Research Society – Indonesia (MRS-Id) Meeting, Bali, 31 July – 2 Agustus 2018.
13. M. Fauziyah, M.F. Rois, W. Widiyastuti, H. Setyawan, Synthesis of Cellulose-Silica Aerogel Composite as Reusable Absorbent from Waste Paper, the 24th Regional Symposium on Chemical Engineering (RSCE 2017), Semarang, 15-16 November 2017
14. M.F. Rois, M. Fauziyah, W. Widiyastuti, H. Setyawan, Synthesis of Cellulose Aerogel from Sugarcane Bagasse and Its Application As Absorbent, Nanoscience and Nanotechnology Symposium (NNS 2017), Bandung, 22-24 October 2017.
15. N.A.A Dewayanti, Fahmi, H. Setyawan, Synthesis and Characterization of Graphene From Coconut Shell Charcoal Using Modified-Hummer Method, Nanoscience and Nanotechnology Symposium (NNS 2017), Bandung, 22-24 October 2017.
16. N.M.I.P. Suari, W. Margareta, V.W. Tedjorahardjo, W. Widiyastuti. H. Setyawan, Silica Aerogel Synthesis by Freeze Drying Method, Nanoscience and Nanotechnology Symposium (NNS 2017), Bandung, 22-24 October 2017.
17. D. L. Kartika, H. Setyawan, High performance electrocatalyst for oxygen reduction reaction of magnetite nanoparticle-based as a cathode metal-air battery, International Coneference on Science, Engineering and Technology, Singapore, 2-3 June 2017.
18. M. Fauziah, K. Taufik, A.N. Afifah, Widiyastuti, H. Setyawan, Reusable and high strength superabsorbent of cellulose-silica aerogel from waste paper, The 2nd Materials Research Society – Indonesia (MRS-Id) Meeting, Bandung, 24-26 October 2016.
19. N. Puspitasari, P. Meiditaharja, N.A.A. Dewayanti, H. Setyawam, Highly throughput synthesis of magnetite nanoparticles by electro-oxidation of iron using multielectrodes, The 2nd Materials Research Society – Indonesia (MRS-Id) Meeting, Bandung, 24-26 October 2016.
20. Fahmi, H. Setyawan, Synthesis of activated carbon and graphite from coconut shell, 2016 International Symposium for Young Chemical Engineers, Taipei, 1-4 September 2016.
21. M.D. Pusfitasari, H. Setyawan, S. Affandi, Synthesis of silica-coated magnetite nanoparticles by electrochemical method as adsorbent for methylene bule removal from waste water sample, The 6th Nanoscience and Nanotechnology Symposium (NNS 2015), Solo, 4-5 November 2015.
22. D.A. Rachmawati, H. Setyawan, S. Affandi, Porous silica as thermal insulation material from water glass by electrophoretic deposition method, The 6th Nanoscience and Nanotechnology Symposium (NNS 2015), Solo, 4-5 November 2015.
23. Supriyono, H. Setyawan, Anodized magnesium as an electrode for sea water-activated battery, The 6th Nanoscience and Nanotechnology Symposium (NNS 2015), Solo, 4-5 November 2015.
24. M.D. Pusfitasari, H. Setyawan, S. Affandi, Nanopartikel magnetite bersalut silika sebagai adsorben untuk menghilangkan metilene biru dalam sampel air limbah, Seminar Nasional Teknik Kimia Soebardjo Brotohardjono XI, Surabaya, 4 juni 2015.
25. D.A. Rachmawati, H. Setyawan, S. Affandi, Silika berpori dri water glass dengan metode deposisi elektroforesis, Seminar Nasional Teknik Kimia Soebardjo Brotohardjono XI, Surabaya, 4 juni 2015.
26. Supriyono, H. Setyawan, S. Affandi, Magnesium teranodisasi sebagai anoda baterai yang teraktivasi air laut, Seminar Nasional Teknik Kimia Soebardjo Brotohardjono XI, Surabaya, 4 juni 2015.
27. N.A. Rahman, C. Hartato, D. Prihatma, M. Yuwana, S.R. Juliastuti, H. Setyawan, The effect of acid kinds and aging temperature on the amount of amine grafted on silica gel from bagasse ash using in-situ method, International Seminar on Chemical Engienrring in Conjunction with Seminar Teknik Kimia Soehadi Reksowardojo (ChEMMPRo 2014), Bandung, 16-17 October 2014.
28. H. Setyawan, N.A. Rahman, I. Widhiana, S.R. Juliastuti, S. Affandi, Preparation of mesoporous silicas from bagasse ash using polyethylene glycol templating, International Conference on Engineering and Applied Science (ICEAS 2013), Osaka, Japan, 7-8 November 2013.
29. A. Nur, A. Rahmawati, N.I. Ilmi, S. Affandi, A. Widjaja, H. Setyawan, Electrochemical Synthesis of Nanosized Hydroxyapatite by Pulsed Direct Current Method, AIP Conf. Proc. 1586, 86 (2014). Link
30. D. Rizkiyanto, W.E. Putri, H. Setyawan, S. Affandy, Preparation of Thermal Insulator of Silica from Waterglass Using Electrophoretic Deposition, AIP Conf. Proc. 1586, 101 (2014). Link
31. F. Dimasruhin, M. Ichwan, A. Nur, M. Yuwana, H. Setyawan, Electrodeposition of Hydroxyapatite-SiO2 Composite Particles for Biomedical Applications, AIP Conf. Proc. 1586, 119 (2014). Link
32. A.R. Tigor, N. Sakiynah, Machmudi, H. Setyawan, A Versatile Electrochemical Method to Produce Nanoparticles of Manganese Oxides by KMnO4 Electrolysis, AIP Conf. Proc. 1586, 124 (2014). Link
33. V.M. Pratiwi, R.N. Ratfiandini, D.A. Wangling, Mahmudi, H. Setyawan, Synthesis Fe3O4/C as Electrochemical Capacitor in Aqueous Electrolytes, AIP Conf. Proc. 1586, 127 (2014). Link
34. A. Halim, Widiyastuti, H. Setyawan, T. Nurtono, S. Winardi, Effect of Fuel Rate and Annealing Process of LiFePO4 Cathode Material for Li-ion Batteries synthesized by Flame Spray Pyrolysis Method, 5th Nanoscience and Nanotechnology Symposium (NNS 2013), Surabaya, Indonesia, 23-25 October 2013.
35. F. Fajaroh, H. Setyawan, Sutrisno, S. Wonorahardjo , Nazriati, To Enhance The Purity and Crystallinity of Magnetite Nanoparticles Prepared by Surfactant-Free Electrochemical Method by Imposing Higher Voltage,  5th Nanoscience and Nanotechnology Symposium (NNS 2013), Surabaya, Indonesia, 23-25 October 2013.
36. Z.M. Putrie, H. Setyawan, Preparation of sulfonate-grafted silica/chitosan hybrid membrane for proton exchange membrane, International Conference on Advanced Materials Science and Technology (ICAMST 2013), Yogyakarta, Indonesia, 17-18 September 2013.
37. S. Muljani, H. Setyawan, G. Wibawa, A. Altway, Synthesis of mesoporous silica from Dieng geothermal sludge, Indonesia,  International Conference on Advanced Materials Science and Technology (ICAMST 2013), Yogyakarta, Indonesia, 17-18 September 2013.
38. N.M.I.P. Suari, H. Setyawan, Coating of steel with nanosilica by pulsed direct current electrophoresis for corrosion protection,  International Conference on Advanced Materials Science and Technology (ICAMST 2013), Yogyakarta, Indonesia, 17-18 September 2013.
39. E. Setyowati, S.F. Amalia, Nazriati, S. Affandi, M. Yuwana, H. Setyawan, Hydrophobic silica coating based on waterglass on copper by electrophoretic deposition, 1st International Conferences on Mechanical Engineering (ICOME 2013), Lombok, 12-14 September 2013.
40. Z.M. Putrie, R. Pratama, V.M. Pratiwi, M. Yuwana, H. Setyawan, Synthesis of proton exchange membrane from SO3H-grafted silica membrane in production of electrolyzed oxydized water (EOW), 19th Regional Symposium on Chemical Engineering, Kuta, Bali, Indonesia, 7-8 November 2012.
41. N.M.I.P. Suari, H. Setyawan, S. Affandi, R.I. Saputra, R. Kurniasari, Coating of steel with nanosilica by electrophoresis for corrosion protection, 19th Regional Symposium on Chemical Engineering, Kuta, Bali, Indonesia, 7-8 November 2012.
42. A. Nur, D.L. Martasari, D. Nurwijayanti, A. Widjaja, H. Setyawan, Sintesis Hydroxyapatite Berukuran Nano dengan Metode Elektrokimia, Seminar Nasional Teknik Kimia Indonesia (SNTKI 2012), Jakarta, 20-21 September 2012.
43. N.A. Rahman, A. Royani, F. Harmansyah, S.R. Juliastuti, M. Yuwana, H. Setyawan, Pencangkokan gugus amine pada permukaan silica gel dari abu bagasse dengan metode in-situ, Seminar Nasional Teknik Kimia Indonesia (SNTKI 2012), Jakarta, 20-21 September 2012.
44. R. Zulhijah, S. Machmudah, Wahyudiono, H. Setyawan, Formation of layer on steel by electrolysis-hydrothermal for corrosion protection, Industrial Research Workshop and National Seminars (IRWNS) 2012, Bandung, 11 July 2012.
45. I. Widiana, H. Setyawan, Synthesis of mesoporous silicas from bagasse ash by polyethylene glycol templating, National Seminar on the Progress of Research and Technology in Industrial Fields in Indonesia, Yogyakarta, 16 May 2012.
46. H. Setyawan, F. Fajaroh, K.A. Rachman, M. Pusfitasari, M. Yuwana, Synthesis of magnetite nanoparticles by electrochemical method using pulsed-direct current, The 14th Asia Pacific Confederation of Chemical Engineering Congress (APCChE 2012), Singapore, 21-24 February 2012.
47. Nazriati, H. Setyawan, S. Winardi, Synthesis of silica aerogel from bagasse ash by ambient pressure drying, The 4th Nanoscience and Nanotechnology Symposium (NNS 2011), Bali, 23-25 September 2011. Link
48. F. Fajaroh, H. Setyawan, S. Winardi, Influence of synthesis conditions on the properties of Fe3O4 nanoparticles prepared by surfactant-free electrochemical method, The 4th Nanoscience and Nanotechnology Symposium (NNS 2011), Bali, 23-25 September 2011. Link
49. H. Setyawan, R. Balgis, Preparation of silica mesoporous from sodium silicate by gelatin templating, CHEMECA 2010, Adelaide, Australia, 23-26 September 2010.
50. H. Setyawan, M. Yuwana, S. Winardi, Effect of Solution pH on the Morphology of Silica Particles Prepared by the Spray Drying of Sodium Silicate Solution, Proc. The fourth Asian Particle Technology Symposium (APT 2009), New Delhi, India, 14-16 September 2009.
51. R. Balgis, H. Setyawan, Development of Water Selective Silica-Composite Adsorbent from Water Glass for Solid Sorption Refrigeration System, Proc. The 6th Kumamoto University Forum Surabaya, Surabaya, 5-6 November 2008.
52. S. Affandi, S., H. Setyawan, D. Kusumaningrum, D. Handriyani, S. Winardi, A simple low-energy method to produce silica gel with high surface area from bagasse ash, Proceeding 14th Regional Symposium on Chemical Engineering, AM-19, Yogyakarta, December 4-5, 2007.